如何使用django活塞返回格式化的错误消息和正确的HTTP代码?

你怎么看这样的事情:

# -*- coding: utf-8 -*-
from piston.handler import typemapper
from piston.emitters import Emitter

def getErrorResponse(http_code, payload, em_format='json'):
        emitter, ct = Emitter.get(em_format)
        srl = emitter(payload, typemapper, handler=None, anonymous=False)
        r = srl.render({})
        return HttpResponse(r, content_type=ct, status=http_code)

像这样使用:

return getErrorResponse(404, {'status': 0,'message': 'This restaurant does not exists.'})

实际上,hander方法可以通过在handler函数中添加带有emitter\u format属性的来获取此信息。

...
    def read(self, request, emitter_format=None):
        if emitter_format is None:
            emitter_format = request.GET.get('format', 'json')

        ...
        return getErrorResponse(404, {'status': 0,'message': 'This restaurant does not exists.'}, emitter_format)