• Object#block in <main> (pry):3
    • Student#touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:52
      • Student#no_touching? $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:44
        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:45
        • ActiveRecord::NoTouching.applied_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:34
          • ActiveRecord::NoTouching.klasses $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:39
            • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:40
            • Thread#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:40
            • Thread#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:40
          • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/no_touching.rb:35
      • Student#touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/touch_later.rb:33
        • Student#has_defer_touch_attrs? $GemPath0/gems/activerecord-5.1.2/lib/active_record/touch_later.rb:54
        • Student#touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:316
          • Student#with_transaction_returning_status $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:379
            • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:381
            • Student.transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:209
              • Student.connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:87
                • Student.retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:115
                  • Student.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:141
                    • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                      • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                    • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                      • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                  • Student.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                    • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                    • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                      • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                      • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                        • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:95
                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:928
                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:958
                      • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:977
                        • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:978
                        • 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-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:373
                      • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:374
                      • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:615
                      • 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-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:218
                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#current_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:233
                  • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:222
                    • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:223
                • ActiveRecord::ConnectionAdapters::NullTransaction#joinable? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:39
                • ActiveRecord::ConnectionAdapters::TransactionManager#within_new_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:190
                  • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                    • Monitor#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
                    • ActiveRecord::ConnectionAdapters::TransactionManager#block in within_new_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:191
                      • ActiveRecord::ConnectionAdapters::TransactionManager#begin_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:151
                        • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                          • Monitor#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
                          • ActiveRecord::ConnectionAdapters::TransactionManager#block in begin_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:152
                            • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:222
                              • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:223
                            • ActiveRecord::ConnectionAdapters::NullTransaction#joinable? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:39
                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:156
                              • ActiveRecord::ConnectionAdapters::RealTransaction#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:125
                                • ActiveRecord::ConnectionAdapters::RealTransaction#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:47
                                  • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:49
                                    • ActiveRecord::ConnectionAdapters::TransactionState#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:6
                                  • Hash#fetch $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:51
                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#begin_db_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:256
                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:602
                                    • Kernel#object_id $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                    • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:17
                                      • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:32
                                        • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:41
                                          • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:42
                                            • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                              • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                                • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:78
                                                  • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                    • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                  • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:84
                                                    • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                      • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                        • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                    • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                      • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:56
                                                        • Kernel#dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                          • Kernel#initialize_dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                            • Hash#initialize_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                    • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                      • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                    • Array#last $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:86
                                                    • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                      • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                    • Array#push $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:89
                                            • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                              • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                                • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:6
                                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                        • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                          • Monitor#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
                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block (2 levels) in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:611
                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in begin_db_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:257
                                              • 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
                                          • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                            • Monitor#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
                                      • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:41
                                        • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:45
                                          • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                            • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                              • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                                • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:82
                                                  • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                    • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                  • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:92
                                                    • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                      • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                        • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                    • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                      • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                    • Array#pop $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:94
                                                    • Hash#merge! $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:96
                                                    • String#split $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                    • Array#first $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                    • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:18
                                                      • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:19
                                                      • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:9
                                                        • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                          • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                            • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                        • Time#minus_with_coercion $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:276
                                                          • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:277
                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:278
                                                          • Time#minus_with_duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:263
                                                            • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:135
                                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:136
                                                            • Time#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                              • Integer#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                              • Numeric#quo $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                                • Integer#fdiv $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                      • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:5
                                                        • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:19
                                                          • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                            • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                        • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                      • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:92
                                                        • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                          • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                            • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                              • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_record/log_subscriber.rb:24
                                                        • String#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:24
                                                        • String#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:24
                                                      • NilClass#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:26
                                                      • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                      • Float#round $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:26
                                                      • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:102
                                                        • NilClass#=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:104
                                                        • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:105
                                                      • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:60
                                                        • NilClass#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:54
                                                        • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                          • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                          • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                      • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:68
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:70
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:74
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:76
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:78
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:80
                                                        • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:82
                                                      • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                        • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                      • NilClass#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:41
                                                      • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:94
                                                        • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                          • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                        • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                          • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                        • 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-5.1.2/lib/active_support/logger.rb:24
                                                            • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:24
                                                              • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:85
                                                                • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                                • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                  • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                    • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                      • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:101
                                                                      • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:85
                                                                • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                                • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                  • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                    • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                      • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/tagged_logging.rb:20
                                                                      • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:51
                                                                        • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:45
                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                          • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                        • Array#any? $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:53
                                                                      • NilClass#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:21
                                                                      • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:101
                                                                        • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:46
                                              • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                                • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:10
                                                  • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:53
                                                    • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_registry.rb:21
                            • Array#push $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:162
                          • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                            • Monitor#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
                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:225
                        • Student#block in with_transaction_returning_status $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:381
                          • Student#add_to_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:363
                            • Student#has_transactional_callbacks? $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:465
                              • Student#_rollback_callbacks $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:836
                                • Student#__callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                  • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:111
                                    • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                    • Kernel#public_send $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                      • Student.__callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                              • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:534
                              • Student#_commit_callbacks $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:836
                                • Student#__callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                  • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:111
                                    • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                    • Kernel#public_send $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                      • Student.__callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                              • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:534
                              • Student#_before_commit_callbacks $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:836
                                • Student#__callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                  • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                    • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:111
                                    • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                    • Kernel#public_send $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                      • Student.__callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                        • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                              • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:534
                            • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:486
                              • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:490
                            • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:368
                            • Student.connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:87
                              • Student.retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:115
                                • Student.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:141
                                  • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                  • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                • Student.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                  • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                  • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                    • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                    • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                      • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:95
                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:928
                                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:958
                                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:977
                                      • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:978
                                      • 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-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:373
                                    • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:374
                                    • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:615
                                    • 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-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:249
                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#current_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:233
                                • ActiveRecord::ConnectionAdapters::TransactionManager#current_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:222
                                  • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:223
                            • Student#set_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:461
                            • Student#remember_transaction_record_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:402
                              • Student#id $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/primary_key.rb:17
                                • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/primary_key.rb:18
                                • Student.primary_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/primary_key.rb:73
                                • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:486
                                  • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:490
                                    • ActiveRecord::ConnectionAdapters::TransactionState#finalized? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:10
                                • Student#_read_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/read.rb:70
                                  • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/read.rb:71
                                  • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:44
                                    • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:12
                                      • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:41
                                    • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                              • Student#frozen? $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:468
                                • Kernel#frozen? $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:469
                              • Hash#reverse_merge! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/reverse_merge.rb:17
                                • Hash#merge! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/reverse_merge.rb:19
                          • Student#block in touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:317
                            • Student#touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/callbacks.rb:329
                              • Student#_run_touch_callbacks $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:824
                                • Student#run_callbacks $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:93
                                  • Student#__callbacks -> block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                    • Student#block (2 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:110
                                      • Kernel#instance_variable_defined? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:111
                                      • Kernel#class $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                      • Kernel#public_send $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:114
                                        • Student.__callbacks -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                          • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                  • Symbol#to_sym $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:94
                                  • ActiveSupport::Callbacks::CallbackChain#empty? $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:534
                                  • Kernel#block_given? $GemPath0/gems/activesupport-5.1.2/lib/active_support/callbacks.rb:97
                                  • Student#block in touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/callbacks.rb:330
                                    • Student#touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:504
                                      • Student#persisted? $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:98
                                        • Student#sync_with_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:486
                                          • Student#update_attributes_from_transaction_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:490
                                            • ActiveRecord::ConnectionAdapters::TransactionState#finalized? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:10
                                      • Student#current_time_from_proper_timezone $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:126
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:127
                                        • Student.current_time_from_proper_timezone $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:77
                                          • Student.default_timezone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                          • #<Class:Time>#now $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                            • Time#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                              • Integer#+ $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                          • Time#utc $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                            • Integer#<=> $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                            • Integer#<=> $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:78
                                      • Student#timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:118
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:119
                                        • Student.timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:61
                                          • Student.timestamp_attributes_for_update $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:73
                                          • Array#select $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:62
                                            • Student.block in timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:62
                                              • Student.column_names $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:392
                                              • Array#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:62
                                            • Student.block in timestamp_attributes_for_update_in_model $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:62
                                              • Student.column_names $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:392
                                              • Array#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/timestamp.rb:62
                                      • Array#concat $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:514
                                      • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:519
                                        • Student#block in touch $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:519
                                          • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:520
                                          • Student#write_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/write.rb:31
                                            • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/write.rb:32
                                            • Student.attribute_alias? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:218
                                              • Student.attribute_aliases -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                              • String#to_s $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                              • Hash#key? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                            • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/write.rb:35
                                            • ActiveRecord::AttributeSet#write_from_user $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:53
                                              • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:12
                                                • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:41
                                              • ActiveRecord::Attribute::FromDatabase#with_value_from_user $GemPath0/gems/activerecord-5.1.2/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-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:14
                                                      • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:14
                                                        • Kernel#is_a? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:15
                                                        • ActiveRecord::Type::DateTime#assert_valid_value $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:103
                                                • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:68
                                                • ActiveRecord::Attribute::FromDatabase.from_user $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:8
                                                  • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:9
                                                    • ActiveRecord::Attribute::FromUser#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:29
                                              • ActiveRecord::LazyAttributeHash#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:45
                                                • Kernel#frozen? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:46
                                      • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:524
                                      • Student.primary_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/primary_key.rb:73
                                      • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:525
                                      • Student.unscoped $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/default.rb:34
                                        • Kernel#block_given? $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/default.rb:35
                                        • Student.relation $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:307
                                          • Student.arel_table $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:271
                                          • Student.predicate_builder $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:290
                                          • ActiveRecord::Relation.create $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:101
                                            • ActiveRecord::Relation.relation_class_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:107
                                              • Student.relation_delegate_class $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:4
                                                • Kernel#hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:5
                                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:102
                                              • Student::ActiveRecord_Relation#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:22
                                          • Student.finder_needs_type_condition? $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:82
                                      • Student#_read_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/read.rb:70
                                        • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/read.rb:71
                                        • ActiveRecord::AttributeSet#fetch_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:44
                                          • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:12
                                            • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:41
                                          • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                                      • Student::ActiveRecord_Relation#where $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:599
                                        • Hash#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:602
                                        • Student::ActiveRecord_Relation#spawn $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:8
                                          • Kernel#clone $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:9
                                            • Kernel#initialize_clone $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:9
                                              • Student::ActiveRecord_Relation#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:31
                                                • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:32
                                                  • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:32
                                                    • Hash#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:32
                                                • Student::ActiveRecord_Relation#reset $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:557
                                                  • Kernel#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:560
                                        • Student::ActiveRecord_Relation#where! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:609
                                          • Student::ActiveRecord_Relation#sanitize_for_mass_assignment $GemPath0/gems/activemodel-5.1.2/lib/active_model/forbidden_attributes_protection.rb:19
                                            • Kernel#respond_to? $GemPath0/gems/activemodel-5.1.2/lib/active_model/forbidden_attributes_protection.rb:20
                                          • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:611
                                          • ActiveRecord::PredicateBuilder.references $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:37
                                            • Enumerable#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:38
                                              • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:38
                                                • ActiveRecord::PredicateBuilder.block in references $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:38
                                                  • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:39
                                                  • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:42
                                                  • String#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:43
                                            • Array#compact $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:45
                                          • Student::ActiveRecord_Relation#references! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:195
                                            • Array#flatten! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:196
                                            • Array#map! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:197
                                            • Student::ActiveRecord_Relation#references_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                            • Array#| $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:199
                                            • Student::ActiveRecord_Relation#references_values= $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:71
                                              • Student::ActiveRecord_Relation#set_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:927
                                                • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:934
                                          • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:80
                                          • Student::ActiveRecord_Relation#where_clause_factory $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1175
                                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1176
                                              • ActiveRecord::Relation::WhereClauseFactory#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:4
                                          • ActiveRecord::Relation::WhereClauseFactory#build $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:9
                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:11
                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:11
                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:13
                                            • ActiveRecord::PredicateBuilder#resolve_column_aliases $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:11
                                              • ActiveRecord::TableMetadata#resolve_column_aliases $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:12
                                                • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:13
                                                  • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:13
                                                    • Hash#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:13
                                                • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:14
                                                  • ActiveRecord::TableMetadata#block in resolve_column_aliases $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:14
                                                    • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:15
                                            • Student.expand_hash_conditions_for_aggregates $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:87
                                              • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:89
                                                • Student.block in expand_hash_conditions_for_aggregates $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:89
                                                  • String#to_sym $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:90
                                                  • Student.reflect_on_aggregation $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:63
                                                    • Student.aggregate_reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                      • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                    • Symbol#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:64
                                            • Hash#stringify_keys! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:43
                                              • Hash#transform_keys! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:23
                                                • Kernel#block_given? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:24
                                                • Hash#keys $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:25
                                                • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:25
                                                  • Hash#block in transform_keys! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:25
                                                    • String#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:26
                                                    • Hash#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/keys.rb:26
                                            • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:18
                                            • ActiveRecord::Relation::WhereClauseFactory#perform_case_sensitive? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:41
                                            • ActiveRecord::PredicateBuilder#create_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:32
                                              • ActiveRecord::PredicateBuilder#convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:137
                                                • Hash#select $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:138
                                                  • ActiveRecord::PredicateBuilder#block in convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:138
                                                    • String#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:139
                                                • Hash#each_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:142
                                              • ActiveRecord::PredicateBuilder#create_binds_for_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:85
                                                • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:86
                                                  • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:86
                                                    • Hash#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:86
                                                • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:89
                                                  • ActiveRecord::PredicateBuilder#block in create_binds_for_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:89
                                                    • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:91
                                                    • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:96
                                                    • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:98
                                                    • ActiveRecord::PredicateBuilder#can_be_bound? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:157
                                                      • ActiveRecord::TableMetadata#associated_with? $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:42
                                                        • Student._reflect_on_association $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:115
                                                          • Student._reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                            • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                          • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:116
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:160
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:160
                                                      • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:163
                                                      • ActiveRecord::PredicateBuilder#handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:153
                                                        • Enumerable#detect $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                          • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::Base.=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:262
                                                                • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:263
                                                            • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                        • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                      • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:163
                                                    • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:113
                                                      • BasicObject#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:113
                                                    • ActiveRecord::PredicateBuilder#build_bind_param $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:167
                                                      • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:168
                                                      • ActiveRecord::TableMetadata#type $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:30
                                                        • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:32
                                                        • Student.type_for_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:372
                                                          • Student.attribute_types $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:352
                                                            • Student.load_schema $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:459
                                                              • Student.schema_loaded? $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:455
                                                      • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:168
                                                        • ActiveRecord::Relation::QueryAttribute#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:29
                                                    • ActiveRecord::TableMetadata#associated_with? $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:42
                                                      • Student._reflect_on_association $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:115
                                                        • Student._reflections -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                          • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                        • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/reflection.rb:116
                                            • ActiveRecord::PredicateBuilder#build_from_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:27
                                              • ActiveRecord::PredicateBuilder#convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:137
                                                • Hash#select $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:138
                                                  • ActiveRecord::PredicateBuilder#block in convert_dot_notation_to_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:138
                                                    • String#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:139
                                                • Hash#each_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:142
                                              • ActiveRecord::PredicateBuilder#expand_from_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:73
                                                • Enumerable#flat_map $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:76
                                                  • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:76
                                                    • ActiveRecord::PredicateBuilder#block in expand_from_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:76
                                                      • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:77
                                                      • ActiveRecord::TableMetadata#arel_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/table_metadata.rb:22
                                                        • Student.arel_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:285
                                                          • Student.attribute_alias? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:218
                                                            • Student.attribute_aliases -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                              • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                            • String#to_s $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                                            • Hash#key? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                                          • Arel::Table#[] $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:80
                                                            • #<Class:#<Class:0x007f387e6f98a8>>#new $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                                              • Struct#initialize $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                                      • ActiveRecord::PredicateBuilder#build $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:63
                                                        • ActiveRecord::PredicateBuilder#handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:153
                                                          • Enumerable#detect $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                            • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • ActiveRecord::Base.=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:262
                                                                  • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:263
                                                              • ActiveRecord::PredicateBuilder#block in handler_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                          • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder.rb:154
                                                        • ActiveRecord::PredicateBuilder::BasicObjectHandler#call $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/predicate_builder/basic_object_handler.rb:4
                                                          • Arel::Attributes::Attribute#eq $GemPath0/gems/arel-8.0.0/lib/arel/predications.rb:16
                                                            • Arel::Attributes::Attribute#quoted_node $GemPath0/gems/arel-8.0.0/lib/arel/predications.rb:224
                                                              • Arel::Nodes.build_quoted $GemPath0/gems/arel-8.0.0/lib/arel/nodes/casted.rb:31
                                                                • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/nodes/casted.rb:33
                                                            • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/predications.rb:17
                                                              • Arel::Nodes::Equality#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:7
                                                                • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:8
                                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause_factory.rb:30
                                              • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                                          • ActiveRecord::Relation::WhereClause#+ $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:13
                                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:14
                                              • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                                          • Student::ActiveRecord_Relation#where_clause= $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:71
                                            • Student::ActiveRecord_Relation#set_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:927
                                              • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:934
                                      • Student#locking_enabled? $GemPath0/gems/activerecord-5.1.2/lib/active_record/locking/optimistic.rb:58
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/locking/optimistic.rb:59
                                        • Student.locking_enabled? $GemPath0/gems/activerecord-5.1.2/lib/active_record/locking/optimistic.rb:143
                                          • Student.lock_optimistically -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                            • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                          • Student.columns_hash $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:342
                                            • Student.load_schema $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:459
                                              • Student.schema_loaded? $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:455
                                          • Student.locking_column $GemPath0/gems/activerecord-5.1.2/lib/active_record/locking/optimistic.rb:154
                                      • Hash#keys $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:533
                                      • Student#clear_attribute_changes $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:90
                                        • Student#clear_attribute_changes $GemPath0/gems/activemodel-5.1.2/lib/active_model/dirty.rb:268
                                          • Student#changed_attributes $GemPath0/gems/activemodel-5.1.2/lib/active_model/dirty.rb:175
                                            • Class#new $GemPath0/gems/activemodel-5.1.2/lib/active_model/dirty.rb:176
                                              • ActiveSupport::HashWithIndifferentAccess#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:64
                                                • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:65
                                                • Hash#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:66
                                                • ActiveSupport::HashWithIndifferentAccess#update $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:131
                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:132
                                                  • Hash#to_hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:135
                                                  • Hash#each_pair $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:135
                                                • Hash#to_hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:69
                                                • Hash#default $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:70
                                                • Hash#default_proc $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:71
                                          • ActiveSupport::HashWithIndifferentAccess#except! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/except.rb:18
                                            • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/except.rb:19
                                              • ActiveSupport::HashWithIndifferentAccess#block in except! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/hash/except.rb:19
                                                • ActiveSupport::HashWithIndifferentAccess#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:243
                                                  • ActiveSupport::HashWithIndifferentAccess#convert_key $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:288
                                                    • Kernel#kind_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:289
                                                  • Hash#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/hash_with_indifferent_access.rb:244
                                        • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:92
                                          • Student#block in clear_attribute_changes $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:92
                                            • Student#clear_attribute_change $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:271
                                              • Student#mutation_tracker $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:241
                                                • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:245
                                                  • ActiveRecord::AttributeMutationTracker#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:5
                                                    • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:7
                                                      • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                                                        • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                                                          • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                                                        • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                                                    • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:8
                                                      • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                                                        • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                                                          • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                                                        • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                                              • ActiveRecord::AttributeMutationTracker#forget_change $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:50
                                                • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:51
                                                • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:12
                                                  • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:41
                                                • ActiveRecord::Attribute::FromUser#forgetting_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:62
                                                  • ActiveRecord::Attribute::FromUser#value_for_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:50
                                                    • ActiveRecord::Attribute::FromUser#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                                                      • ActiveRecord::Attribute::FromUser#type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:172
                                                        • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:9
                                                          • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:10
                                                          • 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-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:12
                                                          • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:14
                                                          • 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-5.1.2/lib/active_model/type/helpers/time_value.rb:44
                                                              • Time.zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:12
                                                                • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:13
                                                                • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:13
                                                              • Time#in_time_zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:18
                                                                • Time.find_zone! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:80
                                                                  • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:81
                                                                • Time#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                                  • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                                  • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                                  • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                                • Time#time_with_zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:31
                                                                  • Time#utc? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                  • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                    • ActiveSupport::TimeWithZone#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:50
                                                                      • ActiveSupport::TimeWithZone#transfer_time_values_to_utc_constructor $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:492
                                                                        • Kernel#instance_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:494
                                                                        • Time#utc? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:494
                                                          • 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-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                  • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:431
                                                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:432
                                                                  • ActiveRecord::Type::DateTime#cast $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:35
                                                                    • Kernel#nil? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:36
                                                                    • ActiveRecord::Type::DateTime#cast_value $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/date_time.rb:15
                                                                      • ActiveSupport::TimeWithZone#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:431
                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:432
                                                                      • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:33
                                                    • 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-5.1.2/lib/active_model/type/helpers/time_value.rb:7
                                                          • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:33
                                                          • ActiveSupport::TimeWithZone#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                            • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                            • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:457
                                                              • Symbol#to_sym $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:459
                                                              • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:460
                                                          • ActiveRecord::Type::DateTime#is_utc? $GemPath0/gems/activerecord-5.1.2/lib/active_record/type/internal/timezone.rb:5
                                                            • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                          • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:457
                                                            • Symbol#to_sym $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:459
                                                            • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:460
                                                          • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:62
                                                  • ActiveRecord::Attribute::FromUser#with_value_from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:71
                                                    • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:72
                                                    • ActiveRecord::Attribute::FromUser.from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:4
                                                      • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:5
                                                        • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:29
                                                • ActiveRecord::AttributeSet#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:16
                                                  • ActiveRecord::LazyAttributeHash#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:45
                                                    • Kernel#frozen? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:46
                                                • Set#delete /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:344
                                                  • Hash#delete /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:345
                                              • Student#mutations_from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:260
                                                • Student#mutation_tracker $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/dirty.rb:241
                                              • ActiveRecord::AttributeMutationTracker#forget_change $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:50
                                                • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_mutation_tracker.rb:51
                                                • ActiveRecord::AttributeSet#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:12
                                                  • ActiveRecord::LazyAttributeHash#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:41
                                                • ActiveRecord::Attribute::FromDatabase#forgetting_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:62
                                                  • ActiveRecord::Attribute::FromDatabase#value_for_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:50
                                                    • ActiveRecord::Attribute::FromDatabase#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                                                      • ActiveRecord::Attribute::FromDatabase#type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:162
                                                        • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#deserialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:5
                                                          • 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-5.1.2/lib/active_model/type/value.rb:21
                                                                • ActiveRecord::Type::DateTime#cast -> block in initialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                  • ActiveRecord::Type::DateTime#block in initialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:6
                                                                    • Kernel#is_a? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/accepts_multiparameter_time.rb:7
                                                                    • ActiveRecord::Type::DateTime#cast $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:35
                                                                      • Kernel#nil? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:36
                                                                      • ActiveRecord::Type::DateTime#cast_value $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/date_time.rb:15
                                                                        • Kernel#is_a? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/date_time.rb:16
                                                                        • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:33
                                                          • ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter#convert_time_to_time_zone $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:27
                                                            • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/time_zone_conversion.rb:28
                                                            • Time#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                              • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                              • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                              • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                            • Time.zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:12
                                                              • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:13
                                                              • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:13
                                                            • Time#in_time_zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:18
                                                              • Time.find_zone! $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:80
                                                                • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/zones.rb:81
                                                              • Time#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                                • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                                • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                                • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                              • Time#time_with_zone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:31
                                                                • Time#utc? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/date_and_time/zones.rb:33
                                                                  • ActiveSupport::TimeWithZone#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:50
                                                                    • ActiveSupport::TimeWithZone#transfer_time_values_to_utc_constructor $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:492
                                                                      • Kernel#instance_of? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:494
                                                                      • Time#utc? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:494
                                                    • 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-5.1.2/lib/active_model/type/helpers/time_value.rb:7
                                                          • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:33
                                                          • ActiveSupport::TimeWithZone#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                            • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                            • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                            • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:457
                                                              • Symbol#to_sym $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:459
                                                              • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:460
                                                          • ActiveRecord::Type::DateTime#is_utc? $GemPath0/gems/activerecord-5.1.2/lib/active_record/type/internal/timezone.rb:5
                                                            • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                          • ActiveSupport::TimeWithZone#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:457
                                                            • Symbol#to_sym $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:459
                                                            • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:460
                                                          • ActiveSupport::TimeWithZone#utc $GemPath0/gems/activesupport-5.1.2/lib/active_support/time_with_zone.rb:62
                                                  • ActiveRecord::Attribute::FromDatabase#with_value_from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:71
                                                    • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:72
                                                    • ActiveRecord::Attribute::FromDatabase.from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:4
                                                      • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:5
                                                        • ActiveRecord::Attribute::FromDatabase#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:29
                                                • ActiveRecord::AttributeSet#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:16
                                                  • ActiveRecord::LazyAttributeHash#[]= $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:45
                                                    • Kernel#frozen? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:46
                                                • Set#delete /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:344
                                                  • Hash#delete /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:345
                                      • Student::ActiveRecord_Relation#update_all $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:363
                                        • Hash#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:364
                                        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:366
                                          • Arel::UpdateManager#initialize $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:4
                                            • Arel::UpdateManager#initialize $GemPath0/gems/arel-8.0.0/lib/arel/tree_manager.rb:12
                                            • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:6
                                              • Arel::Nodes::UpdateStatement#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/update_statement.rb:8
                                        • Student.table_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:217
                                        • Student.sanitize_sql_for_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:48
                                          • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:50
                                          • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:51
                                          • Student.sanitize_sql_hash_for_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:110
                                            • Student.connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:87
                                              • Student.retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:115
                                                • Student.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:141
                                                  • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                  • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                  • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                                  • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                    • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                                    • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                      • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:95
                                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:928
                                                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:958
                                                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:977
                                                      • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:978
                                                      • 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-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:373
                                                    • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:374
                                                    • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:615
                                                    • 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
                                            • Enumerable#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:112
                                              • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:112
                                                • Student.block in sanitize_sql_hash_for_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:112
                                                  • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:113
                                                  • Student.type_for_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:372
                                                    • Student.attribute_types $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:352
                                                      • Student.load_schema $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:459
                                                        • Student.schema_loaded? $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:455
                                                  • 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-5.1.2/lib/active_model/type/helpers/time_value.rb:7
                                                        • ActiveRecord::Type::DateTime#apply_seconds_precision $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:33
                                                        • Time#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                          • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                          • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                          • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                        • ActiveRecord::Type::DateTime#is_utc? $GemPath0/gems/activerecord-5.1.2/lib/active_record/type/internal/timezone.rb:5
                                                          • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                        • Kernel#respond_to? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:13
                                                        • Time#getutc $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/time_value.rb:14
                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_table_name_for_assignment $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:9
                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:89
                                                        • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:90
                                                      • String#gsub $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:14
                                                      • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:14
                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:9
                                                    • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:10
                                                    • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:12
                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_quote $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:181
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:183
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:183
                                                      • TrueClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:185
                                                        • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:185
                                                      • FalseClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:186
                                                        • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:186
                                                      • NilClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:187
                                                        • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:187
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:189
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:190
                                                      • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:135
                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:136
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:191
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:192
                                                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:193
                                                      • Time.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:15
                                                        • Module#=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:16
                                                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quoted_date $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:137
                                                        • Time#acts_like? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:7
                                                          • Symbol#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                          • String#intern $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                          • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/acts_like.rb:8
                                                        • ActiveRecord::Base.default_timezone $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                        • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:141
                                                        • Time#getutc $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:142
                                                        • Time#to_formatted_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/conversions.rb:49
                                                          • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/conversions.rb:51
                                                          • Time#strftime $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/conversions.rb:51
                                                        • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:147
                                                        • Time#usec $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:147
                                                        • Time#usec $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:148
                                                        • Kernel#sprintf $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:148
                                            • Array#join $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:115
                                        • Arel.sql $GemPath0/gems/arel-8.0.0/lib/arel.rb:29
                                          • Class#new $GemPath0/gems/arel-8.0.0/lib/arel.rb:30
                                            • String#initialize $GemPath0/gems/arel-8.0.0/lib/arel.rb:30
                                        • Arel::UpdateManager#set $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:44
                                          • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:45
                                        • Arel::UpdateManager#table $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:30
                                        • Student::ActiveRecord_Relation#has_join_values? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:654
                                          • Student::ActiveRecord_Relation#joins_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                          • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:655
                                          • Student::ActiveRecord_Relation#left_outer_joins_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                          • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:655
                                        • Student::ActiveRecord_Relation#primary_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:44
                                          • Student.primary_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods/primary_key.rb:73
                                        • Student::ActiveRecord_Relation#arel_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:104
                                          • Student.arel_attribute $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:285
                                            • Student.attribute_alias? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:218
                                              • Student.attribute_aliases -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                              • String#to_s $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                              • Hash#key? $GemPath0/gems/activemodel-5.1.2/lib/active_model/attribute_methods.rb:219
                                            • Arel::Table#[] $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:80
                                              • #<Class:#<Class:0x007f387e6f98a8>>#new $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                                • Struct#initialize $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                        • Arel::UpdateManager#key= $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:15
                                          • Arel::Nodes.build_quoted $GemPath0/gems/arel-8.0.0/lib/arel/nodes/casted.rb:31
                                            • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/nodes/casted.rb:33
                                            • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/nodes/casted.rb:33
                                        • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:917
                                          • Student::ActiveRecord_Relation#build_arel $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:939
                                            • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:940
                                              • Arel::SelectManager#initialize $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:10
                                                • Arel::SelectManager#initialize $GemPath0/gems/arel-8.0.0/lib/arel/tree_manager.rb:12
                                                • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:12
                                                  • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_statement.rb:8
                                                    • Arel::Nodes::SelectCore#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_core.rb:8
                                                      • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_core.rb:9
                                                      • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_core.rb:10
                                                        • Arel::Nodes::JoinSource#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/join_source.rb:10
                                                          • Arel::Nodes::JoinSource#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:7
                                                            • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:8
                                                  • Arel::Nodes::SelectStatement#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_statement.rb:8
                                                    • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/select_statement.rb:9
                                                • Array#last $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:13
                                                • Arel::SelectManager#from $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:88
                                                  • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:89
                                                  • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:92
                                            • Student::ActiveRecord_Relation#joins_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                            • Student::ActiveRecord_Relation#left_outer_joins_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                            • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                            • ActiveRecord::Relation::WhereClause#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:6
                                              • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:6
                                            • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                            • ActiveRecord::Relation::WhereClause#ast $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:66
                                              • ActiveRecord::Relation::WhereClause#predicates_with_wrapped_sql_literals $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:165
                                                • ActiveRecord::Relation::WhereClause#non_empty_predicates $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:176
                                                  • Array#- $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:177
                                                    • Arel::Nodes::Equality#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:19
                                                      • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                      • Array#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                        • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                        • Struct#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                          • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                          • Arel::Table#hash $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:84
                                                            • String#hash $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:88
                                                          • String#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                        • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/nodes/binary.rb:20
                                                • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:166
                                                  • ActiveRecord::Relation::WhereClause#block in predicates_with_wrapped_sql_literals $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:166
                                                    • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:167
                                              • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:67
                                                • Arel::Nodes::And#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/and.rb:7
                                                  • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/and.rb:8
                                            • Arel::SelectManager#where $GemPath0/gems/arel-8.0.0/lib/arel/tree_manager.rb:34
                                              • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/tree_manager.rb:35
                                            • Student::ActiveRecord_Relation#having_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:80
                                            • ActiveRecord::Relation::WhereClause#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:6
                                              • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:6
                                            • Student::ActiveRecord_Relation#limit_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                            • Student::ActiveRecord_Relation#offset_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                            • Student::ActiveRecord_Relation#group_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                            • Student::ActiveRecord_Relation#build_order $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1095
                                              • Student::ActiveRecord_Relation#order_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                                • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                  • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                              • Array#uniq $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1096
                                              • Array#reject! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1097
                                            • Student::ActiveRecord_Relation#build_select $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1041
                                              • Student::ActiveRecord_Relation#select_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                                • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                  • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                    • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                              • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1042
                                              • Student.arel_table $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:271
                                              • Arel.star $GemPath0/gems/arel-8.0.0/lib/arel.rb:33
                                                • Arel.sql $GemPath0/gems/arel-8.0.0/lib/arel.rb:29
                                                  • Class#new $GemPath0/gems/arel-8.0.0/lib/arel.rb:30
                                                    • String#initialize $GemPath0/gems/arel-8.0.0/lib/arel.rb:30
                                              • Arel::Table#[] $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:80
                                                • #<Class:#<Class:0x007f387e6f98a8>>#new $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                                  • Struct#initialize $GemPath0/gems/arel-8.0.0/lib/arel/table.rb:81
                                              • Arel::SelectManager#project $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:133
                                                • Array#map $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:136
                                                  • Arel::SelectManager#block in project $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:136
                                                    • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:137
                                                    • Array#include? $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:137
                                                • Array#concat $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:136
                                            • Student::ActiveRecord_Relation#distinct_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                            • Arel::SelectManager#distinct $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:150
                                            • Student::ActiveRecord_Relation#from_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • ActiveRecord::Relation::FromClause.empty $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:27
                                            • ActiveRecord::Relation::FromClause#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:23
                                              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:24
                                            • Student::ActiveRecord_Relation#lock_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                        • Arel::SelectManager#limit $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:22
                                        • Arel::UpdateManager#take $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:10
                                        • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:917
                                        • Arel::SelectManager#orders $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:176
                                        • Arel::UpdateManager#order $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:23
                                        • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:917
                                        • Arel::SelectManager#constraints $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:27
                                        • Arel::UpdateManager#wheres= $GemPath0/gems/arel-8.0.0/lib/arel/update_manager.rb:35
                                        • Student.connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:87
                                          • Student.retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:115
                                            • Student.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:141
                                              • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                  • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                  • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                              • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                            • Student.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                              • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                              • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                                • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                  • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:95
                                            • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:928
                                              • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:958
                                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:977
                                                  • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:978
                                                  • 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-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:373
                                                • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:374
                                                • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:615
                                                • 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#bound_attributes $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:77
                                          • Student::ActiveRecord_Relation#limit_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                          • Student::ActiveRecord_Relation#offset_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1192
                                          • Student::ActiveRecord_Relation#connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/delegation.rb:44
                                            • Student.connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:87
                                              • Student.retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:115
                                                • Student.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:141
                                                  • ActiveRecord::RuntimeRegistry.connection_handler $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                    • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                  • Student.default_connection_handler -> block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                    • Student.block (4 levels) in class_attribute $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/class/attribute.rb:90
                                                • Student.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                  • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                                  • ApplicationRecord.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                    • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:96
                                                    • ActiveRecord::Base.connection_specification_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:94
                                                      • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_handling.rb:95
                                                • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:928
                                                  • ActiveRecord::ConnectionAdapters::ConnectionHandler#retrieve_connection_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:958
                                                    • ActiveRecord::ConnectionAdapters::ConnectionHandler#owner_to_pool $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:977
                                                      • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:978
                                                      • 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-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:373
                                                    • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:374
                                                    • ActiveRecord::ConnectionAdapters::ConnectionPool#connection_cache_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:615
                                                    • 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-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                                                • ActiveRecord::Relation::FromClause.empty $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:27
                                          • ActiveRecord::Relation::FromClause#binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:11
                                            • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:12
                                          • Student::ActiveRecord_Relation#arel $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:917
                                          • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                          • Student::ActiveRecord_Relation#having_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                                            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                                              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                                                • ActiveRecord::Relation::WhereClause.empty $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:80
                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#combine_bind_parameters $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:496
                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#update $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/query_cache.rb:15
                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#update $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:129
                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#to_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:10
                                              • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:11
                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#collector $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:143
                                                • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:145
                                                  • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#initialize $GemPath0/gems/arel-8.0.0/lib/arel/collectors/sql_string.rb:9
                                                    • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#initialize $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:5
                                                      • Kernel#dup $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:6
                                                        • Kernel#initialize_dup $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:6
                                                          • String#initialize_copy $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:6
                                              • Arel::Visitors::SQLite#accept $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb:6
                                                • Arel::Visitors::SQLite#accept $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:7
                                                  • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                    • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                    • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                    • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                    • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:16
                                                      • Module#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                      • String#gsub $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                    • Arel::Visitors::SQLite#visit_Arel_Nodes_UpdateStatement $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:102
                                                      • NilClass#nil? $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:103
                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                        • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                        • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                        • Arel::Visitors::SQLite#visit_Arel_Table $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:586
                                                          • Arel::Visitors::SQLite#quote_table_name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:779
                                                            • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:780
                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_table_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:94
                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                      • Arel::Visitors::SQLite#inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:795
                                                        • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                        • Enumerable#inject $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                          • Enumerator#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                            • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                              • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                  • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                                    • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                                    • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                    • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                    • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:16
                                                                      • Module#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                      • String#gsub $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                    • Arel::Visitors::SQLite#visit_Arel_Nodes_SqlLiteral $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/determine_if_preparable_visitor.rb:16
                                                                      • Arel::Visitors::SQLite#literal $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:715
                                                                        • String#to_s $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:715
                                                                        • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                      • Arel::Visitors::SQLite#inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:795
                                                        • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                        • Enumerable#inject $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                          • Enumerator#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                            • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                              • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                  • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                                    • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                                    • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                    • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                    • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:16
                                                                      • Module#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                      • String#gsub $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                    • Arel::Visitors::SQLite#visit_Arel_Nodes_And $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:615
                                                                      • Arel::Visitors::SQLite#inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:795
                                                                        • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                        • Enumerable#inject $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                          • Enumerator#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                            • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                              • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                                • Arel::Visitors::SQLite#block in inject_join $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:797
                                                                                  • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                                                    • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                                                    • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                    • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                    • Arel::Visitors::SQLite.block in dispatch_cache $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:16
                                                                                      • Module#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                                      • String#gsub $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:17
                                                                                    • Arel::Visitors::SQLite#visit_Arel_Nodes_Equality $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:638
                                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                                                        • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                        • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                        • Arel::Visitors::SQLite#visit_Arel_Attributes_Attribute $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:704
                                                                                          • #<Class:0x007f387e6f98a8>#relation $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:705
                                                                                          • #<Class:0x007f387e6f98a8>#relation $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:705
                                                                                          • Arel::Visitors::SQLite#quote_table_name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:779
                                                                                            • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:780
                                                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_table_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:94
                                                                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                                                          • #<Class:0x007f387e6f98a8>#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:706
                                                                                          • Arel::Visitors::SQLite#quote_column_name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:784
                                                                                            • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:785
                                                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#quote_column_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:13
                                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                                                      • Kernel#nil? $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:643
                                                                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                                                      • Arel::Visitors::SQLite#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:13
                                                                                        • Arel::Visitors::SQLite#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                                                        • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                        • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/reduce.rb:14
                                                                                        • Arel::Visitors::SQLite#visit_Arel_Nodes_BindParam $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:717
                                                                                          • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#add_bind $GemPath0/gems/arel-8.0.0/lib/arel/collectors/sql_string.rb:14
                                                                                            • Arel::Visitors::SQLite#block in visit_Arel_Nodes_BindParam $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:718
                                                                                            • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#compile $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:138
                                                • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#compile $GemPath0/gems/arel-8.0.0/lib/arel/collectors/sql_string.rb:20
                                                  • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#value $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:9
                                              • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:13
                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#exec_delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:238
                                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#exec_query $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:205
                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#type_casted_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:162
                                                  • Array#first $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:163
                                                  • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:163
                                                  • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:166
                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in type_casted_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:166
                                                      • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_attribute.rb:10
                                                        • ActiveRecord::Relation::QueryAttribute#value_for_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:50
                                                          • ActiveRecord::Relation::QueryAttribute#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                                                            • ActiveRecord::Relation::QueryAttribute#type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_attribute.rb:6
                                                          • ActiveModel::Type::Integer#serialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:24
                                                            • ActiveModel::Type::Integer#cast $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:5
                                                              • TrueClass#=== $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:8
                                                                • BasicObject#== $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:8
                                                              • FalseClass#=== $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:9
                                                                • BasicObject#== $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:9
                                                              • Module#=== $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/helpers/numeric.rb:10
                                                              • ActiveModel::Type::Integer#cast $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:35
                                                                • Kernel#nil? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:36
                                                                • ActiveModel::Type::Integer#cast_value $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:40
                                                                  • Integer#to_i $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:45
                                                            • ActiveModel::Type::Integer#ensure_in_range $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:49
                                                              • Range#cover? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:50
                                                                • Integer#<=> $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:50
                                                                • Integer#<=> $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/integer.rb:50
                                                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:31
                                                        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:32
                                                        • Kernel#respond_to? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:34
                                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:27
                                                          • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:29
                                                          • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3/quoting.rb:31
                                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#_type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:200
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:202
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:202
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:202
                                                            • TrueClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:204
                                                              • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:204
                                                            • FalseClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:205
                                                              • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:205
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:207
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:208
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:209
                                                            • Time.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:15
                                                              • Module#=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:16
                                                              • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:16
                                                            • ActiveRecord::ConnectionAdapters::SQLite3Adapter#types_which_need_no_typecasting $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:177
                                                            • NilClass#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:210
                                                              • BasicObject#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:210
                                                            • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/quoting.rb:210
                                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:602
                                                  • Kernel#object_id $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                                  • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:17
                                                    • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:32
                                                      • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:41
                                                        • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:42
                                                          • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                                              • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:78
                                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                                • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:84
                                                                  • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                                    • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                                      • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                                  • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                                    • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:56
                                                                      • Kernel#dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                                        • Kernel#initialize_dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                                          • Hash#initialize_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                                  • Array#last $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:86
                                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                                  • Array#push $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:89
                                                          • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                                              • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:6
                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                                      • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                        • Monitor#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
                                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block (2 levels) in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:611
                                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in exec_query $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:208
                                                            • ActiveSupport::Dependencies.interlock $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                            • ActiveSupport::Dependencies::Interlock#permit_concurrent_loads $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies/interlock.rb:44
                                                              • ActiveSupport::Concurrency::ShareLock#yield_shares $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:169
                                                                • ActiveSupport::Concurrency::ShareLock#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                  • ActiveSupport::Concurrency::ShareLock#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
                                                                  • ActiveSupport::Concurrency::ShareLock#block in yield_shares $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:171
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:172
                                                                    • Hash#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:172
                                                                      • Kernel#hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:172
                                                                    • MonitorMixin::ConditionVariable#broadcast /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:147
                                                                      • ActiveSupport::Concurrency::ShareLock#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::ConditionVariable#broadcast /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:149
                                                                  • ActiveSupport::Concurrency::ShareLock#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                    • ActiveSupport::Concurrency::ShareLock#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::Dependencies::Interlock#block in permit_concurrent_loads $GemPath0/gems/activesupport-5.1.2/lib/active_support/dependencies/interlock.rb:45
                                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block (2 levels) in exec_query $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:209
                                                                    • 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-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:629
                                                                    • 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
                                                                    • Enumerable#to_a $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:218
                                                                      • 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-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:220
                                                                    • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:233
                                                                      • ActiveRecord::Result#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:37
                                                                • ActiveSupport::Concurrency::ShareLock#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                                                  • ActiveSupport::Concurrency::ShareLock#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
                                                                  • ActiveSupport::Concurrency::ShareLock#block in yield_shares $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:187
                                                                    • ActiveSupport::Concurrency::ShareLock#wait_for $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:217
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:218
                                                                      • Kernel#hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:218
                                                                      • MonitorMixin::ConditionVariable#wait_while /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:121
                                                                        • ActiveSupport::Concurrency::ShareLock#block in wait_for $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:219
                                                                          • ActiveSupport::Concurrency::ShareLock#block (2 levels) in yield_shares $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:188
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:221
                                                                      • Hash#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:221
                                                                        • Kernel#hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:221
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:193
                                                                    • Hash#delete $GemPath0/gems/activesupport-5.1.2/lib/active_support/concurrency/share_lock.rb:193
                                                                  • ActiveSupport::Concurrency::ShareLock#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                                    • ActiveSupport::Concurrency::ShareLock#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
                                                        • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                                          • Monitor#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
                                                    • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:41
                                                      • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:45
                                                        • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                                          • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                                              • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:82
                                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                                • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:92
                                                                  • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                                    • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                                      • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                                  • Array#pop $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:94
                                                                  • Hash#merge! $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:96
                                                                  • String#split $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                                  • Array#first $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                                  • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:18
                                                                    • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:19
                                                                    • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:9
                                                                      • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                          • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                                      • Time#minus_with_coercion $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:276
                                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:277
                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:278
                                                                        • Time#minus_with_duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:263
                                                                          • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:135
                                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:136
                                                                          • Time#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                                            • Integer#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                                            • Numeric#quo $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                                              • Integer#fdiv $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                                    • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:5
                                                                      • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:19
                                                                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                          • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                                      • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                                    • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:92
                                                                      • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                        • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                          • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                            • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_record/log_subscriber.rb:24
                                                                    • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                                    • Float#round $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:26
                                                                    • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:102
                                                                      • NilClass#=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:104
                                                                      • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:105
                                                                    • ActiveRecord::LogSubscriber#type_casted_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:46
                                                                    • Array#zip $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:33
                                                                    • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:33
                                                                      • ActiveRecord::LogSubscriber#block in sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:33
                                                                        • ActiveRecord::LogSubscriber#render_bind $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:50
                                                                          • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:51
                                                                          • ActiveModel::Type::Integer#binary? $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:55
                                                                    • Array#inspect $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:35
                                                                      • Array#inspect $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:35
                                                                        • String#inspect $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:35
                                                                        • Integer#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:35
                                                                    • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:60
                                                                      • String#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:116
                                                                        • Regexp#match? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:120
                                                                      • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                                        • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                                    • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:68
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:70
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:74
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:76
                                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:78
                                                                    • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                                      • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                                    • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:94
                                                                      • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                                        • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                                      • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                                        • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                                      • 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-5.1.2/lib/active_support/logger.rb:24
                                                                          • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:24
                                                                            • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:85
                                                                              • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                                              • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                                • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                                  • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                                    • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:101
                                                                                    • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:85
                                                                              • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                                              • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                                • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                                  • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                                    • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/tagged_logging.rb:20
                                                                                    • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:51
                                                                                      • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:45
                                                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                                      • Array#any? $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:53
                                                                                    • NilClass#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:21
                                                                                    • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:101
                                                                                      • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:46
                                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                                              • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:10
                                                                • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:53
                                                                  • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                    • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                                  • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_registry.rb:21
                                              • SQLite3::Database#changes $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:240
                      • #<Class:Thread>#current $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:203
                      • Thread#status $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:203
                      • ActiveRecord::ConnectionAdapters::TransactionManager#commit_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:167
                        • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                          • Monitor#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
                          • ActiveRecord::ConnectionAdapters::TransactionManager#block in commit_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:168
                            • Array#last $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:169
                            • ActiveRecord::ConnectionAdapters::RealTransaction#before_commit_records $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:78
                              • Array#uniq $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:79
                              • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:79
                            • Array#pop $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:174
                            • ActiveRecord::ConnectionAdapters::RealTransaction#commit $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:139
                              • ActiveRecord::ConnectionAdapters::SQLite3Adapter#commit_db_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:260
                                • ActiveRecord::ConnectionAdapters::SQLite3Adapter#log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:602
                                  • Kernel#object_id $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                  • ActiveSupport::Notifications::Instrumenter#instrument $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:17
                                    • ActiveSupport::Notifications::Instrumenter#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:32
                                      • ActiveSupport::Notifications::Fanout#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:41
                                        • ActiveSupport::Notifications::Fanout#listeners_for $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:42
                                          • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                              • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:78
                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                • ActiveRecord::LogSubscriber#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:84
                                                  • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                    • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                      • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                  • Class#new $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:85
                                                    • ActiveSupport::Notifications::Event#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:56
                                                      • Kernel#dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                        • Kernel#initialize_dup $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                          • Hash#initialize_copy $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:58
                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                  • Array#last $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:86
                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                  • Array#push $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:89
                                          • ActiveSupport::Notifications::Fanout#block in start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:42
                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#start $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:97
                                              • ActiveRecord::ExplainSubscriber#start $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:6
                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:610
                                      • Monitor#mon_synchronize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:211
                                        • Monitor#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
                                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block (2 levels) in log $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract_adapter.rb:611
                                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#block in commit_db_transaction $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:261
                                            • 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
                                        • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                                          • Monitor#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
                                    • ActiveSupport::Notifications::Instrumenter#finish_with_state $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:41
                                      • ActiveSupport::Notifications::Fanout#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:45
                                        • Array#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                          • ActiveSupport::Notifications::Fanout#block in finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:46
                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                              • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:82
                                                • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                  • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                • ActiveRecord::LogSubscriber#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:92
                                                  • #<Class:Time>#now $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                    • Time#initialize $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                      • Integer#+ $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:93
                                                  • ActiveRecord::LogSubscriber#event_stack $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:104
                                                    • ActiveSupport::SubscriberQueueRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                      • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                      • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveSupport::SubscriberQueueRegistry#get_queue $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:120
                                                  • Array#pop $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:94
                                                  • Hash#merge! $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:96
                                                  • String#split $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                  • Array#first $GemPath0/gems/activesupport-5.1.2/lib/active_support/subscriber.rb:98
                                                  • ActiveRecord::LogSubscriber#sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:18
                                                    • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:19
                                                    • ActiveRecord::LogSubscriber.runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:9
                                                      • ActiveRecord::RuntimeRegistry.sql_runtime $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:18
                                                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                          • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                      • Time#minus_with_coercion $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:276
                                                        • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:277
                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:278
                                                        • Time#minus_with_duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:263
                                                          • ActiveSupport::Duration.=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:135
                                                            • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/duration.rb:136
                                                          • Time#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                            • Integer#- $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                            • Numeric#quo $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                              • Integer#fdiv $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/time/calculations.rb:267
                                                    • ActiveRecord::LogSubscriber.runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:5
                                                      • ActiveRecord::RuntimeRegistry.sql_runtime= $GemPath0/gems/activerecord-5.1.2/lib/active_record/runtime_registry.rb:19
                                                        • ActiveRecord::RuntimeRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                          • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                          • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                      • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                    • ActiveSupport::Logger#debug? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:92
                                                      • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                        • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                          • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                            • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                            • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_record/log_subscriber.rb:24
                                                      • String#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:24
                                                      • String#== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:24
                                                    • NilClass#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:26
                                                    • ActiveSupport::Notifications::Event#duration $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/instrumenter.rb:78
                                                    • Float#round $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:26
                                                    • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:102
                                                      • NilClass#=== $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:104
                                                      • Float#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/numeric/conversions.rb:105
                                                    • ActiveRecord::LogSubscriber#colorize_payload_name $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:60
                                                      • NilClass#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:54
                                                      • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                        • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                        • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                    • ActiveRecord::LogSubscriber#sql_color $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:68
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:70
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:72
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:74
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:76
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:78
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:80
                                                      • Regexp#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:82
                                                    • ActiveRecord::LogSubscriber#color $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:104
                                                      • ActiveRecord::LogSubscriber#colorize_logging $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:69
                                                      • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:106
                                                    • NilClass#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:41
                                                    • ActiveRecord::LogSubscriber#debug $GemPath0/gems/activesupport-5.1.2/lib/active_support/log_subscriber.rb:94
                                                      • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                        • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                      • ActiveRecord::LogSubscriber#logger $GemPath0/gems/activerecord-5.1.2/lib/active_record/log_subscriber.rb:89
                                                        • ActiveRecord::Base.logger $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/module/attribute_accessors.rb:62
                                                      • 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-5.1.2/lib/active_support/logger.rb:24
                                                          • ActiveSupport::Logger#block (2 levels) in broadcast $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:24
                                                            • ActiveSupport::Logger#add $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:85
                                                              • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                              • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                  • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                    • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:101
                                                                    • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/logger.rb:85
                                                              • Kernel#nil? $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:86
                                                              • ActiveSupport::Logger#level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:27
                                                                • ActiveSupport::Logger#local_level $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:15
                                                                  • ActiveSupport::Logger#local_log_id $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:11
                                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger_thread_safe_level.rb:12
                                                                    • BasicObject#__id__ $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/tagged_logging.rb:20
                                                                    • ActiveSupport::Logger::SimpleFormatter#tags_text $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:51
                                                                      • ActiveSupport::Logger::SimpleFormatter#current_tags $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:45
                                                                        • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                        • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:48
                                                                      • Array#any? $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:53
                                                                    • NilClass#to_s $GemPath0/gems/activesupport-5.1.2/lib/active_support/tagged_logging.rb:21
                                                                    • ActiveSupport::Logger::SimpleFormatter#call $GemPath0/gems/activesupport-5.1.2/lib/active_support/logger.rb:101
                                                                      • Module#=== $GemPath0/gems/activesupport-5.1.2/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-5.1.2/lib/active_support/notifications/fanout.rb:46
                                            • ActiveSupport::Notifications::Fanout::Subscribers::Evented#finish $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications/fanout.rb:101
                                              • ActiveRecord::ExplainSubscriber#finish $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_subscriber.rb:10
                                                • ActiveRecord::ExplainRegistry.collect? $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:53
                                                  • ActiveRecord::ExplainRegistry.instance $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:44
                                                    • #<Class:Thread>#current $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                    • Thread#[] $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:45
                                                  • ActiveRecord::ExplainRegistry#collect? $GemPath0/gems/activerecord-5.1.2/lib/active_record/explain_registry.rb:21
                              • ActiveRecord::ConnectionAdapters::RealTransaction#commit $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:74
                                • ActiveRecord::ConnectionAdapters::TransactionState#set_state $GemPath0/gems/activerecord-5.1.2/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-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:82
                              • Array#uniq $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:83
                              • Array#shift $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:84
                              • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:93
                          • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                            • Monitor#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
                    • Monitor#mon_exit /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:197
                      • Monitor#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
            • ActiveRecord::ConnectionAdapters::TransactionState#committed? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/transaction.rb:14
            • Student#clear_transaction_record_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:413
              • Student#force_clear_transaction_record_state $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:419
                • Hash#clear $GemPath0/gems/activerecord-5.1.2/lib/active_record/transactions.rb:420