python – DRF TypeError’type’对象不可迭代

‘type’ object is not iterable

以下是一些代码片段.

models.py

from django.db import models

# Create your models here.

class Expediteur(models.Model):
    nom = models.CharField(max_length=50)
    prenom = models.CharField(max_length=100)
    adresse = models.CharField(max_length=200)
    tel = models.IntegerField()

views.py

from django.shortcuts import render,get_object_or_404
from rest_framework import viewsets
from rest_framework.views import APIView
from rest_framework.response import Response
from polls.serializers import ExpediteurSerializer,DestinataireSerializer,LettrePrioSerializer,TypeLettreRecoSerializer,LettreRecoSerializer,TimbrePrioSerializer,TimbreRecoSerializer
from polls.models import Expediteur,Destinataire,LettrePrio,TypeLettreReco,LettreReco,TimbrePrio,TimbreReco
from rest_framework import status,HTTP_HEADER_ENCODING

import json
import datetime

from django.http import HttpResponseRedirect,HttpResponse,Http404
from django.core.urlresolvers import reverse
from django.contrib.auth.decorators import user_passes_test
from django.contrib.auth import login
from django.core.exceptions import ObjectDoesNotExist
from django.views.decorators.csrf import csrf_exempt
from django.utils.timezone import get_current_timezone
from django.db.models.query import QuerySet

# Create your views here.

class ExpeViewSet(APIView):
    QuerySet = Expediteur.objects.all()
    serializer_class = ExpediteurSerializer

    def get(self,request):
        serializer = ExpediteurSerializer(QuerySet,many=True)
        return Response(serializer.data)

    def post(self,request):
        serializer = self.serializer_class(data=request.DATA)
        return Response(status=status.HTTP_201_CREATED)

serializers.py

from rest_framework import serializers
from polls.models import Expediteur,TimbreReco


class ExpediteurSerializer(serializers.ModelSerializer):
    class Meta:
        model = Expediteur

我还留下了Traceback以获取更多信息：

Environment:


Request Method: GET
Request URL: http://0.0.0.0:8000/polls/expediteur/

Django Version: 1.7.1
Python Version: 2.7.6
Installed Applications:
('django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','rest_framework','polls')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware','django.middleware.common.CommonMiddleware','django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.auth.middleware.SessionAuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:
File "/Library/Python/2.7/site-packages/Django-1.7.1-py2.7.egg/django/core/handlers/base.py" in get_response
  111.                     response = wrapped_callback(request,*callback_args,**callback_kwargs)
File "/Library/Python/2.7/site-packages/Django-1.7.1-py2.7.egg/django/views/decorators/csrf.py" in wrapped_view
  57.         return view_func(*args,**kwargs)
File "/Library/Python/2.7/site-packages/Django-1.7.1-py2.7.egg/django/views/generic/base.py" in view
  69.             return self.dispatch(request,*args,**kwargs)
File "/Library/Python/2.7/site-packages/rest_framework/views.py" in dispatch
  452.             response = self.handle_exception(exc)
File "/Library/Python/2.7/site-packages/rest_framework/views.py" in dispatch
  449.             response = handler(request,**kwargs)
File "/Users/mehdi/rendu/ProjectWeek/CUP/polls/views.py" in get
  29.         return Response(serializer.data)
File "/Library/Python/2.7/site-packages/rest_framework/serializers.py" in data
  618.         ret = super(ListSerializer,self).data
File "/Library/Python/2.7/site-packages/rest_framework/serializers.py" in data
  213.                 self._data = self.to_representation(self.instance)
File "/Library/Python/2.7/site-packages/rest_framework/serializers.py" in to_representation
  568.             self.child.to_representation(item) for item in iterable

Exception Type: TypeError at /polls/expediteur/
Exception Value: 'type' object is not iterable