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 ,"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