• Object#block in __pry__ (pry):43
    • Student.first $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:3
      • Student.all $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/named.rb:24
        • Student.current_scope $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:13
          • ActiveRecord::Scoping::ScopeRegistry.value_for $GemPath0/gems/activesupport-5.1.2/lib/active_support/per_thread_registry.rb:53
            • ActiveRecord::Scoping::ScopeRegistry.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::Scoping::ScopeRegistry#value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:78
              • ActiveRecord::Scoping::ScopeRegistry#raise_invalid_scope_type! $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:97
                • Array#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:98
              • Student.base_class $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:95
                • Module#< $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:96
                • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:100
                • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:100
                • ApplicationRecord.abstract_class? $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:125
              • Module#<= $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:82
              • Module#name $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:83
              • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:85
              • Module#<= $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping.rb:82
        • Student.default_scoped $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/named.rb:32
          • 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.build_default_scope $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/default.rb:104
            • Student.abstract_class? $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:125
            • Student.default_scope_override -> 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
            • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/default.rb:107
            • Student.default_scope_override -> 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.default_scopes -> 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
            • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/scoping/default.rb:118
      • Student::ActiveRecord_Relation#first $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:118
        • Student::ActiveRecord_Relation#find_nth $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:530
          • Student::ActiveRecord_Relation#offset_index $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:354
            • 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#find_nth_with_limit $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:534
            • 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
            • 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#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:0x007f243a6c6820>>#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::Attributes::Attribute#asc $GemPath0/gems/arel-8.0.0/lib/arel/order_predications.rb:5
              • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/order_predications.rb:6
                • Arel::Nodes::Ascending#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:8
                  • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:9
            • Student::ActiveRecord_Relation#order $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:315
              • Student::ActiveRecord_Relation#check_if_method_has_arguments! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1162
                • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1163
              • 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#order! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:320
                • Student::ActiveRecord_Relation#preprocess_order_args $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1115
                  • Array#map! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1116
                    • Student::ActiveRecord_Relation#block in preprocess_order_args $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1116
                      • Student.sanitize_sql_for_order $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:64
                        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:65
                  • Array#flatten! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1119
                  • Student::ActiveRecord_Relation#validate_order_args $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1105
                    • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1106
                      • Student::ActiveRecord_Relation#block in validate_order_args $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1106
                        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1107
                  • Enumerable#grep $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1122
                    • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1122
                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1122
                  • Array#map! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1123
                  • Array#compact! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1123
                  • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1124
                  • Array#map! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1127
                    • Student::ActiveRecord_Relation#block in preprocess_order_args $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1127
                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1129
                      • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1131
                  • Array#flatten! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1143
                • 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
                • Student::ActiveRecord_Relation#order_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#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
            • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:544
            • Numeric#zero? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:545
            • Student::ActiveRecord_Relation#limit $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:685
              • 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#limit! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:689
                • Student::ActiveRecord_Relation#limit_value= $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#to_a $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:250
              • Student::ActiveRecord_Relation#records $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:254
                • Student::ActiveRecord_Relation#load $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:545
                  • Student::ActiveRecord_Relation#exec_queries $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:658
                    • Student::ActiveRecord_Relation#eager_loading? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:597
                      • Student::ActiveRecord_Relation#eager_load_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
                      • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:599
                      • Student::ActiveRecord_Relation#includes_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
                      • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:600
                    • 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
                            • 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
                        • 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#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
                        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:947
                          • BasicObject#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:947
                        • Arel::SelectManager#take $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:218
                          • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:220
                            • Arel::Nodes::Limit#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:8
                              • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:9
                          • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:221
                            • Arel::Nodes::Top#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:8
                              • BasicObject#initialize $GemPath0/gems/arel-8.0.0/lib/arel/nodes/unary.rb:9
                        • 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
                          • 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
                            • Arel::Nodes::Ascending#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:16
                              • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:17
                          • Arel::SelectManager#order $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:168
                            • Array#map $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:170
                              • Arel::SelectManager#block in order $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:170
                                • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:171
                                • Array#include? $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:171
                            • Array#concat $GemPath0/gems/arel-8.0.0/lib/arel/select_manager.rb:170
                        • 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:0x007f243a6c6820>>#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
                    • 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#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#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
                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#sanitize_limit $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:332
                        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:333
                      • ActiveRecord::Type.default_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/type.rb:43
                      • ActiveRecord::Attribute.with_cast_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:12
                        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:13
                          • ActiveRecord::Attribute::WithCastValue#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:29
                      • 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#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#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
                    • Student.find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:38
                      • 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.sanitize_sql_for_conditions $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:22
                        • Arel::SelectManager#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:16
                          • Kernel#respond_to? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:17
                        • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:26
                      • Module#name $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:39
                      • ActiveRecord::ConnectionAdapters::SQLite3Adapter#select_all $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/query_cache.rb:91
                        • ActiveRecord::ConnectionAdapters::SQLite3Adapter#select_all $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:31
                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#binds_from_relation $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:377
                            • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:378
                          • 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#visit_Arel_Nodes_SelectStatement $GemPath0/gems/arel-8.0.0/lib/arel/visitors/sqlite.rb:12
                                    • Arel::Visitors::SQLite#visit_Arel_Nodes_SelectStatement $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:188
                                      • Enumerable#inject $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:194
                                        • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:194
                                          • Arel::Visitors::SQLite#block in visit_Arel_Nodes_SelectStatement $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:194
                                            • Arel::Visitors::SQLite#visit_Arel_Nodes_SelectCore $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:218
                                              • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                              • Arel::Visitors::SQLite#maybe_visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:789
                                                • 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_Top $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:390
                                              • Arel::Visitors::SQLite#maybe_visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:789
                                              • Arel::Visitors::SQLite#collect_nodes_for $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:243
                                                • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                                • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:247
                                                  • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:247
                                                    • Arel::Visitors::SQLite#block in collect_nodes_for $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:247
                                                      • 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:0x007f243a6c6820>#relation $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:705
                                                          • #<Class:0x007f243a6c6820>#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:0x007f243a6c6820>#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::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                              • Arel::Nodes::JoinSource#empty? $GemPath0/gems/arel-8.0.0/lib/arel/nodes/join_source.rb:14
                                              • 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_JoinSource $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:521
                                                  • 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
                                                  • Array#any? $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:525
                                              • Arel::Visitors::SQLite#collect_nodes_for $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:243
                                              • Arel::Visitors::SQLite#collect_nodes_for $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:243
                                              • Arel::Visitors::SQLite#collect_nodes_for $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:243
                                      • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                      • Enumerable#each_with_index $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:201
                                        • Array#each $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:201
                                          • Arel::Visitors::SQLite#block in visit_Arel_Nodes_SelectStatement $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:201
                                            • 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_Ascending $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:411
                                                • 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:0x007f243a6c6820>#relation $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:705
                                                    • #<Class:0x007f243a6c6820>#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:0x007f243a6c6820>#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
                                                • ActiveRecord::ConnectionAdapters::AbstractAdapter::SQLString#<< $GemPath0/gems/arel-8.0.0/lib/arel/collectors/plain_string.rb:13
                                      • Arel::Visitors::SQLite#visit_Arel_Nodes_SelectOptions $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:212
                                        • Arel::Visitors::SQLite#maybe_visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:789
                                          • 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_Limit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:384
                                              • 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
                                        • Arel::Visitors::SQLite#maybe_visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:789
                                        • Arel::Visitors::SQLite#maybe_visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/to_sql.rb:789
                            • 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
                          • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:34
                          • ActiveRecord::ConnectionAdapters::SQLite3Adapter#select_prepared $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/abstract/database_statements.rb:364
                            • 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::Attribute::WithCastValue#value_for_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:50
                                      • ActiveRecord::Attribute::WithCastValue#value $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:36
                                        • ActiveRecord::Attribute::WithCastValue#type_cast $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute.rb:182
                                      • ActiveModel::Type::Value#serialize $GemPath0/gems/activemodel-5.1.2/lib/active_model/type/value.rb:43
                                    • 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
                                        • 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::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
                                                  • ActiveRecord::ConnectionAdapters::SQLite3Adapter::StatementPool#[] $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/statement_pool.rb:21
                                                    • ActiveRecord::ConnectionAdapters::SQLite3Adapter::StatementPool#cache $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/statement_pool.rb:50
                                                      • #<Class:Process>#pid $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/statement_pool.rb:51
                                                  • SQLite3::Statement#reset! $GemPath0/gems/activerecord-5.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:228
                                                  • 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:230
                                                    • 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#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
                                                  • 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
                                        • Thread::Mutex#unlock /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/monitor.rb:202
                                  • 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::Value#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
                                                  • 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
                      • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:40
                        • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:40
                          • Hash#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:40
                      • 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
                      • Hash#each_key $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                          • Hash#delete $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:41
                      • ActiveSupport::Notifications.instrumenter $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications.rb:187
                        • ActiveSupport::Notifications::InstrumentationRegistry.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::InstrumentationRegistry#instrumenter_for $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications.rb:207
                          • Kernel#hash $GemPath0/gems/activesupport-5.1.2/lib/active_support/notifications.rb:208
                      • ActiveRecord::Result#length $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:45
                      • Module#name $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:46
                      • 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
                        • Student.block in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:49
                          • Enumerable#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:50
                            • ActiveRecord::Result#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:53
                              • Kernel#block_given? $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:54
                              • ActiveRecord::Result#hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:121
                                • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                      • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                        • String#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                    • String#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:126
                                • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:127
                                  • ActiveRecord::Result#block in hash_rows $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:127
                              • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:55
                                • ActiveRecord::Result#block in each $GemPath0/gems/activerecord-5.1.2/lib/active_record/result.rb:55
                                  • Student.block (2 levels) in find_by_sql $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:50
                                    • Student.instantiate $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:66
                                      • Student.discriminate_class_for_record $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:175
                                        • Student.using_single_table_inheritance? $GemPath0/gems/activerecord-5.1.2/lib/active_record/inheritance.rb:183
                                          • Student.inheritance_column $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:275
                                            • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:276
                                            • ApplicationRecord.inheritance_column $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:275
                                              • Class#superclass $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:276
                                              • ActiveRecord::Base.inheritance_column $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:275
                                          • NilClass#present? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:23
                                            • NilClass#blank? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/object/blank.rb:54
                                        • Student.discriminate_class_for_record $GemPath0/gems/activerecord-5.1.2/lib/active_record/persistence.rb:78
                                      • Student.attributes_builder $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:334
                                      • ActiveRecord::AttributeSet::Builder#build_from_database $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:14
                                        • Hash#key? $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:15
                                        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:19
                                          • ActiveRecord::LazyAttributeHash#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:28
                                        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/builder.rb:20
                                          • ActiveRecord::AttributeSet#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set.rb:8
                                      • Student.allocate $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:153
                                        • Student.define_attribute_methods $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods.rb:55
                                        • Class#allocate $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:155
                                      • Student#init_with $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:357
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:358
                                        • ActiveRecord::LegacyYamlAdapter.convert $GemPath0/gems/activerecord-5.1.2/lib/active_record/legacy_yaml_adapter.rb:3
                                          • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/legacy_yaml_adapter.rb:4
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:359
                                        • Student.yaml_encoder $GemPath0/gems/activerecord-5.1.2/lib/active_record/model_schema.rb:357
                                        • ActiveRecord::AttributeSet::YAMLEncoder#decode $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_set/yaml_encoder.rb:20
                                        • Student#init_internals $GemPath0/gems/activerecord-5.1.2/lib/active_record/aggregations.rb:22
                                          • Student#init_internals $GemPath0/gems/activerecord-5.1.2/lib/active_record/associations.rb:292
                                            • Student#init_internals $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:556
                                        • Kernel#class $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:365
                                        • Student.define_attribute_methods $GemPath0/gems/activerecord-5.1.2/lib/active_record/attribute_methods.rb:55
                                        • Kernel#block_given? $GemPath0/gems/activerecord-5.1.2/lib/active_record/core.rb:367
                                        • Student#_run_find_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#_run_initialize_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
                        • 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
                    • Kernel#freeze $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:659
                    • Student::ActiveRecord_Relation#preload_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
                    • Student::ActiveRecord_Relation#eager_loading? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:597
                      • Student::ActiveRecord_Relation#eager_load_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
                      • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:599
                      • Student::ActiveRecord_Relation#includes_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
                      • Array#any? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:600
                    • Student::ActiveRecord_Relation#includes_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
                    • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:664
                    • Student::ActiveRecord_Relation#readonly_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
              • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:251
                • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:251
                  • Array#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:251
          • Array#first $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/finder_methods.rb:531