composite-primary-keys/composite_primary_keys — pull request #236 by tomhughes (2014-09-12 13:59:00+00:00)
Title: Implement id_was for rails 4.1.6 compatibility

An `id_was` method has been added which, in the default version, passes the name of the primary key attribute to `attribute_was` but when CPK is in use that winds up passing a flattened string of the list of keys, which CPK's custom `attribute_was` doesn't recognise and handle.