django orm如何作一个优雅一点的filter？

如果有N多fitler条件，

单独放在一个长语句里显然不好看。

还好，

django支持字典方式的过滤条件，

写法大约与单独的长语里差不多。

如下：

    def get_queryset(self):
        filter_dict = dict()

        if self.request.query_params.get('site_name'):
            filter_dict['site_name__name'] = self.request.query_params.get('site_name')
        if self.request.query_params.get('order_no'):
            filter_dict['order_no'] = self.request.query_params.get('order_no')
        if self.request.query_params.get('version_name'):
            if self.request.query_params.get('version_name') == "null":
                filter_dict['version_name__isnull'] = True
            else:
                filter_dict['version_name__name'] = self.request.query_params.get('version_name')
        # 以下过滤发布单的环境及时间(30天)
        # filter_dict['deploy_progress'] = u"待发布"
        filter_dict['deploy_status__in'] = ["UAT", "PRD", "SIM", "DRP", "BUILD"]
        current_date = timezone.now()
        filter_dict['change_date__gt'] = current_date - timedelta(days=3000)

        return DeployPool.objects.filter(**filter_dict)