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-rw-r--r--activerecord/test/cases/associations/join_model_test.rb4
1 files changed, 4 insertions, 0 deletions
diff --git a/activerecord/test/cases/associations/join_model_test.rb b/activerecord/test/cases/associations/join_model_test.rb
index 0a57c7883f..58542bc939 100644
--- a/activerecord/test/cases/associations/join_model_test.rb
+++ b/activerecord/test/cases/associations/join_model_test.rb
@@ -512,6 +512,10 @@ class AssociationsJoinModelTest < ActiveRecord::TestCase
assert_nothing_raised { vertices(:vertex_1).sinks << vertices(:vertex_5) }
end
+ def test_add_to_join_table_with_no_id
+ assert_nothing_raised { vertices(:vertex_1).sinks << vertices(:vertex_5) }
+ end
+
def test_has_many_through_collection_size_doesnt_load_target_if_not_loaded
author = authors(:david)
assert_equal 10, author.comments.size