django-序列化参数为空报错问题

# 问题的起因是我后端设置如果参数为空不传。结果前端传给我空字符串。遂二次处理。
    def create(self, request, *args, **kwargs):
        try:
            request.data._mutable = True
        except Exception as e:
            logger.info(e)
        finally:
            for item in list(request.data):  # 防止序列化校验异常
                if not request.data[item] and request.data[item] != 0:
                    request.data.pop(item)
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)