search for: join_table_seq

...tablea(id), tableb_id integer references tableb(id), other_attributes... When Rails writes to join_table, I''d expect it to do something like: INSERT INTO join_table (tablea_id, tableb_id) values (123,456) or maybe INSERT INTO join_table (id, tablea_id, tableb_id) values (nextval(''join_table_seq''), 123, 456) Instead, it''s doing something like INSERT INTO join_table (id, tablea_id, tableb_id) values (123, 123, 456) with the result that id isn''t being allowed to default to it''s correct serial value, but is instead having the value of tablea_id written to...