diff options
3 files changed, 41 insertions, 2 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 3c4f06ccf8..5aa905038d 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,22 @@ +* Includes HABTM returns correct size now. It's caused by the join dependency + only instantiates one HABTM object because the join table hasn't a primary key. + + Fixes #16032. + + Examples: + + before: + + Project.first.salaried_developers.size # => 3 + Project.includes(:salaried_developers).first.salaried_developers.size # => 1 + + after: + + Project.first.salaried_developers.size # => 3 + Project.includes(:salaried_developers).first.salaried_developers.size # => 3 + + *Bigxiang* + * Fix accessing of fixtures having non-string labels like Fixnum. *Prathamesh Sonpatki* diff --git a/activerecord/lib/active_record/associations/join_dependency.rb b/activerecord/lib/active_record/associations/join_dependency.rb index 4b75370171..85febcc771 100644 --- a/activerecord/lib/active_record/associations/join_dependency.rb +++ b/activerecord/lib/active_record/associations/join_dependency.rb @@ -150,7 +150,8 @@ module ActiveRecord message_bus.instrument('instantiation.active_record', payload) do result_set.each { |row_hash| - parent = parents[row_hash[primary_key]] ||= join_root.instantiate(row_hash, column_aliases) + parent_key = primary_key ? row_hash[primary_key] : row_hash + parent = parents[parent_key] ||= join_root.instantiate(row_hash, column_aliases) construct(parent, join_root, row_hash, result_set, seen, model_cache, aliases) } end @@ -232,7 +233,7 @@ module ActiveRecord end def construct(ar_parent, parent, row, rs, seen, model_cache, aliases) - primary_id = ar_parent.id + primary_id = ar_parent.id || row parent.children.each do |node| if node.reflection.collection? diff --git a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb index aea9207bfe..fb7630fc4a 100644 --- a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb +++ b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb @@ -902,4 +902,23 @@ class HasAndBelongsToManyAssociationsTest < ActiveRecord::TestCase DeveloperWithSymbolClassName.new end end + + def test_preloaded_associations_size + assert_equal Project.first.salaried_developers.size, + Project.preload(:salaried_developers).first.salaried_developers.size + + assert_equal Project.includes(:salaried_developers).references(:salaried_developers).first.salaried_developers.size, + Project.preload(:salaried_developers).first.salaried_developers.size + + # Nested HATBM + first_project = Developer.first.projects.first + preloaded_first_project = + Developer.preload(projects: :salaried_developers). + first. + projects. + detect { |p| p.id == first_project.id } + + assert preloaded_first_project.salaried_developers.loaded?, true + assert_equal first_project.salaried_developers.size, preloaded_first_project.salaried_developers.size + end end |