def test_flatpage_admin_form_edit(self):
"""
Existing flatpages can be edited in the admin form without triggering
the url-uniqueness validation.
"""
existing = FlatPage.objects.create(
url="/myflatpage1/", title="Some page", content="The content")
existing.sites.add(settings.SITE_ID)
data = dict(url='/myflatpage1/', **self.form_data)
f = FlatpageForm(data=data, instance=existing)
self.assertTrue(f.is_valid(), f.errors)
updated = f.save()
self.assertEqual(updated.title, "A test page")
