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3 files changed, 23 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index d4f4041910..f780029a18 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,10 @@ +* Previously, when building records using a `has_many :through` association, + if the child records were deleted before the parent was saved, they would + still be persisted. Now, if child records are deleted before the parent is saved + on a `has_many :through` association, the child records will not be persisted. + + *Tobias Kraze* + * Merging two relations representing nested joins no longer transforms the joins of the merged relation into LEFT OUTER JOIN. Example to clarify: diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb index 53ffb3b68d..2fd20b4368 100644 --- a/activerecord/lib/active_record/associations/has_many_through_association.rb +++ b/activerecord/lib/active_record/associations/has_many_through_association.rb @@ -109,6 +109,11 @@ module ActiveRecord record end + def remove_records(existing_records, records, method) + super + delete_through_records(records) + end + def target_reflection_has_associated_record? !(through_reflection.belongs_to? && owner[through_reflection.foreign_key].blank?) end diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb index 9156f6d57a..1c2138a3d0 100644 --- a/activerecord/test/cases/associations/has_many_through_associations_test.rb +++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb @@ -319,6 +319,17 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase assert_includes post.single_people, person end + def test_build_then_remove_then_save + post = posts(:thinking) + post.people.build(first_name: "Bob") + ted = post.people.build(first_name: "Ted") + post.people.delete(ted) + post.save! + post.reload + + assert_equal ["Bob"], post.people.collect(&:first_name) + end + def test_both_parent_ids_set_when_saving_new post = Post.new(title: "Hello", body: "world") person = Person.new(first_name: "Sean") |