• Object#block in __pry__ (pry):15
    • Student.unscope $GemPath0/gems/activerecord-5.1.2/lib/active_record/querying.rb:10
      • 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#unscope $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:386
        • 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#unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:391
          • Array#flatten! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:392
          • Student::ActiveRecord_Relation#unscope_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
            • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
              • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                • 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#unscope_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
          • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:395
            • Student::ActiveRecord_Relation#block in unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:395
              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:397
              • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:402
              • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:403
                • Student::ActiveRecord_Relation#block (2 levels) in unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:403
                  • Kernel#Array $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                  • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                    • Symbol#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                  • 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#except $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:27
                    • ActiveRecord::Relation::WhereClause#except_predicates_and_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:134
                      • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:138
                      • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                      • Enumerator#with_index $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                        • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                    • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:28
                      • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                  • Student::ActiveRecord_Relation#where_clause= $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:71
                    • Student::ActiveRecord_Relation#set_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:927
                      • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:934
    • Student::ActiveRecord_Relation#merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:29
      • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:30
      • 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#merge! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:39
        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:40
        • Kernel#is_a? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:42
        • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/spawn_methods.rb:43
          • ActiveRecord::Relation::Merger#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:45
            • Student::ActiveRecord_Relation#values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:632
              • Kernel#dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:633
                • Kernel#initialize_dup $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:633
                  • Hash#initialize_copy $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation.rb:633
        • ActiveRecord::Relation::Merger#merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:59
          • ActiveRecord::Relation::Merger#normal_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:55
          • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • Kernel#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
              • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
              • Symbol#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:70
              • Student::ActiveRecord_Relation#unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:391
                • Array#flatten! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:392
                • Student::ActiveRecord_Relation#unscope_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                  • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                    • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                      • 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#unscope_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
                • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:395
                  • Student::ActiveRecord_Relation#block in unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:395
                    • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:397
                    • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:402
                    • Hash#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:403
                      • Student::ActiveRecord_Relation#block (2 levels) in unscope! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:403
                        • Kernel#Array $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                        • Array#map $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                          • Symbol#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:408
                        • Student::ActiveRecord_Relation#where_clause $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
                          • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                        • ActiveRecord::Relation::WhereClause#except $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:27
                          • ActiveRecord::Relation::WhereClause#except_predicates_and_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:134
                            • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:138
                              • ActiveRecord::Relation::WhereClause#block in except_predicates_and_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:138
                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:141
                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:141
                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:141
                                • Module#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:141
                                • Enumerable#grep $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:142
                                  • Arel::Nodes::Equality#each $GemPath0/gems/arel-8.0.0/lib/arel/nodes/node.rb:54
                                    • Kernel#block_given? $GemPath0/gems/arel-8.0.0/lib/arel/nodes/node.rb:55
                                    • Class#new $GemPath0/gems/arel-8.0.0/lib/arel/nodes/node.rb:57
                                      • Arel::Visitors::DepthFirst#initialize $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:5
                                        • Arel::Visitors::DepthFirst#initialize $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:5
                                          • Arel::Visitors::DepthFirst#get_dispatch_cache $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:193
                                    • Arel::Visitors::DepthFirst#accept $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:9
                                      • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                        • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                          • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                          • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                          • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                          • Arel::Visitors::DepthFirst#binary $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:73
                                            • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                              • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                                • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                • Arel::Visitors::DepthFirst#visit_Arel_Attribute $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:109
                                                  • #<Class:0x007f5c67a0a5d0>#relation $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:110
                                                  • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                                    • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                                      • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                      • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                      • Arel::Visitors::DepthFirst#visit_Arel_Table $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:121
                                                        • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                                          • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                                            • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                            • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                            • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                            • Arel::Visitors::DepthFirst#terminal $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:125
                                                          • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                                    • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                                  • #<Class:0x007f5c67a0a5d0>#name $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:111
                                                  • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                                    • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                                      • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                      • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                      • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                      • Arel::Visitors::DepthFirst#terminal $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:125
                                                    • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                              • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                            • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:12
                                              • Arel::Visitors::DepthFirst#visit $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:29
                                                • Arel::Visitors::DepthFirst#dispatch $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:25
                                                • Kernel#class $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                • Kernel#hash $GemPath0/gems/arel-8.0.0/lib/arel/visitors/visitor.rb:30
                                                • Arel::Visitors::DepthFirst#terminal $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:125
                                              • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                        • Module#=== $GemPath0/gems/arel-8.0.0/lib/arel/visitors/depth_first.rb:14
                                • Kernel#kind_of? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:143
                                • #<Class:0x007f5c67a0a5d0>#name $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:144
                                • String#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:144
                                • Array#include? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:144
                                • Range#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/range/each.rb:3
                                  • Range#ensure_iteration_allowed $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/range/each.rb:15
                                    • Range#first $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/range/each.rb:16
                                    • Kernel#is_a? $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/range/each.rb:16
                                  • Range#each $GemPath0/gems/activesupport-5.1.2/lib/active_support/core_ext/range/each.rb:5
                                    • ActiveRecord::Relation::WhereClause#block (2 levels) in except_predicates_and_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:148
                            • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                            • Enumerator#with_index $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                              • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                                • ActiveRecord::Relation::WhereClause#block in except_predicates_and_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:158
                          • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:28
                            • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                        • Student::ActiveRecord_Relation#where_clause= $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:71
                          • Student::ActiveRecord_Relation#set_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:927
                            • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:934
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
            • ActiveRecord::Relation::Merger#block in merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:60
              • NilClass#nil? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:66
          • ActiveRecord::Relation::Merger#merge_multi_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:131
            • Student::ActiveRecord_Relation#reordering_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
            • 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: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! $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#first $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:65
                      • NilClass#to_s $GemPath0/gems/activerecord-5.1.2/lib/active_record/sanitization.rb:65
                      • String#include? $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
                • 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
                • 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
                • 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#extending_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
            • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:140
          • ActiveRecord::Relation::Merger#merge_single_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:143
            • 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#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
            • Student::ActiveRecord_Relation#from_clause= $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:71
              • Student::ActiveRecord_Relation#set_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:927
                • Student::ActiveRecord_Relation#assert_mutability! $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:934
            • Student::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#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#lock_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#create_with_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
            • Hash#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:149
          • ActiveRecord::Relation::Merger#merge_clauses $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:154
            • Array#each $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:155
              • ActiveRecord::Relation::Merger#block in merge_clauses $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:155
                • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                • ActiveRecord::Relation::WhereClause#merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:20
                  • ActiveRecord::Relation::WhereClause#predicates_unreferenced_by $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:99
                    • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:100
                  • ActiveRecord::Relation::WhereClause#non_conflicting_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:109
                    • ActiveRecord::Relation::WhereClause#referenced_columns $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:90
                      • Array#select $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:92
                      • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:93
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                          • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                            • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                            • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                              • Array#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                    • ActiveRecord::Relation::WhereClause#referenced_columns $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:90
                      • Array#select $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:92
                      • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:93
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                          • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                            • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                            • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                              • Array#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                    • Set#& /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:439
                      • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:440
                      • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:440
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                      • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                        • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                        • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                          • Set#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:322
                            • Hash#each_key /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:324
                    • Set#collect! /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:379
                      • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:380
                      • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:381
                      • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:381
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                          • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                            • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                            • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                              • Set#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:322
                                • Hash#each_key /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:324
                      • Set#replace /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:169
                        • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:170
                        • Kernel#instance_of? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:170
                        • Kernel#instance_variable_get /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:171
                        • Hash#replace /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:171
                    • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:112
                  • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:21
                    • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                • 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
              • ActiveRecord::Relation::Merger#block in merge_clauses $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:155
                • 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
                • 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#merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:20
                  • ActiveRecord::Relation::WhereClause#predicates_unreferenced_by $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:99
                    • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:100
                  • ActiveRecord::Relation::WhereClause#non_conflicting_binds $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:109
                    • ActiveRecord::Relation::WhereClause#referenced_columns $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:90
                    • ActiveRecord::Relation::WhereClause#referenced_columns $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:90
                    • Set#& /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:439
                      • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:440
                      • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:440
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • NilClass#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                      • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                        • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                        • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                          • Set#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:322
                            • Hash#each_key /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:324
                    • Set#collect! /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:379
                      • Kernel#block_given? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:380
                      • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:381
                      • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:381
                        • Set#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:83
                          • Class#new /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                            • Hash#initialize /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:84
                          • Kernel#nil? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:86
                          • Set#do_with_enum /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:112
                            • Kernel#respond_to? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:113
                            • Enumerable#each_entry /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:114
                              • Set#each /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:322
                                • Hash#each_key /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:324
                      • Set#replace /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:169
                        • Kernel#class /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:170
                        • Kernel#instance_of? /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:170
                        • Kernel#instance_variable_get /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:171
                        • Hash#replace /home/z/.rbenv/versions/2.4.0/lib/ruby/2.4.0/set.rb:171
                    • Array#reject $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:112
                  • Class#new $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:21
                    • ActiveRecord::Relation::WhereClause#initialize $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/where_clause.rb:8
                • 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
              • ActiveRecord::Relation::Merger#block in merge_clauses $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:155
                • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                • 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#merge $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/from_clause.rb:19
                • 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
          • ActiveRecord::Relation::Merger#merge_preloads $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:86
            • 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#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
          • ActiveRecord::Relation::Merger#merge_joins $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:107
            • Student::ActiveRecord_Relation#joins_values $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:67
              • Student::ActiveRecord_Relation#get_value $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:922
                • Student::ActiveRecord_Relation#default_value_for $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1180
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1182
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1184
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1186
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1188
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
                  • Symbol#=== $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/query_methods.rb:1190
            • Array#empty? $GemPath0/gems/activerecord-5.1.2/lib/active_record/relation/merger.rb:108