Get exception when initializing a GenericForeignKey using Model.get_or_create()

[niklas@…]

This call will generate an exception because the content_object is not found as field

Property.objects.get_or_create(name=property_name, content_object=self)

This would work fine however (if self is in db as owner of Property):

p = Property(name=property_name, content_object=self)

The last line of the exception is interesting:
TypeError: Cannot resolve keyword 'content_object' into field. Choices are: anexampleowner, resource, id, name, content_type, object_id

It seems that, for some reason, here the variable referring to AnExampleOwner class has been named after the class, i.e.
anexampleowner. Is this by design?

Hee is the code:

class Property(models.Model):

name = models.CharField(max_length=200)#, core=True)
content_object = generic.GenericForeignKey()
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()

class AnExampleOwner(models.Model, Owner):

res_props = generic.GenericRelation(Property)
name = models.CharField(max_length=200)

def get_or_create_property(self, property_name):

return Property.objects.get_or_create(name=property_name, content_object=self)

p = mr_dummy.get_or_create_property('description')

File "S:\nc\Projects\Inventive\Ticmate\svn\ticmate\trunk\source\python\ticmate\django\apps\resources\tests.py", line 16, in ticmate.django.apps.resources.tests
Failed example:

p = mr_dummy.get_or_create_property('description')

Exception raised:

Traceback (most recent call last):

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\test\_doctest.py", line 1267, in run

compileflags, 1) in test.globs

File "<doctest ticmate.django.apps.resources.tests[4]>", line 1, in <module>

p = mr_dummy.get_or_create_property('description')

File "S:\nc\Projects\Inventive\Ticmate\svn\ticmate\trunk\source\python\ticmate\django\apps\resources\models.py", line 206, in get_or_create_property

return Property.objects.get_or_create(name=property_name, content_object=self)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\manager.py", line 72, in get_or_create

return self.get_query_set().get_or_create(kwargs)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 286, in get_or_create

return self.get(kwargs), False

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 261, in get

obj_list = list(clone)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 114, in iter

return iter(self._get_data())

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 483, in _get_data

self._result_cache = list(self.iterator())

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 180, in iterator

select, sql, params = self._get_sql_clause()

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 498, in _get_sql_clause

joins2, where2, params2 = self._filters.get_sql(opts)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 720, in get_sql

joins2, where2, params2 = val.get_sql(opts)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 771, in get_sql

return parse_lookup(self.kwargs.items(), opts)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 926, in parse_lookup

joins2, where2, params2 = lookup_inner(path, lookup_type, value, opts, opts.db_table, None)

File "S:\nc\Projects\Inventive\Ticmate\svn\django-trunk\django\db\models\query.py", line 1044, in lookup_inner

raise TypeError, "Cannot resolve keyword '%s' into field. Choices are: %s" % (name, ", ".join(choices))

TypeError: Cannot resolve keyword 'content_object' into field. Choices are: anexampleowner, resource, id, name, content_type, object_id

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