toastdriven/django-tastypie — pull request #899 by EyePulp (2013-04-10 20:30:32+00:00)
Title: Fix for ModelResource when it contains more than one m2m field pointing at the same sub-Resource

Fixes issue #898
When a ModelResource has multiple m2m's pointing at the same sub-Resource, a PUT or POST re-using the same sub-ModelResource across m2ms would result in only one m2m successfully creating the relationship.

- Added an optional uniqueness to the ModelResource.create_identifier()
via a field_name argument

- update the ModelResource.save_related() and ModelResource.save_m2m()
to make use of the optional field