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Code Issues 25 Releases Wiki Activity

Fixed #24002 -- GenericRelation filtering targets related model's pk

Browse Source 
Previously Publisher.objects.filter(book=val) would target
book.object_id if book is a GenericRelation. This is inconsistent to
filtering over reverse foreign key relations, where the target is the
related model's primary key.
This commit is contained in:
Anssi Kääriäinen 2014-12-17 09:47:58 +02:00
parent 104aaab704
commit 1c5cbf5e5d
2 changed files with 15 additions and 3 deletions
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2
django/contrib/contenttypes/fields.py
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@ -307,7 +307,7 @@ class GenericRelation(ForeignObject):
def get_path_info(self):
opts = self.rel.to._meta
target = opts.get_field_by_name(self.object_id_field_name)[0]
target = opts.pk
return [PathInfo(self.model._meta, opts, (target,), self.rel, True, False)]
def get_reverse_path_info(self):

16
tests/generic_relations_regress/tests.py
View File

@ -220,15 +220,18 @@ class GenericRelationTests(TestCase):
def test_annotate(self):
hs1 = HasLinkThing.objects.create()
hs2 = HasLinkThing.objects.create()
HasLinkThing.objects.create()
b = Board.objects.create(name=str(hs1.pk))
Link.objects.create(content_object=hs2)
l = Link.objects.create(content_object=hs1)
Link.objects.create(content_object=b)
qs = HasLinkThing.objects.annotate(Sum('links'))
qs = HasLinkThing.objects.annotate(Sum('links')).filter(pk=hs1.pk)
# If content_type restriction isn't in the query's join condition,
# then wrong results are produced here as the link to b will also match
# (b and hs1 have equal pks).
self.assertEqual(qs.count(), 1)
self.assertEqual(qs[0].links__sum, hs1.id)
self.assertEqual(qs[0].links__sum, l.id)
l.delete()
# Now if we don't have proper left join, we will not produce any
# results at all here.
@ -241,6 +244,15 @@ class GenericRelationTests(TestCase):
self.assertEqual(qs.filter(links__sum__isnull=True).count(), 1)
self.assertEqual(qs.filter(links__sum__isnull=False).count(), 0)
def test_filter_targets_related_pk(self):
HasLinkThing.objects.create()
hs2 = HasLinkThing.objects.create()
l = Link.objects.create(content_object=hs2)
self.assertNotEqual(l.object_id, l.pk)
self.assertQuerysetEqual(
HasLinkThing.objects.filter(links=l.pk),
[hs2], lambda x: x)
def test_editable_generic_rel(self):
GenericRelationForm = modelform_factory(HasLinkThing, fields='__all__')
form = GenericRelationForm()