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
13741	GenericForeignKey not working across multiple databases	bartek	nobody	"It seems that you can't use a !GenericForeignKey across multiple databases. My model is as follows:
{{{
class Item(Model):
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey()
    # Other model fields, irrelevant to this example.
}}}
From my tests, the following two scenarios happen:

Scenario 1: I use the content_object approach, which uses the actual !GenericForeignKey field to handle the data.

# Accessory is from a secondary database. I use routers to select it from the second database.
{{{
>>> a = Accessory.objects.get(pk=3)
>>> a
<Accessory: 1019 - Blue>
>>> i = Item(content_object=a, title=""Test item"")
>>> i.save()
>>> item = Item.objects.get(pk=1)
>>> item.content_object
<ATotallyDifferentModel: some_other_value>
>>> item.object_id
3L # This is correct
}}}
So it looks like it doesn't pick the right table to work with. It picks another model from the primary database, not going for the second database.

Scenario 2: I don't use content_object and set the id/type manually.
{{{
>>> ctype = ContentType.objects.get_for_model(Accessory)
>>> fi = Item.objects.create(object_id=a.pk, content_type=ctype, title=""Some real item."")
Traceback (most recent call last):
  File ""<console>"", line 1, in <module>
  File ""/home/bartek/.virtualenvs/internal/lib/python2.6/site-packages/django/db/models/manager.py"", line 138, in create
    return self.get_query_set().create(**kwargs)
  File ""/home/bartek/.virtualenvs/internal/lib/python2.6/site-packages/django/db/models/query.py"", line 352, in create
    obj.save(force_insert=True, using=self.db)
TypeError: save() got an unexpected keyword argument 'using'
}}}
So at this point I am at a loss. I asked around and no one knows if this is a bug or if I'm doing something wrong, so I am assuming it's a bug.
"		new	Contrib apps	1.2			contenttype,genericforeignkey		Unreviewed	0	0	0	0	0	0