diff options
| -rw-r--r-- | activerecord/CHANGELOG.md | 22 | ||||
| -rw-r--r-- | activerecord/lib/active_record/associations/preloader/through_association.rb | 3 | ||||
| -rw-r--r-- | activerecord/test/cases/associations/eager_test.rb | 6 |
3 files changed, 30 insertions, 1 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 67f3d47d10..8f3c6e78f7 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -1,3 +1,25 @@ +* Preloading `has_many :through` associations with conditions won't + cache the `:through` association. This will prevent invalid + subsets to be cached. + Fixes #8423. + + Example: + + class User + has_many :posts + has_many :recent_comments, -> { where('created_at > ?', 1.week.ago) }, :through => :posts + end + + a_user = User.includes(:recent_comments).first + + # this is preloaded + a_user.recent_comments + + # fetching the recent_comments through the posts association won't preload it. + a_user.posts + + *Yves Senn* + * Fix counter cache columns not updated when replacing `has_many :through` associations. Backport #8400. diff --git a/activerecord/lib/active_record/associations/preloader/through_association.rb b/activerecord/lib/active_record/associations/preloader/through_association.rb index ad6374d09a..0f1336bd00 100644 --- a/activerecord/lib/active_record/associations/preloader/through_association.rb +++ b/activerecord/lib/active_record/associations/preloader/through_association.rb @@ -37,7 +37,8 @@ module ActiveRecord through_records = Array.wrap(owner.send(through_reflection.name)) # Dont cache the association - we would only be caching a subset - if reflection.options[:source_type] && through_reflection.collection? + if (through_scope != through_reflection.klass.unscoped) || + (reflection.options[:source_type] && through_reflection.collection?) owner.association(through_reflection.name).reset end diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb index 20c6b691fc..5d07ffa241 100644 --- a/activerecord/test/cases/associations/eager_test.rb +++ b/activerecord/test/cases/associations/eager_test.rb @@ -1112,4 +1112,10 @@ class EagerAssociationTest < ActiveRecord::TestCase Post.includes(:comments).order(nil).where(:comments => {:body => "Thank you for the welcome"}).first end end + + test "preloading does not cache has many association subset when preloaded with a through association" do + author = Author.includes(:comments_with_order_and_conditions, :posts).first + assert_no_queries { assert_equal 2, author.comments_with_order_and_conditions.size } + assert_no_queries { assert_equal 5, author.posts.size, "should not cache a subset of the association" } + end end |