Parsing comma separated integers fails.

[Elagoht]

Thanks for course. But I noticed a problem with your approach to parse query parameters. currently this code will produce an error on this test

    def test_filter_by_invalid_tags_query(self):
        """Test filtering recipes by non integer tag queries."""

        params = {"tags": "noninteger,noninteger2"}
        res = self.client.get(RECIPES_URL, params)
        self.assertEqual(res.status_code, status.HTTP_400_BAD_REQUEST)

    def test_filter_by_invalid_ingredients_query(self):
        """Test filtering recipes by non integer ingredient queries."""

        params = {"ingredients": "invalid,invalid2"}
        res = self.client.get(RECIPES_URL, params)
        self.assertEqual(res.status_code, status.HTTP_400_BAD_REQUEST)

can be fixed by simply:

    def _params_to_ints(self, qs):
        """Convert a list of strings to integers."""

        from rest_framework.exceptions import ValidationError

        try:
            return [int(str_id) for str_id in qs.split(",")]
        except ValueError:
            raise ValidationError("Invalid parameter. Must be comma-separated integers.")

of course, using Django-Filter will be better.