django-extensions/django-extensions — pull request #141 by bricetebbs (2011-10-18 00:15:00+00:00)
Title: JSON field failing in django 1.3.1 

Its possible I just wasn't using it correctly but the problem seems to have been introduced in:
https://github.com/django-extensions/django-extensions/commit/db549c0c6a0ac5ca963187bbded9aeb2e05daff8

Borrowed the idea from:
https://github.com/bradjasper/django-jsonfield/blob/master/jsonfield/fields.py

Also added a crappy test since I couldn't find any for JsonField

Seems to work in 1.3.1 and django-trunk now.