composite-primary-keys/composite_primary_keys — pull request #264 by codeodor (2014-12-06 21:40:31+00:00)
Title: Update to support Rails 4.2.0.rc2 (fixes #262)

All green on MySQL, Postgres, and SQLite 3.

I didn't test it against RC1, so I don't know *for sure* it works on it, but it works against RC2, which had the same error described in #262.