class SearchFilter(LoginRequiredMixin, generic.ListView):
    def get_queryset(self):
        if self.request.method == 'GET':
            chek_box = self.request.GET.get('chek_box', None).strip()

        """"Код фильтра """
        if check_box:
            models = your_model_one
        else:
            models = your_model_two
        return models