def test_role(self):
        roles = RackRole.objects.all()[:2]
        params = {'role_id': [roles[0].pk, roles[1].pk]}
        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
        params = {'role': [roles[0].slug, roles[1].slug]}
        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)