• Object#block in irb_binding (irb):6
    • Student#save $GemPath0/gems/activerecord-5.0.4/lib/active_record/suppressor.rb:40
      • ActiveRecord::SuppressorRegistry.method_missing $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:49
        • Kernel#singleton_class $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
        • #<Class:ActiveRecord::SuppressorRegistry>.delegate $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:153
          • Kernel#caller_locations $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:169
          • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:169
          • Thread::Backtrace::Location#path $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:170
          • Thread::Backtrace::Location#lineno $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:170
          • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:172
          • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
          • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:175
            • #<Class:ActiveRecord::SuppressorRegistry>.block in delegate $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:175
              • Symbol#=~ $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:178
              • Module#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:197
                • Module#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:197
              • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:197
              • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:197
              • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:200
              • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:202
              • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:204
              • Array#join $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:200
              • Module#module_eval $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/delegation.rb:213
                • BasicObject#singleton_method_added $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
        • ActiveRecord::SuppressorRegistry.suppressed $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
          • ActiveRecord::SuppressorRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
            • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
            • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
              • ActiveRecord::SuppressorRegistry#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/suppressor.rb:54
            • Thread#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
      • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/suppressor.rb:41
      • Module#name $GemPath0/gems/activerecord-5.0.4/lib/active_record/suppressor.rb:41
      • Student#save $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:317
        • Student#rollback_active_record_state! $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:332
          • Student#remember_transaction_record_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:413
            • Student#__temp__e6f6 $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:34
              • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                  • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                    • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                  • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
            • Student#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:452
              • Kernel#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:453
            • Hash#reverse_merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:17
              • Hash#merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:19
          • Student#block in save $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:318
            • Student#with_transaction_returning_status $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:390
              • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:392
              • Student.transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:210
                • Student.connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:90
                  • Student.retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:127
                    • Student.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:121
                      • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                          • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                      • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                    • Student.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                      • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                      • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                        • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                        • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                          • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:99
                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:880
                      • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:916
                        • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:933
                          • #<Class:Process>#pid $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:934
                          • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                            • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                        • Concurrent::Map#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:118
                          • Concurrent::Map#get_or_default $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:109
                            • Hash#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:110
                      • ActiveRecord::ConnectionAdapters::ConnectionPool#connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:363
                        • #<Class:Thread>#current $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:364
                        • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:585
                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                          • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                            • Kernel#hash $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:20
                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:225
                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#current_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:240
                    • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:215
                      • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:216
                  • ActiveRecord::ConnectionAdapters::NullTransaction#joinable? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:39
                  • ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:187
                    • ActiveRecord::ConnectionAdapters::TransactionManager#begin_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:154
                      • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:215
                        • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:216
                      • ActiveRecord::ConnectionAdapters::NullTransaction#joinable? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:39
                      • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:158
                        • ActiveRecord::ConnectionAdapters::RealTransaction#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:128
                          • ActiveRecord::ConnectionAdapters::RealTransaction#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:48
                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:50
                              • ActiveRecord::ConnectionAdapters::TransactionState#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:6
                            • Hash#fetch $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:52
                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#begin_db_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:235
                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:582
                              • Kernel#object_id $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                              • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:17
                                • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:32
                                  • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:41
                                    • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:53
                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                    • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                      • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                        • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                          • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:78
                                            • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                              • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                            • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:80
                                              • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                  • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                              • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:56
                                                  • Kernel#dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                    • Kernel#initialize_dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                      • Hash#initialize_copy $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                              • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                  • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                  • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                              • Array#last $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:82
                                              • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                  • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                  • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                              • Array#push $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:85
                                      • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                        • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                          • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:6
                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in begin_db_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:236
                                    • SQLite3::Database#transaction $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:495
                                      • Symbol#to_s $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:496
                                      • SQLite3::Database#execute $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:122
                                        • Kernel#nil? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:123
                                        • SQLite3::Database#prepare $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:90
                                          • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                            • SQLite3::Statement#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                          • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:92
                                          • SQLite3::Database#block in execute $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:137
                                            • SQLite3::Statement#bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:35
                                              • Array#flatten $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                              • Array#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                            • SQLite3::Statement#columns $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:101
                                              • SQLite3::Statement#get_metadata $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:135
                                                • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                  • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                  • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                            • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:142
                                            • Enumerable#map $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:152
                                              • SQLite3::Statement#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:106
                                                • Kernel#loop $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                  • SQLite3::Statement#block in each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                    • SQLite3::Statement#step $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                      • SQLite3::Database#encoding $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                    • SQLite3::Statement#done? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:109
                                          • SQLite3::Statement#closed? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:97
                                          • SQLite3::Statement#close $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:97
                                      • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:498
                                • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:41
                                  • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:45
                                    • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                      • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                        • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                          • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:82
                                            • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                              • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                            • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:88
                                              • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                  • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                              • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                  • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                  • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                              • Array#pop $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:90
                                              • Hash#merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:92
                                              • String#split $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                              • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                              • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:23
                                                • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:24
                                                • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:9
                                                  • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                                  • Time#minus_with_coercion $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:258
                                                    • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:259
                                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:260
                                                    • Time#minus_with_duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:245
                                                      • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                                      • Time#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                        • Integer#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                        • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                          • Integer#fdiv $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:5
                                                  • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:19
                                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:92
                                                  • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                    • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                      • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                        • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                  • String#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                  • String#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                • NilClass#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:31
                                                • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                                • Float#round $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:31
                                                • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:103
                                                  • NilClass#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:105
                                                  • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:106
                                                • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:64
                                                  • NilClass#blank? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:52
                                                  • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                    • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                                • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:72
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:74
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:78
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:80
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:82
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:84
                                                  • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:86
                                                • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                  • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                                • NilClass#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:45
                                                • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:92
                                                  • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                    • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                  • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                    • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                  • ActiveSupport::Logger#debug /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:490
                                                    • ActiveSupport::Logger#add -> block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                      • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                        • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                          • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                          • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                            • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                              • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                          • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                            • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                            • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                            • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                            • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                            • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                              • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                            • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                              • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                                • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                            • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                              • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                  • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                                • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                  • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                                • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                  • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                    • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                  • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                                        • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                          • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                          • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                            • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                              • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                          • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                            • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                            • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                            • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                            • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                            • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                              • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                            • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                              • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:20
                                                                • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:51
                                                                  • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:45
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                    • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                  • Array#any? $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:53
                                                                • NilClass#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:21
                                                                • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                                  • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                            • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                              • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                  • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                                • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                  • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                                • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                  • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                    • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                  • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                      • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                        • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                          • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:10
                                            • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
                                              • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_registry.rb:21
                      • Array#push $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:164
                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:232
                      • Student#block in with_transaction_returning_status $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:392
                        • Student#add_to_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:374
                          • Student#has_transactional_callbacks? $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:477
                            • Student#_rollback_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                              • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                  • Student._rollback_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                            • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                            • Student#_commit_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                              • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                  • Student._commit_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                            • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                            • Student#_before_commit_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                              • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                  • Student._before_commit_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                            • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                          • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:498
                            • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:502
                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:379
                          • Student.connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:90
                            • Student.retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:127
                              • Student.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:121
                                • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                  • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                    • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                  • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                              • Student.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                  • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                  • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                    • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:99
                              • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:880
                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:916
                                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:933
                                    • #<Class:Process>#pid $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:934
                                    • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                  • Concurrent::Map#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:118
                                    • Concurrent::Map#get_or_default $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:109
                                      • Hash#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:110
                                • ActiveRecord::ConnectionAdapters::ConnectionPool#connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:363
                                  • #<Class:Thread>#current $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:364
                                  • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:585
                                  • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                    • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                      • Kernel#hash $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:20
                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:256
                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#current_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:240
                              • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:215
                                • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:216
                          • Student#set_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:473
                          • Student#remember_transaction_record_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:413
                            • Student#__temp__e6f6 $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:34
                              • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                                • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                                • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                                  • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                    • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                  • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                            • Student#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:452
                              • Kernel#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:453
                            • Hash#reverse_merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:17
                              • Hash#merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:19
                                • Hash#block in reverse_merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:19
                                • Hash#block in reverse_merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:19
                                • Hash#block in reverse_merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:19
                        • Student#block (2 levels) in save $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:319
                          • Student#save $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:21
                            • Student#save $GemPath0/gems/activerecord-5.0.4/lib/active_record/validations.rb:43
                              • Student#perform_validations $GemPath0/gems/activerecord-5.0.4/lib/active_record/validations.rb:81
                                • Student#valid? $GemPath0/gems/activerecord-5.0.4/lib/active_record/validations.rb:63
                                  • Student#default_validation_context $GemPath0/gems/activerecord-5.0.4/lib/active_record/validations.rb:73
                                    • Student#new_record? $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:85
                                      • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:498
                                        • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:502
                                          • ActiveRecord::ConnectionAdapters::TransactionState#finalized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:10
                                  • Student#valid? $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:335
                                    • Student#errors $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:300
                                      • Class#new $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:301
                                        • ActiveModel::Errors#initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:72
                                          • ActiveModel::Errors#apply_default_array $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:544
                                            • Kernel#proc $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                            • Hash#default_proc= $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                              • Proc#to_proc $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                          • ActiveModel::Errors#apply_default_array $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:544
                                            • Kernel#proc $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                            • Hash#default_proc= $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                              • Proc#to_proc $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:545
                                    • ActiveModel::Errors#clear $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:101
                                      • Hash#clear $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:102
                                      • Hash#clear $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:103
                                    • Student#run_validations! $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations/callbacks.rb:112
                                      • Student#_run_validation_callbacks $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:749
                                        • Student#_validation_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                          • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                            • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                            • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                            • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                              • Student._validation_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                        • Student#__run_callbacks__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:95
                                          • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                                          • Kernel#block_given? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:97
                                          • Student#block in run_validations! $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations/callbacks.rb:113
                                            • Student#run_validations! $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:407
                                              • Student#_run_validate_callbacks $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:749
                                                • Student#_validate_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                  • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                                    • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                    • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                      • Student._validate_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student#__run_callbacks__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:95
                                                  • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                                                  • Kernel#block_given? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:97
                                              • Student#errors $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:300
                                              • ActiveModel::Errors#empty? $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:242
                                                • ActiveModel::Errors#size $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:216
                                                  • ActiveModel::Errors#values $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:225
                                                    • Hash#values $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:226
                                                  • Array#flatten $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:217
                                                • Numeric#zero? $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:243
                                  • Student#errors $GemPath0/gems/activemodel-5.0.4/lib/active_model/validations.rb:300
                                  • ActiveModel::Errors#empty? $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:242
                                    • ActiveModel::Errors#size $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:216
                                      • ActiveModel::Errors#values $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:225
                                        • Hash#values $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:226
                                      • Array#flatten $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:217
                                    • Numeric#zero? $GemPath0/gems/activemodel-5.0.4/lib/active_model/errors.rb:243
                              • Student#save $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:128
                                • Student#create_or_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/callbacks.rb:297
                                  • Student#_run_save_callbacks $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:749
                                    • Student#_save_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                      • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                        • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                        • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                        • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                          • Student._save_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                            • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                    • Student#__run_callbacks__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:95
                                      • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                                      • Kernel#block_given? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:97
                                      • Student#block in create_or_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/callbacks.rb:298
                                        • Student#create_or_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:546
                                          • Student#readonly? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:467
                                          • Student#new_record? $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:85
                                            • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:498
                                              • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:502
                                                • ActiveRecord::ConnectionAdapters::TransactionState#finalized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:10
                                          • Student#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:71
                                            • Student#should_record_timestamps? $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:84
                                              • Student#record_timestamps -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                  • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                                  • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                  • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                    • Student.record_timestamps -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                      • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                              • Student#partial_writes? -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                  • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                    • Student#partial_writes -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                      • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                        • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                                        • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                        • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                          • Student.partial_writes -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                            • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                              • Student#changed? $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:136
                                                • Student#changed_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:77
                                                  • Student#changed_attributes $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:175
                                                    • Class#new $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:176
                                                      • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                        • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                        • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                          • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                                          • Hash#each_pair $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                                        • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:69
                                                        • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
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                                                  • Student#mutation_tracker $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:103
                                                    • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:107
                                                      • ActiveRecord::AttributeMutationTracker#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:3
                                                  • ActiveRecord::AttributeMutationTracker#changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:7
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                                                      • ActiveRecord::AttributeSet#keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:32
                                                        • ActiveRecord::LazyAttributeHash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                                          • ActiveRecord::LazyAttributeHash#materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:105
                                                            • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:107
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                            • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                              • ActiveRecord::LazyAttributeHash#block in materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:108
                                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                            • Kernel#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:109
                                                          • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                                        • Enumerable#select $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
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                                                            • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
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                                                                  • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
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                                                              • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
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                                                              • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
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                                                              • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
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                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
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                                                                  • Hash#key $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                                    • Integer#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                          • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:109
                                                            • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                              • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                            • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                            • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:110
                                                  • ActiveSupport::HashWithIndifferentAccess#reverse_merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:235
                                                    • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:236
                                                    • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:236
                                                      • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                        • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                        • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                          • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                        • ActiveSupport::HashWithIndifferentAccess#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:287
                                                          • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                            • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                          • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                            • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                            • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                              • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                              • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                              • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                  • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                              • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                            • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                          • Hash#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                            • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                              • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                        • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                                        • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                                                    • ActiveSupport::HashWithIndifferentAccess#reverse_merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:12
                                                      • ActiveSupport::HashWithIndifferentAccess#merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:225
                                                        • ActiveSupport::HashWithIndifferentAccess#dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:216
                                                          • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                          • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                            • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                              • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                              • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                              • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                                • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                              • ActiveSupport::HashWithIndifferentAccess#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:287
                                                                • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                  • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                                  • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                                  • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                                    • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                                    • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                      • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                    • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                        • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                      • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                    • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                                  • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                                • Hash#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                  • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                    • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                              • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                                              • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                                                          • Kernel#tap $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                            • ActiveSupport::HashWithIndifferentAccess#block in dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                              • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                                • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                                • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                                  • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                                  • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                    • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                  • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                    • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                      • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                    • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                  • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                                • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                        • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                          • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                  • Kernel#freeze $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:83
                                                • ActiveSupport::HashWithIndifferentAccess#present? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:21
                                                  • Hash#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:22
                                            • Student#current_time_from_proper_timezone $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:120
                                              • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                              • Student.default_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                              • #<Class:Time>#now $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                                • Time#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                                  • Integer#+ $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                              • Time#utc $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                                • Integer#<=> $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                                • Integer#<=> $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:121
                                            • Student#timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:92
                                              • Student#timestamp_attributes_for_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:100
                                              • Array#select $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                • Student#block in timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Student.column_names $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:388
                                                  • Symbol#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                • Student#block in timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Student.column_names $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:388
                                                  • Symbol#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                                  • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:93
                                            • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:75
                                              • Student#block in _update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:75
                                                • Symbol#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/timestamp.rb:76
                                                • Student#attribute_changed? $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:180
                                                  • Student#changes_include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:110
                                                    • Student#changes_include? $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:204
                                                      • Student#changed_attributes $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:175
                                                      • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                        • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                          • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                        • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                    • Student#mutation_tracker $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:103
                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                      • ActiveRecord::Attribute::FromDatabase#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                        • ActiveRecord::Attribute::FromDatabase#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                        • ActiveRecord::Attribute::FromDatabase#changed_in_place? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:58
                                                          • ActiveRecord::Attribute::FromDatabase#has_been_read? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:95
                                                          • ActiveRecord::Attribute::FromDatabase#original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:126
                                                            • ActiveRecord::Attribute::FromDatabase#_original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:143
                                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#changed_in_place? -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                              • ActiveRecord::Type::DateTime#changed_in_place? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:83
                                                • Student#write_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/write.rb:31
                                                  • Student#write_attribute_with_type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/write.rb:45
                                                    • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/write.rb:46
                                                    • ActiveRecord::AttributeSet#write_from_user $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:52
                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                      • ActiveRecord::Attribute::FromDatabase#with_value_from_user $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:66
                                                        • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#assert_valid_value -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                            • ActiveRecord::Type::DateTime#assert_valid_value -> block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:14
                                                              • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:14
                                                                • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:15
                                                                • ActiveRecord::Type::DateTime#assert_valid_value $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:103
                                                        • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:68
                                                        • ActiveRecord::Attribute::FromDatabase.from_user $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:8
                                                          • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:9
                                                            • ActiveRecord::Attribute::FromUser#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                                      • ActiveRecord::LazyAttributeHash#[]= $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:45
                                                        • Kernel#frozen? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:46
                                            • Student#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/callbacks.rb:305
                                              • Student#_run_update_callbacks $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:749
                                                • Student#_update_callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                  • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                                    • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                    • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                      • Student._update_callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student#__run_callbacks__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:95
                                                  • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:480
                                                  • Kernel#block_given? $GemPath0/gems/activesupport-5.0.4/lib/active_support/callbacks.rb:97
                                                  • Student#block in _update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/callbacks.rb:306
                                                    • Student#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:118
                                                      • Student#partial_writes? -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                        • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                          • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:119
                                                            • Student#partial_writes -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                              • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:110
                                                                • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:111
                                                                • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                                • Kernel#public_send $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:114
                                                                  • Student.partial_writes -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                      • Student#keys_for_partial_write $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:126
                                                        • Student#changed $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:145
                                                          • Student#changed_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:77
                                                            • Student#changed_attributes $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:175
                                                            • Student#mutation_tracker $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:103
                                                            • ActiveRecord::AttributeMutationTracker#changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:7
                                                              • ActiveRecord::AttributeMutationTracker#attr_names $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:43
                                                                • ActiveRecord::AttributeSet#keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:32
                                                                  • ActiveRecord::LazyAttributeHash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                                                    • ActiveRecord::LazyAttributeHash#materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:105
                                                                    • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                                                  • Enumerable#select $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                    • Enumerator#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                      • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                        • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                          • ActiveRecord::Attribute::FromDatabase#initialized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:87
                                                                        • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                          • ActiveRecord::Attribute::FromDatabase#initialized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:87
                                                                        • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                          • ActiveRecord::Attribute::FromDatabase#initialized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:87
                                                                        • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                          • ActiveRecord::Attribute::FromUser#initialized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:87
                                                                        • ActiveRecord::AttributeSet#block in keys $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:33
                                                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                          • ActiveRecord::Attribute::FromUser#initialized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:87
                                                              • Hash#with_indifferent_access $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/indifferent_access.rb:8
                                                                • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/indifferent_access.rb:9
                                                                  • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                                    • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                                    • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                                    • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                                      • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                                                      • Hash#each_pair $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                                                    • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:69
                                                                    • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                                                    • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                                                              • Enumerable#each_with_object $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                  • ActiveRecord::AttributeMutationTracker#block in changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                      • ActiveRecord::Attribute::FromDatabase#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_in_place? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:58
                                                                          • ActiveRecord::Attribute::FromDatabase#has_been_read? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:95
                                                                          • ActiveRecord::Attribute::FromDatabase#original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:126
                                                                            • ActiveRecord::Attribute::FromDatabase#_original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:143
                                                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                          • ActiveModel::Type::String#changed_in_place? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:6
                                                                            • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:7
                                                                  • ActiveRecord::AttributeMutationTracker#block in changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                      • ActiveRecord::Attribute::FromDatabase#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_in_place? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:58
                                                                          • ActiveRecord::Attribute::FromDatabase#has_been_read? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:95
                                                                          • ActiveRecord::Attribute::FromDatabase#original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:126
                                                                            • ActiveRecord::Attribute::FromDatabase#_original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:143
                                                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                          • ActiveModel::Type::String#changed_in_place? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:6
                                                                            • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:7
                                                                  • ActiveRecord::AttributeMutationTracker#block in changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                      • ActiveRecord::Attribute::FromDatabase#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                        • ActiveRecord::Attribute::FromDatabase#changed_in_place? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:58
                                                                          • ActiveRecord::Attribute::FromDatabase#has_been_read? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:95
                                                                          • ActiveRecord::Attribute::FromDatabase#original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:126
                                                                            • ActiveRecord::Attribute::FromDatabase#_original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:143
                                                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#changed_in_place? -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                              • ActiveRecord::Type::DateTime#changed_in_place? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:83
                                                                  • ActiveRecord::AttributeMutationTracker#block in changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                      • ActiveRecord::Attribute::FromUser#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                        • ActiveRecord::Attribute::FromUser#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                          • ActiveRecord::Attribute::FromUser#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                            • ActiveRecord::Attribute::FromDatabase#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                              • ActiveRecord::Attribute::FromDatabase#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:139
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#deserialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:7
                                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#deserialize -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                    • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                      • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                                      • ActiveRecord::Type::DateTime#deserialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:21
                                                                                        • ActiveRecord::Type::DateTime#cast -> block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                          • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                            • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:7
                                                                                            • ActiveRecord::Type::DateTime#cast $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:35
                                                                                              • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:36
                                                                                              • ActiveRecord::Type::DateTime#cast_value $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/date_time.rb:15
                                                                                                • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/date_time.rb:16
                                                                                                • ActiveRecord::Type::DateTime#fast_string_to_time $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:68
                                                                                                  • String#=~ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:69
                                                                                                  • String#to_r $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                                    • Integer#div $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                                    • Integer#div $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                                  • Rational#* $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                                  • Rational#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                                  • ActiveRecord::Type::DateTime#new_time $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:50
                                                                                                    • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:52
                                                                                                    • ActiveRecord::Type::DateTime#default_timezone $GemPath0/gems/activerecord-5.0.4/lib/active_record/type/internal/timezone.rb:9
                                                                                                      • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                                    • Kernel#public_send $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                      • #<Class:Time>#utc $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                        • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#convert_time_to_time_zone $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:29
                                                                                    • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:30
                                                                                    • Time#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                                                      • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                      • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                      • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                    • Time.zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:12
                                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                                      • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                                    • Time#in_time_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:18
                                                                                      • Time.find_zone! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:80
                                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:81
                                                                                      • Time#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                                                        • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                        • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                      • Time#time_with_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:31
                                                                                        • Time#utc? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                        • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                          • ActiveSupport::TimeWithZone#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:51
                                                                                            • ActiveSupport::TimeWithZone#transfer_time_values_to_utc_constructor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:492
                                                                                              • Time#year $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#month $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#day $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#hour $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#min $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#sec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#subsec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#to_r $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#coerce $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • #<Class:Time>#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Numeric#divmod $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Numeric#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                          • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                            • ActiveRecord::Attribute::FromUser#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:149
                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:11
                                                                                • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:12
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter.const_missing /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:56
                                                                                  • Module#const_get /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:57
                                                                                • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:14
                                                                                • Kernel#respond_to? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:16
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#method_missing /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:78
                                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                                  • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:82
                                                                                  • ActiveRecord::Type::DateTime#user_input_in_time_zone $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:44
                                                                                    • Time.zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:12
                                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                                      • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                                    • Time#in_time_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:18
                                                                                      • Time.find_zone! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:80
                                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:81
                                                                                      • Time#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                                                        • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                        • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                      • Time#time_with_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:31
                                                                                        • Time#utc? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                        • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                          • ActiveSupport::TimeWithZone#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:51
                                                                                            • ActiveSupport::TimeWithZone#transfer_time_values_to_utc_constructor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:492
                                                                                              • Time#year $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#month $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#day $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#hour $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#min $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#sec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Time#subsec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#to_r $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#coerce $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • #<Class:Time>#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Numeric#divmod $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Numeric#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                    • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                  • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Rational#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                                • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#cast -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                    • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                                    • ActiveRecord::Type::DateTime#cast -> block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                      • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                        • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                                        • ActiveRecord::Type::DateTime#cast $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:35
                                                                                          • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:36
                                                                                          • ActiveRecord::Type::DateTime#cast_value $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/date_time.rb:15
                                                                                            • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                                            • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:33
                                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#changed? -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                              • ActiveRecord::Type::DateTime#changed? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:62
                                                                                • BasicObject#!= $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:63
                                                                                  • Comparable#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:63
                                                                                    • ActiveSupport::TimeWithZone#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:223
                                                                                      • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:63
                                                                                      • Time#compare_with_coercion $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:267
                                                                                        • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:269
                                                                                        • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                                        • ActiveSupport::TimeWithZone#to_time $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:417
                                                                                          • ActiveSupport::TimeWithZone#preserve_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                                                          • ActiveSupport::TimeWithZone#utc_offset $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:111
                                                                                            • ActiveSupport::TimeWithZone#period $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:72
                                                                                              • ActiveSupport::TimeZone#period_for_utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/values/time_zone.rb:432
                                                                                                • TZInfo::DataTimezone#period_for_utc $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/data_timezone.rb:13
                                                                                                  • TZInfo::DataTimezone#info $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/info_timezone.rb:22
                                                                                                  • TZInfo::ZoneinfoTimezoneInfo#period_for_utc $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/transition_data_timezone_info.rb:79
                                                                                                    • Class#new $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/transition_data_timezone_info.rb:115
                                                                                                      • TZInfo::TimezonePeriod#initialize $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/timezone_period.rb:21
                                                                                            • TZInfo::TimezonePeriod#utc_total_offset $GemPath0/gems/tzinfo-1.2.3/lib/tzinfo/timezone_period.rb:62
                                                                                          • ActiveSupport::TimeWithZone#localtime $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:83
                                                                                            • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:63
                                                                                            • Time#getlocal $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:84
                                                                                              • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:84
                                                                                              • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:84
                                                                                        • Time#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:272
                                                                                          • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:272
                                                                    • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                      • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                    • ActiveRecord::Attribute::FromUser#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                      • ActiveRecord::Attribute::FromDatabase#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                        • ActiveRecord::Attribute::FromDatabase#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:139
                                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#deserialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:7
                                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#deserialize -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                                • ActiveRecord::Type::DateTime#deserialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:21
                                                                                  • ActiveRecord::Type::DateTime#cast -> block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                    • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                                      • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/accepts_multiparameter_time.rb:7
                                                                                      • ActiveRecord::Type::DateTime#cast $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:35
                                                                                        • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:36
                                                                                        • ActiveRecord::Type::DateTime#cast_value $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/date_time.rb:15
                                                                                          • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/date_time.rb:16
                                                                                          • ActiveRecord::Type::DateTime#fast_string_to_time $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:68
                                                                                            • String#=~ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:69
                                                                                            • String#to_r $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                              • Integer#div $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                              • Integer#div $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                            • Rational#* $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                            • Rational#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:70
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • String#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:71
                                                                                            • ActiveRecord::Type::DateTime#new_time $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:50
                                                                                              • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:52
                                                                                              • ActiveRecord::Type::DateTime#default_timezone $GemPath0/gems/activerecord-5.0.4/lib/active_record/type/internal/timezone.rb:9
                                                                                                • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                              • Kernel#public_send $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                • #<Class:Time>#utc $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#+ $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                                                  • Integer#<=> $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:61
                                                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#convert_time_to_time_zone $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:29
                                                                              • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/time_zone_conversion.rb:30
                                                                              • Time#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                                                • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                              • Time.zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:12
                                                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                                • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:13
                                                                              • Time#in_time_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:18
                                                                                • Time.find_zone! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:80
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/zones.rb:81
                                                                                • Time#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                                                  • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                  • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                                                • Time#time_with_zone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:31
                                                                                  • Time#utc? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                  • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                                    • ActiveSupport::TimeWithZone#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:51
                                                                                      • ActiveSupport::TimeWithZone#transfer_time_values_to_utc_constructor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:492
                                                                                        • Time#year $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#month $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#day $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#hour $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#min $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#sec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Time#subsec $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Integer#to_r $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Integer#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Rational#coerce $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Rational#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                        • #<Class:Time>#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Numeric#divmod $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Numeric#div $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                              • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Integer#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Rational#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Integer#== $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Rational#/ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                            • Rational#floor $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Rational#* $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                                          • Integer#<=> $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:493
                                                                    • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:109
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                        • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                        • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                        • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                      • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:110
                                                                  • ActiveRecord::AttributeMutationTracker#block in changed_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:8
                                                                    • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                      • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                        • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                      • ActiveRecord::Attribute::FromUser#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                        • ActiveRecord::Attribute::FromUser#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                          • ActiveRecord::Attribute::FromUser#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                            • ActiveRecord::Attribute::FromDatabase#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                              • ActiveRecord::Attribute::FromDatabase#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:139
                                                                                • ActiveRecord::Enum::EnumType#deserialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:128
                                                                                  • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:129
                                                                                  • ActiveModel::Type::Integer#deserialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:19
                                                                                    • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:20
                                                                                    • Integer#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:21
                                                                                  • Hash#key $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                                                    • Integer#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                                          • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                          • ActiveRecord::Enum::EnumType#changed? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:62
                                                                    • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                      • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                    • ActiveRecord::Attribute::FromUser#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                      • ActiveRecord::Attribute::FromDatabase#original_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:42
                                                                        • ActiveRecord::Attribute::FromDatabase#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:139
                                                                          • ActiveRecord::Enum::EnumType#deserialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:128
                                                                            • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:129
                                                                            • ActiveModel::Type::Integer#deserialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:19
                                                                              • Kernel#nil? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:20
                                                                              • Integer#to_i $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/integer.rb:21
                                                                            • Hash#key $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                                              • Integer#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:130
                                                                    • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:109
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                        • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                                      • ActiveSupport::HashWithIndifferentAccess#[]= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:110
                                                            • ActiveSupport::HashWithIndifferentAccess#reverse_merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:235
                                                              • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:236
                                                              • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:236
                                                                • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                                  • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                                  • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                                    • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                                  • ActiveSupport::HashWithIndifferentAccess#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:287
                                                                    • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                      • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                    • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                                      • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                                      • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                                        • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                                        • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                          • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                        • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                          • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                            • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                          • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                        • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                                      • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                                    • Hash#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                      • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                        • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                          • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                          • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                      • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                        • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                                  • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                                                  • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                                                              • ActiveSupport::HashWithIndifferentAccess#reverse_merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/reverse_merge.rb:12
                                                                • ActiveSupport::HashWithIndifferentAccess#merge $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:225
                                                                  • ActiveSupport::HashWithIndifferentAccess#dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:216
                                                                    • Kernel#class $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                                    • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                                      • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                                                        • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                                                        • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                                          • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                                        • ActiveSupport::HashWithIndifferentAccess#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:287
                                                                          • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                            • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:288
                                                                          • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                                            • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                                            • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                                              • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                                              • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                                • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                              • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                                • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                                  • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                                • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                              • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                                            • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                                          • Hash#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                            • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                              • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                                • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                                • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:431
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:432
                                                                            • ActiveSupport::HashWithIndifferentAccess#block in to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:291
                                                                              • ActiveSupport::HashWithIndifferentAccess#convert_value $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:302
                                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:303
                                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:309
                                                                        • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                                                        • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                                                                    • Kernel#tap $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                                      • ActiveSupport::HashWithIndifferentAccess#block in dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:217
                                                                        • ActiveSupport::HashWithIndifferentAccess#set_defaults $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:319
                                                                          • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:320
                                                                          • ActiveSupport::HashWithIndifferentAccess#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:77
                                                                            • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:78
                                                                            • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                              • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                            • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                              • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                                • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                              • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                            • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:83
                                                                          • Hash#default= $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:323
                                                                  • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                                                    • Hash#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:142
                                                            • Kernel#freeze $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:83
                                                          • Hash#keys $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:146
                                                        • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:127
                                                        • Student.column_names $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:388
                                                        • Array#& $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:127
                                                      • Student#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/locking/optimistic.rb:78
                                                        • Student#locking_enabled? $GemPath0/gems/activerecord-5.0.4/lib/active_record/locking/optimistic.rb:58
                                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/locking/optimistic.rb:59
                                                          • Student.locking_enabled? $GemPath0/gems/activerecord-5.0.4/lib/active_record/locking/optimistic.rb:141
                                                            • Student.lock_optimistically -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                              • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                            • Student.columns_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:342
                                                              • Student.load_schema $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:450
                                                                • Student.schema_loaded? $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:446
                                                            • Student.locking_column $GemPath0/gems/activerecord-5.0.4/lib/active_record/locking/optimistic.rb:152
                                                        • Student#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:554
                                                          • Student#arel_attributes_with_values_for_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:410
                                                            • Student#attributes_for_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:434
                                                              • Array#reject $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:435
                                                                • Student#block in attributes_for_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:435
                                                                  • Student#readonly_attribute? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:448
                                                                    • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:449
                                                                    • Student.readonly_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/readonly_attributes.rb:18
                                                                      • Student._attr_readonly -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                    • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:449
                                                                • Student#block in attributes_for_update $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:435
                                                                  • Student#readonly_attribute? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:448
                                                                    • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:449
                                                                    • Student.readonly_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/readonly_attributes.rb:18
                                                                      • Student._attr_readonly -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                    • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:449
                                                            • Student#arel_attributes_with_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:423
                                                              • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:425
                                                              • Student.arel_table $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:253
                                                              • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:427
                                                                • Student#block in arel_attributes_with_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:427
                                                                  • Arel::Table#[] $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:80
                                                                    • #<Class:#<Class:0x007fa570687b18>>#new $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                      • Struct#initialize $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                  • Student#typecasted_attribute_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:456
                                                                    • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                                                                      • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                                                                        • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                          • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                        • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                  • Struct#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                                    • Kernel#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                                    • Arel::Table#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:84
                                                                      • String#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:88
                                                                    • String#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                                • Student#block in arel_attributes_with_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:427
                                                                  • Arel::Table#[] $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:80
                                                                    • #<Class:#<Class:0x007fa570687b18>>#new $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                      • Struct#initialize $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                  • Student#typecasted_attribute_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:456
                                                                    • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                                                                      • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                                                                      • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                                                                        • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                          • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                        • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                  • Struct#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                                    • Kernel#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                                    • Arel::Table#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:84
                                                                      • String#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:88
                                                                    • String#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods.rb:428
                                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:559
                                                          • Student.unscoped $GemPath0/gems/activerecord-5.0.4/lib/active_record/scoping/default.rb:34
                                                            • Kernel#block_given? $GemPath0/gems/activerecord-5.0.4/lib/active_record/scoping/default.rb:35
                                                            • Student.relation $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:289
                                                              • Student.arel_table $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:253
                                                              • Student.predicate_builder $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:272
                                                              • ActiveRecord::Relation.create $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:100
                                                                • ActiveRecord::Relation.relation_class_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:106
                                                                  • Student.relation_delegate_class $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:6
                                                                    • Kernel#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:7
                                                                • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:101
                                                                  • Student::ActiveRecord_Relation#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:24
                                                              • Student.finder_needs_type_condition? $GemPath0/gems/activerecord-5.0.4/lib/active_record/inheritance.rb:81
                                                          • Student#__temp__e6f6 $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:34
                                                            • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                                                              • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                                                              • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                                                                • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                  • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                          • Student#id_was $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/primary_key.rb:43
                                                            • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:498
                                                              • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:502
                                                                • ActiveRecord::ConnectionAdapters::TransactionState#finalized? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:10
                                                            • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/primary_key.rb:45
                                                            • Student.primary_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/primary_key.rb:72
                                                            • Student#attribute_was $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:187
                                                              • Student#attribute_changed? $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:180
                                                                • Student#changes_include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:110
                                                                  • Student#changes_include? $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:204
                                                                    • Student#changed_attributes $GemPath0/gems/activemodel-5.0.4/lib/active_model/dirty.rb:175
                                                                    • ActiveSupport::HashWithIndifferentAccess#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:162
                                                                      • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                                        • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                      • Hash#key? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:163
                                                                  • Student#mutation_tracker $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:103
                                                                  • ActiveRecord::AttributeMutationTracker#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:23
                                                                    • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_mutation_tracker.rb:24
                                                                    • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                      • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                    • ActiveRecord::Attribute::FromDatabase#changed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:54
                                                                      • ActiveRecord::Attribute::FromDatabase#changed_from_assignment? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:122
                                                                      • ActiveRecord::Attribute::FromDatabase#changed_in_place? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:58
                                                                        • ActiveRecord::Attribute::FromDatabase#has_been_read? $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:95
                                                                        • ActiveRecord::Attribute::FromDatabase#original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:126
                                                                          • ActiveRecord::Attribute::FromDatabase#_original_value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:143
                                                                        • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                        • ActiveModel::Type::String#changed_in_place? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:6
                                                                          • Kernel#is_a? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/string.rb:7
                                                              • Student#__temp__e6f6 $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:34
                                                                • Student#_read_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:65
                                                                  • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/read.rb:66
                                                                  • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:43
                                                                    • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:11
                                                                      • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:41
                                                                    • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                          • Student::ActiveRecord_Relation#_update_record $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:74
                                                            • Student::ActiveRecord_Relation#substitute_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:96
                                                              • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:100
                                                                • Student::ActiveRecord_Relation#block in substitute_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:100
                                                                  • #<Class:0x007fa570687b18>#name $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • #<Class:0x007fa570687b18>#name $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • Student.type_for_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:368
                                                                    • Student.attribute_types $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:352
                                                                      • Student.load_schema $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:450
                                                                        • Student.schema_loaded? $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:446
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                    • ActiveRecord::Relation::QueryAttribute#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                                                  • Array#push $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                                    • BasicObject#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                                  • Array#push $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                                • Student::ActiveRecord_Relation#block in substitute_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:100
                                                                  • #<Class:0x007fa570687b18>#name $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • #<Class:0x007fa570687b18>#name $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • Student.type_for_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:368
                                                                    • Student.attribute_types $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:352
                                                                      • Student.load_schema $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:450
                                                                        • Student.schema_loaded? $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:446
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                    • ActiveRecord::Relation::QueryAttribute#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                                                  • Array#push $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:101
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                                    • BasicObject#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                                  • Array#push $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:102
                                                            • Student.unscoped $GemPath0/gems/activerecord-5.0.4/lib/active_record/scoping/default.rb:34
                                                              • Kernel#block_given? $GemPath0/gems/activerecord-5.0.4/lib/active_record/scoping/default.rb:35
                                                              • Student.relation $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:289
                                                                • Student.arel_table $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:253
                                                                • Student.predicate_builder $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:272
                                                                • ActiveRecord::Relation.create $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:100
                                                                  • ActiveRecord::Relation.relation_class_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:106
                                                                    • Student.relation_delegate_class $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:6
                                                                      • Kernel#hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:7
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:101
                                                                    • Student::ActiveRecord_Relation#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:24
                                                                • Student.finder_needs_type_condition? $GemPath0/gems/activerecord-5.0.4/lib/active_record/inheritance.rb:81
                                                            • Student.finder_needs_type_condition? $GemPath0/gems/activerecord-5.0.4/lib/active_record/inheritance.rb:81
                                                            • Student.primary_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/primary_key.rb:72
                                                            • Student::ActiveRecord_Relation#where $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:619
                                                              • Hash#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:622
                                                              • Student::ActiveRecord_Relation#spawn $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/spawn_methods.rb:9
                                                                • Kernel#clone $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/spawn_methods.rb:10
                                                                  • Kernel#initialize_clone $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/spawn_methods.rb:10
                                                                    • Student::ActiveRecord_Relation#initialize_copy $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:33
                                                                      • #<Class:Hash>#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:36
                                                                      • Student::ActiveRecord_Relation#reset $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:594
                                                                        • Kernel#freeze $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation.rb:597
                                                              • Student::ActiveRecord_Relation#where! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:629
                                                                • Student::ActiveRecord_Relation#sanitize_for_mass_assignment $GemPath0/gems/activemodel-5.0.4/lib/active_model/forbidden_attributes_protection.rb:19
                                                                  • Kernel#respond_to? $GemPath0/gems/activemodel-5.0.4/lib/active_model/forbidden_attributes_protection.rb:20
                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:631
                                                                • ActiveRecord::PredicateBuilder.references $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:49
                                                                  • Enumerable#map $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:50
                                                                    • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:50
                                                                      • ActiveRecord::PredicateBuilder.block in references $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:50
                                                                        • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:51
                                                                        • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:54
                                                                        • String#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:55
                                                                  • Array#compact $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:57
                                                                • Student::ActiveRecord_Relation#references! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:224
                                                                  • Array#flatten! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:225
                                                                  • Array#map! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:226
                                                                  • Student::ActiveRecord_Relation#references_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                  • Array#| $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:228
                                                                  • Student::ActiveRecord_Relation#references_values= $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:64
                                                                    • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:954
                                                                • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                  • Student::ActiveRecord_Relation#new_where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1224
                                                                    • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:83
                                                                • Student::ActiveRecord_Relation#where_clause_factory $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1229
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1230
                                                                    • ActiveRecord::Relation::WhereClauseFactory#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:4
                                                                • ActiveRecord::Relation::WhereClauseFactory#build $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:9
                                                                  • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:13
                                                                  • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:13
                                                                  • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:15
                                                                  • ActiveRecord::PredicateBuilder#resolve_column_aliases $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:12
                                                                    • ActiveRecord::TableMetadata#resolve_column_aliases $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:12
                                                                      • #<Class:Hash>#[] $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:15
                                                                      • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:16
                                                                        • ActiveRecord::TableMetadata#block in resolve_column_aliases $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:16
                                                                          • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:17
                                                                  • Student.expand_hash_conditions_for_aggregates $GemPath0/gems/activerecord-5.0.4/lib/active_record/sanitization.rb:93
                                                                    • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/sanitization.rb:95
                                                                      • Student.block in expand_hash_conditions_for_aggregates $GemPath0/gems/activerecord-5.0.4/lib/active_record/sanitization.rb:95
                                                                        • String#to_sym $GemPath0/gems/activerecord-5.0.4/lib/active_record/sanitization.rb:96
                                                                        • Student.reflect_on_aggregation $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:61
                                                                          • Student.aggregate_reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                            • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                          • Symbol#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:62
                                                                  • Hash#stringify_keys! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:43
                                                                    • Hash#transform_keys! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:23
                                                                      • Kernel#block_given? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:24
                                                                      • Hash#keys $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:25
                                                                      • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:25
                                                                        • Hash#block in transform_keys! $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:25
                                                                          • String#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:26
                                                                          • Hash#delete $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/hash/keys.rb:26
                                                                  • ActiveRecord::PredicateBuilder#create_binds $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:34
                                                                    • ActiveRecord::PredicateBuilder#convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:138
                                                                      • Hash#select $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:139
                                                                        • ActiveRecord::PredicateBuilder#block in convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:139
                                                                          • String#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:140
                                                                      • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:143
                                                                    • ActiveRecord::PredicateBuilder#create_binds_for_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:96
                                                                      • Kernel#dup $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:97
                                                                        • Kernel#initialize_dup $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:97
                                                                          • Hash#initialize_copy $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:97
                                                                      • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:100
                                                                        • ActiveRecord::PredicateBuilder#block in create_binds_for_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:100
                                                                          • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:102
                                                                          • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:106
                                                                          • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:108
                                                                          • ActiveRecord::PredicateBuilder#can_be_bound? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:158
                                                                            • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:159
                                                                            • ActiveRecord::PredicateBuilder#handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:154
                                                                              • Enumerable#detect $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • ActiveRecord::Base.=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:244
                                                                                      • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:245
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                              • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                            • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:160
                                                                            • ActiveRecord::TableMetadata#associated_with? $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:40
                                                                              • Student._reflect_on_association $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:113
                                                                                • Student._reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                  • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:114
                                                                          • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:123
                                                                            • BasicObject#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:123
                                                                          • ActiveRecord::PredicateBuilder#build_bind_param $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:164
                                                                            • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:165
                                                                            • ActiveRecord::TableMetadata#type $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:32
                                                                              • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:34
                                                                              • Student.type_for_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:368
                                                                                • Student.attribute_types $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:352
                                                                                  • Student.load_schema $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:450
                                                                                    • Student.schema_loaded? $GemPath0/gems/activerecord-5.0.4/lib/active_record/model_schema.rb:446
                                                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:165
                                                                              • ActiveRecord::Relation::QueryAttribute#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                                                  • ActiveRecord::PredicateBuilder#build_from_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:29
                                                                    • ActiveRecord::PredicateBuilder#convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:138
                                                                      • Hash#select $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:139
                                                                        • ActiveRecord::PredicateBuilder#block in convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:139
                                                                          • String#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:140
                                                                      • Hash#each_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:143
                                                                    • ActiveRecord::PredicateBuilder#expand_from_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:83
                                                                      • Enumerable#flat_map $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:86
                                                                        • Hash#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:86
                                                                          • ActiveRecord::PredicateBuilder#block in expand_from_hash $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:86
                                                                            • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:87
                                                                            • ActiveRecord::PredicateBuilder#expand $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:39
                                                                              • ActiveRecord::TableMetadata#associated_with? $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:40
                                                                                • Student._reflect_on_association $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:113
                                                                                  • Student._reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                  • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/reflection.rb:114
                                                                              • ActiveRecord::TableMetadata#arel_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/table_metadata.rb:24
                                                                                • Student.arel_attribute $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:267
                                                                                  • Student.attribute_alias? $GemPath0/gems/activemodel-5.0.4/lib/active_model/attribute_methods.rb:218
                                                                                    • Student.attribute_aliases -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                      • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                                    • String#to_s $GemPath0/gems/activemodel-5.0.4/lib/active_model/attribute_methods.rb:219
                                                                                    • Hash#key? $GemPath0/gems/activemodel-5.0.4/lib/active_model/attribute_methods.rb:219
                                                                                  • Arel::Table#[] $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:80
                                                                                    • #<Class:#<Class:0x007fa570687b18>>#new $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                                      • Struct#initialize $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                              • ActiveRecord::PredicateBuilder#build $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:75
                                                                                • ActiveRecord::PredicateBuilder#handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:154
                                                                                  • Enumerable#detect $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                    • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • ActiveRecord::Base.=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:244
                                                                                          • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:245
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                      • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                        • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                  • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder.rb:155
                                                                                • ActiveRecord::PredicateBuilder::BasicObjectHandler#call $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/predicate_builder/basic_object_handler.rb:8
                                                                                  • Arel::Attributes::Attribute#eq $GemPath0/gems/arel-7.1.4/lib/arel/predications.rb:15
                                                                                    • Arel::Attributes::Attribute#quoted_node $GemPath0/gems/arel-7.1.4/lib/arel/predications.rb:223
                                                                                      • Arel::Nodes.build_quoted $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:30
                                                                                        • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                                    • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/predications.rb:16
                                                                                      • Arel::Nodes::Equality#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:6
                                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:7
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause_factory.rb:30
                                                                    • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:8
                                                                • ActiveRecord::Relation::WhereClause#+ $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:13
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:14
                                                                    • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:8
                                                                • Student::ActiveRecord_Relation#where_clause= $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:94
                                                                  • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:954
                                                            • Student::ActiveRecord_Relation#bound_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:101
                                                              • Student::ActiveRecord_Relation#limit_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                              • Student::ActiveRecord_Relation#offset_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                              • Student::ActiveRecord_Relation#connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/delegation.rb:43
                                                                • Student.connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:90
                                                                  • Student.retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:127
                                                                    • Student.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:121
                                                                      • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                                                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                          • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                      • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                    • Student.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                      • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                                                      • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                        • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                                                        • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                          • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:99
                                                                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:880
                                                                      • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:916
                                                                        • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:933
                                                                          • #<Class:Process>#pid $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:934
                                                                          • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                            • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                        • Concurrent::Map#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:118
                                                                          • Concurrent::Map#get_or_default $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:109
                                                                            • Hash#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:110
                                                                      • ActiveRecord::ConnectionAdapters::ConnectionPool#connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:363
                                                                        • #<Class:Thread>#current $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:364
                                                                        • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:585
                                                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                          • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                            • Kernel#hash $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:20
                                                              • Student::ActiveRecord_Relation#from_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                • Student::ActiveRecord_Relation#new_from_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1234
                                                                  • ActiveRecord::Relation::FromClause.empty $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:27
                                                              • ActiveRecord::Relation::FromClause#binds $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:11
                                                                • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:12
                                                              • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:948
                                                                • Student::ActiveRecord_Relation#build_arel $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:959
                                                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:960
                                                                    • Arel::SelectManager#initialize $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:9
                                                                      • Arel::SelectManager#initialize $GemPath0/gems/arel-7.1.4/lib/arel/tree_manager.rb:11
                                                                      • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:11
                                                                        • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_statement.rb:7
                                                                          • Arel::Nodes::SelectCore#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_core.rb:7
                                                                            • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_core.rb:8
                                                                            • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_core.rb:9
                                                                              • Arel::Nodes::JoinSource#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/join_source.rb:9
                                                                                • Arel::Nodes::JoinSource#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:6
                                                                                  • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:7
                                                                        • Arel::Nodes::SelectStatement#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_statement.rb:7
                                                                          • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/select_statement.rb:8
                                                                      • Array#last $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:12
                                                                      • Arel::SelectManager#from $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:87
                                                                        • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:88
                                                                        • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:91
                                                                  • Student::ActiveRecord_Relation#joins_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                  • Student::ActiveRecord_Relation#left_outer_joins_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                  • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                  • ActiveRecord::Relation::WhereClause#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:6
                                                                    • Array#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:6
                                                                  • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                  • ActiveRecord::Relation::WhereClause#ast $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:69
                                                                    • ActiveRecord::Relation::WhereClause#predicates_with_wrapped_sql_literals $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:151
                                                                      • ActiveRecord::Relation::WhereClause#non_empty_predicates $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:162
                                                                        • Array#- $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:163
                                                                          • Arel::Nodes::Equality#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:18
                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                            • Array#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                              • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                              • Struct#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                                • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                                • Arel::Table#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:84
                                                                                  • String#hash $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:88
                                                                                • String#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                              • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:19
                                                                      • Array#map $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:152
                                                                        • ActiveRecord::Relation::WhereClause#block in predicates_with_wrapped_sql_literals $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:152
                                                                          • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:153
                                                                    • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:70
                                                                      • Arel::Nodes::And#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/and.rb:6
                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/and.rb:7
                                                                  • Arel::SelectManager#where $GemPath0/gems/arel-7.1.4/lib/arel/tree_manager.rb:33
                                                                    • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/tree_manager.rb:34
                                                                  • Student::ActiveRecord_Relation#having_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                    • Student::ActiveRecord_Relation#new_where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1224
                                                                      • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:83
                                                                  • ActiveRecord::Relation::WhereClause#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:6
                                                                    • Array#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:6
                                                                  • Student::ActiveRecord_Relation#limit_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                                  • Student::ActiveRecord_Relation#offset_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                                  • Student::ActiveRecord_Relation#group_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                  • Student::ActiveRecord_Relation#build_order $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1150
                                                                    • Student::ActiveRecord_Relation#order_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                    • Array#uniq $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1151
                                                                    • Array#reject! $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1152
                                                                  • Student::ActiveRecord_Relation#build_select $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1096
                                                                    • Student::ActiveRecord_Relation#select_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:60
                                                                    • Array#any? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1097
                                                                    • Student.arel_table $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:253
                                                                    • Arel.star $GemPath0/gems/arel-7.1.4/lib/arel.rb:30
                                                                      • Arel.sql $GemPath0/gems/arel-7.1.4/lib/arel.rb:26
                                                                        • Class#new $GemPath0/gems/arel-7.1.4/lib/arel.rb:27
                                                                          • String#initialize $GemPath0/gems/arel-7.1.4/lib/arel.rb:27
                                                                    • Arel::Table#[] $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:80
                                                                      • #<Class:#<Class:0x007fa570687b18>>#new $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                        • Struct#initialize $GemPath0/gems/arel-7.1.4/lib/arel/table.rb:81
                                                                    • Arel::SelectManager#project $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:132
                                                                      • Array#map $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:135
                                                                        • Arel::SelectManager#block in project $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:135
                                                                          • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:136
                                                                          • Array#include? $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:136
                                                                      • Array#concat $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:135
                                                                  • Student::ActiveRecord_Relation#distinct_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                                  • Arel::SelectManager#distinct $GemPath0/gems/arel-7.1.4/lib/arel/select_manager.rb:149
                                                                  • Student::ActiveRecord_Relation#from_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                    • Student::ActiveRecord_Relation#new_from_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1234
                                                                      • ActiveRecord::Relation::FromClause.empty $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:27
                                                                  • ActiveRecord::Relation::FromClause#empty? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:23
                                                                    • NilClass#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/from_clause.rb:24
                                                                  • Student::ActiveRecord_Relation#lock_value $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:73
                                                              • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                              • Student::ActiveRecord_Relation#having_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:90
                                                                • Student::ActiveRecord_Relation#new_where_clause $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:1224
                                                                  • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/where_clause.rb:83
                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#combine_bind_parameters $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:480
                                                            • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_methods.rb:948
                                                            • Student.primary_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/primary_key.rb:72
                                                            • Arel::SelectManager#compile_update $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:5
                                                              • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:6
                                                                • Arel::UpdateManager#initialize $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:3
                                                                  • Arel::UpdateManager#initialize $GemPath0/gems/arel-7.1.4/lib/arel/tree_manager.rb:11
                                                                  • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:5
                                                                    • Arel::Nodes::UpdateStatement#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/update_statement.rb:7
                                                              • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:8
                                                              • Array#first $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:11
                                                              • Array#first $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:11
                                                              • #<Class:0x007fa570687b18>#relation $GemPath0/gems/arel-7.1.4/lib/arel/crud.rb:11
                                                              • Arel::UpdateManager#key= $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:14
                                                                • Arel::Nodes.build_quoted $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:30
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:32
                                                                  • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:36
                                                                  • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/nodes/casted.rb:39
                                                                    • Arel::Nodes::Quoted#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:7
                                                                      • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:8
                                                              • Arel::UpdateManager#table $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:29
                                                              • Arel::UpdateManager#set $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:43
                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:44
                                                                • Array#map $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:47
                                                                  • Arel::UpdateManager#block in set $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:47
                                                                    • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:49
                                                                      • Arel::Nodes::UnqualifiedColumn#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:7
                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:8
                                                                    • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:48
                                                                      • Arel::Nodes::Assignment#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:6
                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:7
                                                                  • Arel::UpdateManager#block in set $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:47
                                                                    • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:49
                                                                      • Arel::Nodes::UnqualifiedColumn#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:7
                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unary.rb:8
                                                                    • Class#new $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:48
                                                                      • Arel::Nodes::Assignment#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:6
                                                                        • BasicObject#initialize $GemPath0/gems/arel-7.1.4/lib/arel/nodes/binary.rb:7
                                                              • Arel::UpdateManager#order $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:22
                                                              • Arel::UpdateManager#wheres= $GemPath0/gems/arel-7.1.4/lib/arel/update_manager.rb:34
                                                            • Student.connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:90
                                                              • Student.retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:127
                                                                • Student.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/core.rb:121
                                                                  • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                      • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                  • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/class/attribute.rb:90
                                                                • Student.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                  • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                                                  • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                    • Class#superclass $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:100
                                                                    • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:98
                                                                      • Kernel#nil? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_handling.rb:99
                                                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:880
                                                                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:916
                                                                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:933
                                                                      • #<Class:Process>#pid $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:934
                                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                    • Concurrent::Map#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:118
                                                                      • Concurrent::Map#get_or_default $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:109
                                                                        • Hash#fetch $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:110
                                                                  • ActiveRecord::ConnectionAdapters::ConnectionPool#connection $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:363
                                                                    • #<Class:Thread>#current $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:364
                                                                    • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:585
                                                                    • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                        • Kernel#hash $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:20
                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#update $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/query_cache.rb:15
                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#update $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:132
                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#to_sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:10
                                                                  • Kernel#respond_to? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/database_statements.rb:11
                                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#collector $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:144
                                                                    • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:146
                                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#initialize $GemPath0/gems/arel-7.1.4/lib/arel/collectors/sql_string.rb:8
                                                                        • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#initialize $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:4
                                                                  • Arel::Visitors::SQLite#accept $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb:6
                                                                    • Arel::Visitors::SQLite#accept $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:6
                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                        • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                        • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                        • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:15
                                                                          • Module#name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                          • String#gsub $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                          • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                        • Arel::Visitors::SQLite#visit_Arel_Nodes_UpdateStatement $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:105
                                                                          • NilClass#nil? $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:106
                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                          • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                            • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                            • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                            • Arel::Visitors::SQLite#visit_Arel_Table $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:607
                                                                              • Arel::Visitors::SQLite#quote_table_name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:803
                                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:804
                                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_table_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:90
                                                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                          • Arel::Visitors::SQLite#inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:819
                                                                            • Enumerable#each_with_index $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                            • Enumerable#inject $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                              • Enumerator#each $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                • Enumerable#each_with_index $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                  • Array#each $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                    • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                        • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                        • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                        • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:15
                                                                                          • Module#name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                          • String#gsub $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                          • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                        • Arel::Visitors::SQLite#visit_Arel_Nodes_Assignment $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:646
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                            • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:15
                                                                                              • Module#name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                              • String#gsub $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                              • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
                                                                                            • Arel::Visitors::SQLite#visit_Arel_Nodes_UnqualifiedColumn $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:720
                                                                                              • Arel::Nodes::UnqualifiedColumn#name $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unqualified_column.rb:15
                                                                                                • #<Class:0x007fa570687b18>#name $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unqualified_column.rb:16
                                                                                              • Arel::Visitors::SQLite#quote_column_name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:808
                                                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:809
                                                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:85
                                                                                                    • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:86
                                                                                                  • String#gsub $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:14
                                                                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                          • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                            • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Arel::Visitors::SQLite#visit_Arel_Nodes_BindParam $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:738
                                                                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#add_bind $GemPath0/gems/arel-7.1.4/lib/arel/collectors/sql_string.rb:13
                                                                                                • Arel::Visitors::SQLite#block in visit_Arel_Nodes_BindParam $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:739
                                                                                                • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                    • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                        • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                        • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                        • Arel::Visitors::SQLite#visit_Arel_Nodes_Assignment $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:646
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:648
                                                                                          • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                            • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Arel::Visitors::SQLite#visit_Arel_Nodes_UnqualifiedColumn $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:720
                                                                                              • Arel::Nodes::UnqualifiedColumn#name $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unqualified_column.rb:15
                                                                                                • #<Class:0x007fa570687b18>#name $GemPath0/gems/arel-7.1.4/lib/arel/nodes/unqualified_column.rb:16
                                                                                              • Arel::Visitors::SQLite#quote_column_name $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:808
                                                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:809
                                                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:85
                                                                                                    • String#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:86
                                                                                                  • String#gsub $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:14
                                                                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                                          • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                            • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                            • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                            • Arel::Visitors::SQLite#visit_Arel_Nodes_BindParam $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:738
                                                                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#add_bind $GemPath0/gems/arel-7.1.4/lib/arel/collectors/sql_string.rb:13
                                                                                                • Arel::Visitors::SQLite#block in visit_Arel_Nodes_BindParam $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:739
                                                                                                • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-7.1.4/lib/arel/collectors/plain_string.rb:12
                                                                          • Arel::Visitors::SQLite#inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:819
                                                                            • Enumerable#each_with_index $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                            • Enumerable#inject $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                              • Enumerator#each $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                • Enumerable#each_with_index $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                  • Array#each $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                    • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:12
                                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:24
                                                                                        • Kernel#class $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
                                                                                        • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/reduce.rb:13
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                                                                                          • Kernel#hash $GemPath0/gems/arel-7.1.4/lib/arel/visitors/visitor.rb:16
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                                                                                            • Enumerable#each_with_index $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                            • Enumerable#inject $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
                                                                                              • Enumerator#each $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
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                                                                                                    • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:821
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                                                                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:804
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                                                                                                                • Module#=== $GemPath0/gems/arel-7.1.4/lib/arel/visitors/to_sql.rb:809
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                                                                      • Array#map $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:162
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                                                                          • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_attribute.rb:10
                                                                            • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                                                              • ActiveRecord::Relation::QueryAttribute#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
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                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#serialize -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
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                                                                                      • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
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                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:33
                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:35
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                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • TrueClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                • FalseClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:197
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:198
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:199
                                                                                • Time.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:15
                                                                                  • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:16
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                                                                                    • Time#strftime $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/conversions.rb:51
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                                                                                  • Time#usec $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:143
                                                                                  • Time#usec $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:144
                                                                                  • Kernel#sprintf $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:144
                                                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in type_casted_binds $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:162
                                                                          • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_attribute.rb:10
                                                                            • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                                                              • ActiveRecord::Relation::QueryAttribute#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
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                                                                                    • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                                                                  • Hash#fetch $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:195
                                                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:29
                                                                            • Kernel#respond_to? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:30
                                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:31
                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:33
                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:35
                                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:190
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • TrueClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                • FalseClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:197
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:198
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:199
                                                                                • Time.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:15
                                                                                  • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:16
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:16
                                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#types_which_need_no_typecasting $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:168
                                                                                • NilClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in type_casted_binds $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:162
                                                                          • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_attribute.rb:10
                                                                            • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                                                              • ActiveRecord::Relation::QueryAttribute#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                                                                • ActiveRecord::Relation::QueryAttribute#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/relation/query_attribute.rb:6
                                                                              • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:8
                                                                                • Module#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:10
                                                                                • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                                                                • TrueClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                                                                  • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                                                                • FalseClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                                                                  • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                                                                • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:43
                                                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:29
                                                                            • Kernel#respond_to? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:30
                                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:31
                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:33
                                                                              • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:35
                                                                              • String#encoding $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3/quoting.rb:36
                                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:190
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                                                • TrueClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:194
                                                                                • FalseClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:195
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:197
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:198
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:199
                                                                                • Time.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:15
                                                                                  • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:16
                                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:16
                                                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#types_which_need_no_typecasting $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:168
                                                                                • NilClass#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                                  • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                                • Module#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:582
                                                                      • Kernel#object_id $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                                                                      • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:17
                                                                        • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:32
                                                                          • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:41
                                                                            • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:53
                                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                                • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                            • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                                                              • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                                                                • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                                                                  • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:78
                                                                                    • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                                                      • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                    • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:80
                                                                                      • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                                                        • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                                                          • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                                                      • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                                                        • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:56
                                                                                          • Kernel#dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                                                            • Kernel#initialize_dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                                                              • Hash#initialize_copy $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                                                      • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                                                        • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                          • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                                                                      • Array#last $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:82
                                                                                      • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                                                        • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                          • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                                                                      • Array#push $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:85
                                                                              • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                                                                • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                                                                  • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:6
                                                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                                                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in exec_query $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:193
                                                                            • SQLite3::Database#prepare $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:90
                                                                              • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                                                                • SQLite3::Statement#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                                                              • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:92
                                                                            • SQLite3::Statement#columns $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:101
                                                                              • SQLite3::Statement#get_metadata $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:135
                                                                                • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                                                • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                                                  • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                                                • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                                                • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                                                  • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#without_prepared_statement? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:600
                                                                            • SQLite3::Statement#bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:35
                                                                              • Array#flatten $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                                                              • Array#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                                                                • SQLite3::Statement#block in bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                                                                  • Module#=== $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:38
                                                                                  • SQLite3::Statement#bind_param $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:41
                                                                                • SQLite3::Statement#block in bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                                                                  • Module#=== $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:38
                                                                                  • SQLite3::Statement#bind_param $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:41
                                                                                • SQLite3::Statement#block in bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                                                                  • Module#=== $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:38
                                                                                  • SQLite3::Statement#bind_param $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:41
                                                                            • Enumerable#to_a $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:202
                                                                              • SQLite3::Statement#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:106
                                                                                • Kernel#loop $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                                                  • SQLite3::Statement#block in each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                                                    • SQLite3::Statement#step $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                                                      • SQLite3::Database#encoding $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                                                    • SQLite3::Statement#done? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:109
                                                                            • SQLite3::Statement#close $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:204
                                                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:217
                                                                              • ActiveRecord::Result#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/result.rb:39
                                                                        • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:41
                                                                          • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:45
                                                                            • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                                                              • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                                                                • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                                                                  • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:82
                                                                                    • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                                                      • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                    • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:88
                                                                                      • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                                                        • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                                                          • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                                                      • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                                                                        • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                          • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                                                                      • Array#pop $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:90
                                                                                      • Hash#merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:92
                                                                                      • String#split $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                                                                      • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                                                                      • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:23
                                                                                        • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:24
                                                                                        • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:9
                                                                                          • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                                                                            • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                              • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                                                                          • Time#minus_with_coercion $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:258
                                                                                            • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:259
                                                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:260
                                                                                            • Time#minus_with_duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:245
                                                                                              • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                                                                              • Time#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                                                                • Integer#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                                                                • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                                                                  • Integer#fdiv $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                                                        • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:5
                                                                                          • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:19
                                                                                            • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                              • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                                                          • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                        • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:92
                                                                                          • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                                                            • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                                                              • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                                • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                                                • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                                        • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                                                        • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                                                                        • Float#round $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:31
                                                                                        • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:103
                                                                                          • NilClass#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:105
                                                                                          • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:106
                                                                                        • ActiveRecord::LogSubscriber#type_casted_binds $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:50
                                                                                        • Array#zip $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:37
                                                                                        • Array#map $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:37
                                                                                          • ActiveRecord::LogSubscriber#block in sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:37
                                                                                            • ActiveRecord::LogSubscriber#render_bind $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:54
                                                                                              • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:55
                                                                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#binary? -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                                • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                                                                                  • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                                                                                  • ActiveRecord::Type::DateTime#binary? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:55
                                                                                          • ActiveRecord::LogSubscriber#block in sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:37
                                                                                            • ActiveRecord::LogSubscriber#render_bind $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:54
                                                                                              • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:55
                                                                                              • ActiveRecord::Enum::EnumType#binary? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:55
                                                                                          • ActiveRecord::LogSubscriber#block in sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:37
                                                                                            • ActiveRecord::LogSubscriber#render_bind $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:54
                                                                                              • Kernel#is_a? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:55
                                                                                              • ActiveModel::Type::String#binary? $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:55
                                                                                        • Array#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                          • Array#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • String#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • String#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                          • Array#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • String#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • Integer#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                          • Array#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • String#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                            • String#inspect $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:39
                                                                                        • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:64
                                                                                          • String#blank? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:114
                                                                                            • Regexp#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:118
                                                                                          • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                                                            • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                                                                        • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:72
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:74
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:78
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:80
                                                                                          • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:82
                                                                                        • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                                                          • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                                                                        • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:92
                                                                                          • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                                                            • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                          • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                                                            • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                                                          • ActiveSupport::Logger#debug /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:490
                                                                                            • ActiveSupport::Logger#add -> block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                                                              • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                                                                • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                                                                  • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                                                                  • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                                                                    • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                                                                      • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                                        • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                                                  • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                                                                    • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                                                                    • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                                                                    • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                                                                    • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                                                                    • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                      • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                        • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                    • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                                                                      • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                                                                        • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                                                                    • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                                                                      • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                                                        • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                                                          • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                                                          • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                                                          • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                                                                        • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                                                          • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                                                                        • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                                                          • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                                                            • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                                                          • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                                                                                • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                                                                  • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                                                                  • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                                                                    • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                                                                      • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                                        • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                                                                        • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                                                                  • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                                                                    • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                                                                    • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                                                                    • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                                                                    • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                                                                    • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                      • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                        • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                                                                    • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                                                                      • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:20
                                                                                                        • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:51
                                                                                                          • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:45
                                                                                                            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                                                            • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                                                          • Array#any? $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:53
                                                                                                        • NilClass#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:21
                                                                                                        • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                                                                          • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                                                                    • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                                                                      • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                                                        • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                                                          • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                                                          • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                                                          • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                                                                        • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                                                          • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                                                                        • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                                                          • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                                                            • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                                                          • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                                                              • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                                                                • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                                                                  • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:10
                                                                                    • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
                                                                                      • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                        • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                                                      • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_registry.rb:21
                                                                  • SQLite3::Database#changes $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:223
                                                          • Kernel#block_given? $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:562
                                          • BasicObject#!= $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:549
                                            • Integer#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:549
                                              • BasicObject#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/persistence.rb:549
                            • Student#changes_applied $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:52
                              • Student#mutation_tracker $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:103
                              • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:54
                                • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:64
                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:65
                                  • Hash#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:66
                                  • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:140
                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:141
                                    • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                    • Hash#each_pair $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:144
                                  • Hash#to_hash $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:69
                                  • Hash#default $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:70
                                  • Hash#default_proc $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:71
                              • Student#store_original_attributes $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_methods/dirty.rb:130
                                • ActiveRecord::AttributeSet#map $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:91
                                  • ActiveRecord::LazyAttributeHash#transform_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                    • ActiveRecord::LazyAttributeHash#materialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:105
                                    • Hash#transform_values $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set/builder.rb:26
                                      • ActiveRecord::Attribute::FromDatabase#forgetting_assignment $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:62
                                        • ActiveRecord::Attribute::FromDatabase#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                          • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:8
                                            • Module#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:10
                                            • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                            • TrueClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                              • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                            • FalseClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                              • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                            • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:43
                                        • ActiveRecord::Attribute::FromDatabase#with_value_from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:71
                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:72
                                          • ActiveRecord::Attribute::FromDatabase.from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:4
                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:5
                                              • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                      • ActiveRecord::Attribute::FromDatabase#forgetting_assignment $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:62
                                        • ActiveRecord::Attribute::FromDatabase#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                          • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:8
                                            • Module#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:10
                                            • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                            • TrueClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                              • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:11
                                            • FalseClass#=== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                              • BasicObject#== $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/immutable_string.rb:12
                                            • ActiveModel::Type::String#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/value.rb:43
                                        • ActiveRecord::Attribute::FromDatabase#with_value_from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:71
                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:72
                                          • ActiveRecord::Attribute::FromDatabase.from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:4
                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:5
                                              • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                      • ActiveRecord::Attribute::FromDatabase#forgetting_assignment $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:62
                                        • ActiveRecord::Attribute::FromDatabase#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#serialize -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                              • ActiveRecord::Type::DateTime#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:7
                                                • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:33
                                                • ActiveSupport::TimeWithZone#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                  • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                  • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                  • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:457
                                                    • Symbol#to_sym $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:459
                                                    • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:460
                                                • ActiveRecord::Type::DateTime#is_utc? $GemPath0/gems/activerecord-5.0.4/lib/active_record/type/internal/timezone.rb:5
                                                  • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:457
                                                  • Symbol#to_sym $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:459
                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:460
                                                • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:63
                                        • ActiveRecord::Attribute::FromDatabase#with_value_from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:71
                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:72
                                          • ActiveRecord::Attribute::FromDatabase.from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:4
                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:5
                                              • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                      • ActiveRecord::Attribute::FromUser#forgetting_assignment $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:62
                                        • ActiveRecord::Attribute::FromUser#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                          • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#serialize -> block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                            • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#block in delegating_block /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:339
                                              • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#__getobj__ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/delegate.rb:384
                                              • ActiveRecord::Type::DateTime#serialize $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:7
                                                • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.0.4/lib/active_model/type/helpers/time_value.rb:33
                                                • ActiveSupport::TimeWithZone#acts_like? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:7
                                                  • Symbol#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                  • String#intern $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/acts_like.rb:8
                                                  • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:457
                                                    • Symbol#to_sym $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:459
                                                    • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:460
                                                • ActiveRecord::Type::DateTime#is_utc? $GemPath0/gems/activerecord-5.0.4/lib/active_record/type/internal/timezone.rb:5
                                                  • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:457
                                                  • Symbol#to_sym $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:459
                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:460
                                                • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.0.4/lib/active_support/time_with_zone.rb:63
                                        • ActiveRecord::Attribute::FromUser#with_value_from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:71
                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:72
                                          • ActiveRecord::Attribute::FromUser.from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:4
                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:5
                                              • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                      • ActiveRecord::Attribute::FromUser#forgetting_assignment $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:62
                                        • ActiveRecord::Attribute::FromUser#value_for_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:50
                                          • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:36
                                          • ActiveRecord::Enum::EnumType#serialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/enum.rb:133
                                            • ActiveSupport::HashWithIndifferentAccess#fetch $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:194
                                              • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:298
                                                • Kernel#kind_of? $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:299
                                              • Hash#fetch $GemPath0/gems/activesupport-5.0.4/lib/active_support/hash_with_indifferent_access.rb:195
                                        • ActiveRecord::Attribute::FromUser#with_value_from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:71
                                          • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:72
                                          • ActiveRecord::Attribute::FromUser.from_database $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:4
                                            • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:5
                                              • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute.rb:29
                                  • Class#new $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:93
                                    • ActiveRecord::AttributeSet#initialize $GemPath0/gems/activerecord-5.0.4/lib/active_record/attribute_set.rb:7
                    • #<Class:Thread>#current $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:198
                    • Thread#status $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:198
                    • ActiveRecord::ConnectionAdapters::TransactionManager#commit_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:168
                      • Array#last $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:169
                      • ActiveRecord::ConnectionAdapters::RealTransaction#before_commit_records $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:79
                        • Array#uniq $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:80
                        • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:80
                      • Array#pop $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:174
                      • ActiveRecord::ConnectionAdapters::RealTransaction#commit $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:142
                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#commit_db_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:239
                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:582
                            • Kernel#object_id $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                            • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:17
                              • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:32
                                • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:41
                                  • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:53
                                    • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                  • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                    • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                      • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                        • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:78
                                          • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                            • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                          • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:80
                                            • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                              • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                            • Class#new $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:81
                                              • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:56
                                                • Kernel#dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                  • Kernel#initialize_dup $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                                    • Hash#initialize_copy $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:58
                                            • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                              • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                            • Array#last $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:82
                                            • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                              • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                            • Array#push $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:85
                                    • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:42
                                      • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:97
                                        • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:6
                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract_adapter.rb:590
                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in commit_db_transaction $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:240
                                  • SQLite3::Database#commit $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:517
                                    • SQLite3::Database#execute $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:122
                                      • Kernel#nil? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:123
                                      • SQLite3::Database#prepare $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:90
                                        • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                          • SQLite3::Statement#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:91
                                        • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:92
                                        • SQLite3::Database#block in execute $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:137
                                          • SQLite3::Statement#bind_params $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:35
                                            • Array#flatten $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                            • Array#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:37
                                          • SQLite3::Statement#columns $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:101
                                            • SQLite3::Statement#get_metadata $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:135
                                              • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                              • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                                • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:136
                                              • SQLite3::Statement#column_count $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                              • Class#new $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                                • Array#initialize $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:139
                                          • Kernel#block_given? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:142
                                          • Enumerable#map $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:152
                                            • SQLite3::Statement#each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:106
                                              • Kernel#loop $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                • SQLite3::Statement#block in each $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:107
                                                  • SQLite3::Statement#step $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                    • SQLite3::Database#encoding $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:108
                                                  • SQLite3::Statement#done? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/statement.rb:109
                                        • SQLite3::Statement#closed? $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:97
                                        • SQLite3::Statement#close $GemPath0/gems/sqlite3-1.3.13/lib/sqlite3/database.rb:97
                              • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:41
                                • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:45
                                  • Array#each $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                    • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                      • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                        • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:82
                                          • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                            • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                          • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:88
                                            • #<Class:Time>#now $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                              • Time#initialize $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                                • Integer#+ $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:89
                                            • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:100
                                              • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:116
                                            • Array#pop $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:90
                                            • Hash#merge! $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:92
                                            • String#split $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                            • Array#first $GemPath0/gems/activesupport-5.0.4/lib/active_support/subscriber.rb:94
                                            • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:23
                                              • Kernel#class $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:24
                                              • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:9
                                                • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:18
                                                  • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                    • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                                • Time#minus_with_coercion $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:258
                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:259
                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:260
                                                  • Time#minus_with_duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:245
                                                    • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:43
                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/duration.rb:44
                                                    • Time#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                      • Integer#- $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                      • Numeric#quo $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                                        • Integer#fdiv $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/time/calculations.rb:249
                                              • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:5
                                                • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.0.4/lib/active_record/runtime_registry.rb:19
                                                  • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                                    • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                              • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:92
                                                • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                  • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                    • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                      • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                    • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                      • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                              • Array#include? $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                • String#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                                • String#== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:29
                                              • NilClass#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:31
                                              • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/instrumenter.rb:78
                                              • Float#round $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:31
                                              • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:103
                                                • NilClass#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:105
                                                • Float#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/numeric/conversions.rb:106
                                              • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:64
                                                • NilClass#blank? $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/object/blank.rb:52
                                                • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                  • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                              • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:72
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:74
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:76
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:78
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:80
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:82
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:84
                                                • Regexp#=== $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:86
                                              • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:102
                                                • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:67
                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:104
                                              • NilClass#to_s $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:45
                                              • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.0.4/lib/active_support/log_subscriber.rb:92
                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.0.4/lib/active_record/log_subscriber.rb:93
                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.0.4/lib/active_support/core_ext/module/attribute_accessors.rb:60
                                                • ActiveSupport::Logger#debug /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:490
                                                  • ActiveSupport::Logger#add -> block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                    • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:24
                                                      • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                        • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                        • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                          • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                            • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                              • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                            • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                        • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                          • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                          • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                          • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                          • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                            • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                              • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                          • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                            • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                              • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                          • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                            • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                              • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                              • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                              • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                                      • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:85
                                                        • Kernel#nil? $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:86
                                                        • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:27
                                                          • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:15
                                                            • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:11
                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                              • BasicObject#__id__ $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger_thread_safe_level.rb:12
                                                            • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/map.rb:92
                                                              • Concurrent::Map#[] $GemPath0/gems/concurrent-ruby-1.0.5/lib/concurrent/collection/map/non_concurrent_map_backend.rb:19
                                                        • ActiveSupport::Logger#add /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:455
                                                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:457
                                                          • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:461
                                                          • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:462
                                                          • ActiveSupport::Logger#format_severity /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:577
                                                          • #<Class:Time>#now /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                            • Time#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                              • Integer#+ /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:470
                                                          • ActiveSupport::Logger#format_message /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:581
                                                            • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:20
                                                              • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:51
                                                                • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:45
                                                                  • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                  • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:48
                                                                • Array#any? $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:53
                                                              • NilClass#to_s $GemPath0/gems/activesupport-5.0.4/lib/active_support/tagged_logging.rb:21
                                                              • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:101
                                                                • Module#=== $GemPath0/gems/activesupport-5.0.4/lib/active_support/logger.rb:102
                                                          • Logger::LogDevice#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:684
                                                            • Logger::LogDevice#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                              • Logger::LogDevice#mon_enter /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:185
                                                                • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:186
                                                                • Thread::Mutex#lock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:187
                                                                • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:188
                                                              • Logger::LogDevice#block in write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:686
                                                                • IO#write /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/logger.rb:695
                                                              • Logger::LogDevice#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                • Logger::LogDevice#mon_check_owner /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:247
                                                                  • #<Class:Thread>#current /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:248
                                                                • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                    • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:46
                                      • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.0.4/lib/active_support/notifications/fanout.rb:101
                                        • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_subscriber.rb:10
                                          • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:53
                                            • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:44
                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                              • Thread#[] $GemPath0/gems/activesupport-5.0.4/lib/active_support/per_thread_registry.rb:45
                                            • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.0.4/lib/active_record/explain_registry.rb:21
                        • ActiveRecord::ConnectionAdapters::RealTransaction#commit $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:75
                          • ActiveRecord::ConnectionAdapters::TransactionState#set_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:26
                            • Set#include? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:232
                      • ActiveRecord::ConnectionAdapters::RealTransaction#commit_records $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:83
                        • Array#uniq $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:84
                        • Array#shift $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:85
                        • Array#each $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:94
              • ActiveRecord::ConnectionAdapters::TransactionState#committed? $GemPath0/gems/activerecord-5.0.4/lib/active_record/connection_adapters/abstract/transaction.rb:14
              • Student#clear_transaction_record_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:424
          • Student#clear_transaction_record_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:424
            • Student#force_clear_transaction_record_state $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:430
              • Hash#clear $GemPath0/gems/activerecord-5.0.4/lib/active_record/transactions.rb:431