id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
21893	Migrations RunPython operations seem to trip on MTI models.	loic84	Loic Bistuer <loic.bistuer@…>	"The attached tests demonstrate 2 issues:

- The pk isn't assigned after a call to `objects.create()`, although I can confirm that the object is properly created.

{{{
pony = ShetlandPony.objects.create()
self.assertIsNot(pony.pk, None)
}}}

- `objects.create()` doesn't accept any arguments that refer to superclasses' fields:

{{{
>>> pony = ShetlandPony.objects.create(weight=5)
Traceback (most recent call last):
  File ""/Users/loic/Dev/django/tests/migrations/test_operations.py"", line 544, in test_run_python
    operation.database_forwards(""test_runpython"", editor, project_state, new_state)
  File ""/Users/loic/Dev/django/django/db/migrations/operations/special.py"", line 141, in database_forwards
    self.code(models=from_state.render(), schema_editor=schema_editor)
  File ""/Users/loic/Dev/django/tests/migrations/test_operations.py"", line 538, in create_shetlandponies
    pony2 = ShetlandPony.objects.create(weight=5)
  File ""/Users/loic/Dev/django/django/db/models/manager.py"", line 92, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File ""/Users/loic/Dev/django/django/db/models/query.py"", line 364, in create
    obj = self.model(**kwargs)
  File ""/Users/loic/Dev/django/django/db/models/base.py"", line 465, in __init__
    raise TypeError(""'%s' is an invalid keyword argument for this function"" % list(kwargs)[0])
TypeError: 'weight' is an invalid keyword argument for this function
}}}"	Bug	closed	Migrations	1.7-alpha-1	Normal	fixed			Accepted	1	0	0	0	0	0