Может кто подсказать https://ru.stackoverflow.com/questions/1299040/django-queryset-%d0%ba%d0%b0%d0%ba-%d0%bf%d0%be%d1%81%d1%87%d0%b8%d1%82%d0%b0%d1%82%d1%8c-%d1%81%d0%bf%d0%b8%d1%81%d0%be%d0%ba