diff options
Diffstat (limited to 'activerecord/test/cases')
-rw-r--r-- | activerecord/test/cases/associations/inner_join_association_test.rb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/inner_join_association_test.rb b/activerecord/test/cases/associations/inner_join_association_test.rb index b65af4b819..166a59ec7b 100644 --- a/activerecord/test/cases/associations/inner_join_association_test.rb +++ b/activerecord/test/cases/associations/inner_join_association_test.rb @@ -69,6 +69,16 @@ class InnerJoinAssociationTest < ActiveRecord::TestCase assert_equal [expected], Person.joins(string_join).joins(agents.create_join(agents, agents.create_on(constraint))) end + def test_deduplicate_joins + posts = Post.arel_table + constraint = posts[:author_id].eq(Author.arel_attribute(:id)) + + authors = Author.joins(posts.create_join(posts, posts.create_on(constraint))) + authors = authors.joins(:author_address).merge(authors.where("posts.type": "SpecialPost")) + + assert_equal [authors(:david)], authors + end + def test_construct_finder_sql_ignores_empty_joins_hash sql = Author.joins({}).to_sql assert_no_match(/JOIN/i, sql) |