python - 另一个无法解析超链接关系错误的 URL

Question

是的，我知道类似的问题已经被问过很多次，但很抱歉没有一个答案真正帮助到我，或者我错过了一些重要的事情。

我想在客户端发布的数据格式为以下格式时进行注册:

{
    "email": "asouausdhnsabnsmsd.s@s.com",
    "first_name": "s",
    "last_name": "d",
    "password": "f"
}

和服务器返回:

{
    "results": {
        "email": "asouausdhnsabnsmsd.s@s.com",
        "first_name": "s",
        "last_name": "d"
    }
}

当我发布数据时，我得到:

ImproperlyConfigured at /api/register Could not resolve URL for hyperlinked relationship using view name "customuser-detail". You may have failed to include the related model in your API, or incorrectly configured the lookup_field attribute on this field.

所以我有 serializers.py 这样的:

class RegisterUserSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = CustomUser
        fields = ('url', 'email', 'first_name', 'last_name', 'password')
        write_only_fields = ('password',)

    def create(self, validated_data):
        user = CustomUser.objects.create(**validated_data)
        try:
            user.set_password(user.password)
            user.save()
            return user
        except KeyError:
            return user


class RegisterUserRetrieveSerializer(serializers.Serializer):
    results = RegisterUserSerializer(source='*')

然后 views.py 中的 api View 集:

class RegisterUserViewSet(mixins.CreateModelMixin,
                          viewsets.GenericViewSet):
    permission_classes = (AllowAny,)
    parser_classes = (parsers.JSONParser,)
    serializer_class = serializers.RegisterUserSerializer
    model = CustomUser

    def create(self, request):
        serializer = serializers.RegisterUserSerializer(data=request.data)
        if serializer.is_valid(raise_exception=True):
            user = serializer.save()
            serializer = serializers.RegisterUserRetrieveSerializer(user, context={'request': request})
            results = serializer.data
            return Response(results, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

和 urls.py:

router = routers.DefaultRouter()
router_without_trailing_slashes = routers.DefaultRouter(trailing_slash=False)
router.register(r'register', RegisterUserViewSet, base_name='customuser')
router_without_trailing_slashes.register(r'register', RegisterUserViewSet, base_name='customuser')

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^templates/', include('core.main.urls'), name='templates'),

    url(r'^api/', include(router_without_trailing_slashes.urls)),
    url(r'^api/', include(router.urls)),
]

新用户已正确保存到数据库中，因此我认为该错误与 RegisterUserRetrieveSerializer 有某种关联。有什么想法吗？

Answer 1

看起来问题在于您在序列化程序中包含了 url 字段，但 DRF 无法生成该 url，因为没有序列化程序的详细 View 。

有两种选择:

1. 从序列化程序中删除 url 字段
2. 将 mixins.RetrieveModelMixin 添加到 ViewSet，以便序列化程序可以为实例生成详细 url