Django 1.11 uses the old manager inheritance system, unless it's
overwritten with manager_inheritance_from_future. With a class layout
like:
PolymorphicModel (abstract)
PolymorphicMPTTModel (abstract)
GenericCustomer (concrete, has objects = ...)
CustomerGroupBase (abstract, has objects = ...)
Partner (concrete, no manager)
BranchPartner (concrete, no manager)
The last level gets a normal Django Manager instead of the polymorphic
manager. Because the PolymorphicModel had a base_objects manager, this
was typically used as _default_manager. Now that the default manager is
no longer affected, it's also easier to detect why the "objects" doesn't
get the proper manager type. Using "manager_inheritance_from_future" is
recommended instead to have both the right behavior and forward
Django 2.x compatibility.
When using .defer on a PolymorphicQuerySet with multiple childs that
subclass from the same polymorphic parent model yield an error like:
>>> Base.objects.defer('ModelY___field_y')
Traceback (most recent call last):
...
FieldDoesNotExist: ModelX has no field named 'field_y'
I'm a little concerned that this loses some of the efficiencies (in
particular, chunking) from previous versions. That's something that can
probably be improved.
Thanks to @vdboor for the suggestion.
Also:
- Add missing `using` kwargs in query_translate functions.
- Add a couple unit tests for non-default database functionality.
This is unwanted behavior, and django provides much better methods for
it instead. (PolymorphicQuerySet.as_manager() / PolymorphicManager.from_queryset()
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.
Diederik van der Boor
Krzysztof Gromadzki
trbs
Jerome Leclanche
Charlie Denton
Diederik van der Boor
un.def
Austin Matsick
Alex Alvarez
slide333333
Frankie Dintino
Jonas Haag
Sander van Leeuwen
tyaslab
ellmetha
Gavin Wahl
Tomas Peterka