Added a test case for testing parent_link and related_name links to parent.
All tests pass should pass now (at least they do for me on django 1.5 and python 2.7)
Now uses model._meta.parents to determine superclasses. _meta.parents is a dict of superclass: field_to_superclass pairs.
By using the field name of field_to_superclass, we can work out the field to use the django_polymorphic accessor on, even if a user-specified OneToOneField to parent is is used (with parent_link=True) to get to the parent in the inheritance hierarachy.
For subclasses, the path to the subclasses can be manually specified by the user if they use a 'related_name' on the OneToOneField from the subclass to the superclass. I have changed the code to also support 'related_name' if present
Removed compatibility_tools (because we aim to Python 2.7 and Python 3.2)
Performed 2to3 and modified
Usage of django.utils.six which adds dependency on Django >= 1.4.2
This builds on top of a fix in Django 1.6, and has a workaround for
Django 1.4 and 1.5. When the base class points to a model that no longer
exists, it will be silently dropped in the polymorphic queryset results.
This behavior is identical to iterating over results when the derived
table doesn't have the object anymore.
As more methods are added to the PolymorphicModel, the attr dict changes
ordering in the meta class. By making the ordering of managers
consistent, this problem no longer occurs.
* The custom manager was not assigned to _default_manager;
get_first_user_defined_manager() always returned None
* The PolymorphicManager couldn't remember it's custom queryset;
a RelatedManager creates a new instance of a manager, so the queryset
parameter should be known at class-level, not object level.
* The old method of providing a custom queryset class has been deprecated.
The reason polymorphic broke was because it couldn't find some managers
anymore in the inheritance tree. Django 1.5 removes these and replaces
them with an `AbstractManagerDescriptor`. This patch restores those objects
hottwaj
Diederik van der Boor
Bertrand Bordage
Gavin Wahl
Tomas Peterka
Chris Glass
floppya
Jedediah Smith