我正在创建一个“添加 friend ”功能,用户可以为另一个用户用户 URL 创建一个友谊请求对象:http://localhost:8000/api/v1/users/{username}/add_friend/
但我在制作时遇到错误。
Urls.py 中的代码
from .views import (AddFriendUserAPIView)
urlpatterns = [
url(r'^(?P<username>[\w-]+)/add_friend/$', AddFriendUserAPIView.as_view({'post': 'add_friend'}), name='add_friend'),
]
Views.py 中的代码
class AddFriendUserAPIView(ReadOnlyModelViewSet):
serializer_class = FriendRequestSerializer
queryset = FriendshipRequest.objects.all()
lookup_field = 'username'
@detail_route(methods=['POST'])
def add_friend(self, request, username):
to_user = User.objects.get(username=request.data['to_user_username'])
add_qs = FriendshipRequest.objects.get_or_create(from_user=request.user, to_user=to_user , message='')
serializer = FriendRequestSerializer(add_qs)
return Response(serializer.data)
serializers.py 中的代码
class FriendRequestSerializer(ModelSerializer):
class Meta:
model = FriendshipRequest
fields = (
'id',
'from_user',
'to_user',
'message',
)
好友请求模型中的代码:
class FriendshipRequest(models.Model):
from_user = models.ForeignKey(User, related_name='friendship_requests_sent')
to_user = models.ForeignKey(User, related_name='friendship_requests_received')
message = models.TextField(blank=True)
引用引用的错误日志
Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner
41. response = get_response(request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\viewsets.py" in view
90. return self.dispatch(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
489. response = self.handle_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in handle_exception
449. self.raise_uncaught_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
486. response = handler(request, *args, **kwargs)
File "C:\Users\User\Desktop\FeedGit\backend\api\authentication\add_friend.py" in add_friend
16. to_user = User.objects.get(username=request.data['to_user_username'])
File "C:\Python27\lib\site-packages\django\utils\datastructures.py" in __getitem__
85. raise MultiValueDictKeyError(repr(key))
Exception Type: MultiValueDictKeyError at /api/v1/users/duongnuhabang/add_friend/
Exception Value: "'to_user_username'"
最佳答案
又是你,你一定对DRF有什么误解。
首先,您最好使用路由器通过 ModelViewSet
托管您的网址。例如:
项目/urls.py
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register(r'user', UserViewSet, base_name='user')
urlpatterns = [
url(r'^', include(router.urls)),
url(r'^admin/', admin.site.urls),
]
第二个是您需要的是 detail_router
而不是 list_router
:
View .py
class UserViewSet(ReadOnlyModelViewSet):
serializer_class = UserSerializer
queryset = User.objects.all()
lookup_field = username
@detail_route(methods=['POST'])
def add_friend(self, request, username):
to_user = self.get_object()
add_qs = FriendshipRequest.objects.get_or_create(from_user=request.user, to_user=to_user , message='')
serializer = FriendRequestSerializer(add_qs)
return Response(serializer.data)
将数据{}发布到www.example.com/user/【to_user_username】/add_friend/
如果你真的想在FriendShipViewSet中这样做(你可能更习惯这种风格),这里有演示:
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register(r'friendship', FriendShipViewSet, base_name='friendship')
urlpatterns = [
url(r'^', include(router.urls)),
url(r'^admin/', admin.site.urls),
]
class FriendShipViewSet(ReadOnlyModelViewSet):
serializer_class = FriendShipRequestSerializer
queryset = FriendShip.objects.all()
@list_route(methods=['POST'])
def add_friend(self, request):
to_user = User.objects.get(username=request.data['to_user_username'])
add_qs = FriendshipRequest.objects.get_or_create(from_user=request.user, to_user=to_user , message='')
serializer = self.get_serializer(add_qs)
return Response(serializer.data)
将数据{'to_user_username': 'your_custom_to_user_username'}
发布到www.example.com/friendship/add_friend/
关于python - list_route 错误 : POST methods in Viewset,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47938729/