If use more that 10 selection, that parse url: &id3__in=219&id4__in=223&id5__in=216&id6__in=218&id7__in=272&id8__in=217&id9__in=220&id10__in=222&__format=ext to q = {'id__in': [219, 223, 216, 218, 272, 217, 220], 'id1__in': ['222']}. id10__in parse to id1 field. Non-greedy regex fix it.