mozilla/zamboni — pull request #1068 by diox (2013-08-29 17:19:52+00:00)
Title: Upgrade django-rest-framework to fix ChoiceField empty values issue (910381)

https://bugzilla.mozilla.org/show_bug.cgi?id=910381

My patch fixing this was accepted upstream but we can't really wait for a new release and this is tricky to deal with in our own code.