edoburu/django-fluent-pages — pull request #35 by vinnyrose (2014-06-04 14:34:20+00:00)
Title: Get the previous parent id if it is available on save.

This is in case _original_parent becomes unreliable.
This depends on a pull request in django-polymorphic-tree:
https://github.com/edoburu/django-polymorphic-tree/pull/17