使用 POST 时 Django 中的 MultiValueDictKeyError

Question

我是 Django Rest 框架的新手，被要求编写我们项目的令牌身份验证部分。需要注意的一件事是，因为我将来不会使用默认的管理站点，所以我编写了登录、注销、注册功能，并通过 POSTMAN 测试了功能。我现在想做的是让新用户注册、登录和注销。当用户登录时，我向他/她颁发一个令牌。一切都以最简单的方式进行。

但我还是搞不出来。我搜索了所有相关问题，但仍然无法解决我的问题。如果有人知道该怎么做，请帮助我！以下是详细内容。

当我使用 GET 时，一切正常。但是当我使用 POST 时，我收到 MultiValueDictKeyError。我不知道为什么。

查看.py

    from rest_framework.response import Response
    from django.contrib.auth import authenticate
    from rest_framework.authtoken.models import Token
    from rest_framework import status
    from django.contrib.auth.models import User
    from rest_framework.authentication import TokenAuthentication
    from rest_framework.permissions import IsAuthenticated
    from django.contrib.auth.signals import user_logged_in, user_logged_out
    from rest_framework.decorators import api_view, authentication_classes, permission_classes
    from django.views.decorators.csrf import csrf_exempt, requires_csrf_token
    @csrf_exempt
    @requires_csrf_token
    @api_view(['POST'])
    def create_user_view(request):
        if request.method == 'POST':
            username = request.POST['username']
            email = request.POST['email']
            password = request.POST['password']
            user = User.objects.create_user(username=username, email=email,     password=password)
            user.save()
            return Response({'detail': "Create user"})


    @csrf_exempt
    def login_view(request):
         if request.method == 'POST':
            username = request.POST['username']
            password = request.POST['password']
            user = authenticate(username=username, password=password)
         if user is not None:
            user_logged_in.send(sender=user.__class__, request=request, user=user)
            token = Token.objects.get_or_create(user=user)
            return Response({
                           'detail': 'POST answer', 'token': token[0].key,
                           })
        else:
            return Response({'detail': "The username or password were incorrect.",
           status: status.HTTP_404_NOT_FOUND})

    @csrf_exempt
    def logout_view(request):
        if request.method == 'POST':
            user = getattr(request, 'user', None)
            if hasattr(user, 'is_authenticated') and not user.is_authenticated():
                user = None
                user_logged_out.send(sender=user.__class__, request=request, user=user)
            if hasattr(request, 'user'):
                 from django.contrib.auth.models import AnonymousUser

                 request.user = AnonymousUser()
           return Response({'detail': "You have logged out successfully."})

Test_app/Urls.py

    from django.conf.urls import patterns, url
    from rest_framework.urlpatterns import format_suffix_patterns
    from test_app import views
    urlpatterns = patterns('test_app.views',
                           url(r'^signup', views.create_user_view),
                           url(r'^login', views.login_view),
                           url(r'^logout', views.logout_view),
                           url(r'^auth', views.AuthView),
                           )
    urlpatterns = format_suffix_patterns(urlpatterns)

Models.py（是的，我只在文件中放入两行）

    from django.contrib.auth.models import User
    from django.db import models

我还按照教程所述修改了settings.py。

现在的问题是：

Request Method: POST
Request URL:    http://127.0.0.1:8000/signup?username=haha&email=haha@gmail.com&password=okok
Django Version: 1.8.2
Exception Type: MultiValueDictKeyError
Exception Value:    
"'username'"
Exception Location: /Users/wyq/PycharmProjects/env/lib/python2.7/site-packages/django/utils/datastructures.py in __getitem__, line 322

有人可以帮忙吗？非常感谢！

Answer 1

MultiValueDictKeyErrorQueryDict当您尝试访问的键不存在于 QueryDict 中时，就会发生这种情况。您的请求方法显示为 POST，但 url 方案表明您传递的参数将进入字典request.GET。

您需要通过表单或其他方式提交参数，以便可以在request.POSTQueryDict中访问它们