svenfuchs/simple_states — pull request #16 by ondrejbartas (2014-11-09 15:26:51+00:00)
Title: Look at [state]_at as second option for was_[state]?

We are storing objects in database and after reload,
we need to be able to tell which states object was in.

When you save object into database, you are loosing
information from past_states.