diff options
| -rw-r--r-- | activerecord/lib/active_record/associations/preloader.rb | 1 | ||||
| -rw-r--r-- | activerecord/test/cases/associations/has_many_through_associations_test.rb | 9 |
2 files changed, 9 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations/preloader.rb b/activerecord/lib/active_record/associations/preloader.rb index 5c2ac5b374..d4d1b2a282 100644 --- a/activerecord/lib/active_record/associations/preloader.rb +++ b/activerecord/lib/active_record/associations/preloader.rb @@ -88,7 +88,6 @@ module ActiveRecord if records.empty? [] else - records.uniq! Array.wrap(associations).flat_map { |association| preloaders_on association, records, preload_scope } 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 d5573b6d02..442f4a93d4 100644 --- a/activerecord/test/cases/associations/has_many_through_associations_test.rb +++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb @@ -71,6 +71,15 @@ class HasManyThroughAssociationsTest < ActiveRecord::TestCase club1.members.sort_by(&:id) end + def test_preload_multiple_instances_of_the_same_record + club = Club.create!(name: "Aaron cool banana club") + Membership.create! club: club, member: Member.create!(name: "Aaron") + Membership.create! club: club, member: Member.create!(name: "Bob") + + preloaded_clubs = Club.joins(:memberships).preload(:membership).to_a + assert_no_queries { preloaded_clubs.each(&:membership) } + end + def test_ordered_has_many_through person_prime = Class.new(ActiveRecord::Base) do def self.name; "Person"; end |