def get_default_base_name(self, viewset):
        queryset = getattr(viewset, 'queryset', None)
        if queryset is not None:
            get_url_name = getattr(queryset.model, 'get_url_name', None)
            if get_url_name is not None:
                return get_url_name()
        return super(SortedDefaultRouter, self).get_default_base_name(viewset)