'str'对象没有属性'_meta'

Question

def participant_specific(request, participant):
    helper = RelayFunctions()
    info = helper.participant_specific_donation(participant)
    info1 = helper.participant_specific_milestone(participant)

    data = { 'participant_specific_donation' : info , 'participant_specific_milestone' : info1 }
    json_serializer = serializers.get_serializer("json")()
    response = json_serializer.serialize(data, ensure_ascii=False)
    return HttpResponse(response, mimetype="application/json") 

Traceback:
 File "/home/vtrelayc/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response
   111.                         response = callback(request, *callback_args, **callback_kwargs)
 File "/home/vtrelayc/projects/relay/relayapp/views.py" in participant_specific
   192.     response = json_serializer.serialize(data, ensure_ascii=False)
 File "/home/vtrelayc/lib/python2.6/site-packages/django/core/serializers/base.py" in serialize
   46.             concrete_model = obj._meta.concrete_model

 Exception Type: AttributeError at /participants/specific/1/
 Exception Value: 'str' object has no attribute '_meta'

错误:'str'对象没有属性'_meta'

我们试图解析字典,但它说它是一个字符串？是因为一个字典中有多个对象吗？

Answer 1

json_serializer.serialize应该与查询集一起使用.更多信息在这里.

你应该能够达到同样的目的:

import json
data = json.dumps({ 'participant_specific_donation' : info , 'participant_specific_milestone' : info1 })

希望这可以帮助.

Answer 2

Django的序列化程序仅用于序列化QuerySets,但是你传递它dict.如果你想序列化一个dict,也许你正在寻找Python的内置json模块.