drugpl/call4papers — comment on commit 85eb34cbd12bf265118769793c277ea67750f7fc
File: app/models/paper.rb line 2
By paneq:

As far as I remember it did not work without for some reason and I was really pissed off about it and spent too much time figuring out what's wrong. I remember it working in Rails 3.0 without it. Probably the reason is that id is String (not Integer) and Rails is sometimes getting more stupid instead of smarter with release. So that's it :)