django-mptt

[bckohan]

The author of django-mptt encourages the use of django-tree-queries instead and claims to no longer maintain django-mptt despite recent updates. The old advice for using polymorphic models with django-mptt is as follows:

Combining polymorphic with django-mptt is certainly possible, but not straightforward.
It involves combining both managers, querysets, models, meta-classes and admin classes
using multiple inheritance.

The django-polymorphic-tree package provides this out of the box.