[lolinder]

Supposedly the behavior hasn't changed since at least version 1.8:

https://docs.djangoproject.com/en/1.8/ref/models/fields/#uui...

It may not have worked correctly on your project for some reason?

[throwawaymaths]

Actually now that I remember we were using MySQL and I was pushing for migrating to postgres partially for this reason, sorry it was a long time ago in startup time