如何在Django-Rest-Framework序列化程序中获取Request.User？

我已经尝试过类似的方法，但是它不起作用。

class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model = Post

    def save(self):
        user = self.context['request.user']
        title = self.validated_data['title']
        article = self.validated_data['article']

我需要一种能够从我的序列化器类访问request.user的方法。

您不能request.user直接访问。您需要访问请求对象，然后获取用户属性。

像这样：

user =  self.context['request'].user

为了更安全，

user = None
request = self.context.get("request")
if request and hasattr(request, "user"):
    user = request.user

可以在这里阅读更多有关额外上下文的信息

实际上，您不必理会上下文。有一种更好的方法：

from rest_framework.fields import CurrentUserDefault

class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model = Post

   def save(self):
        user = CurrentUserDefault()  # <= magic!
        title = self.validated_data['title']
        article = self.validated_data['article']

正如伊戈尔在其他答案中提到的那样，使用可以使用CurrentUserDefault。如果您不想为此仅覆盖保存方法，请使用doc：

from rest_framework import serializers

class PostSerializer(serializers.ModelSerializer):
    user = serializers.PrimaryKeyRelatedField(read_only=True, default=serializers.CurrentUserDefault())
    class Meta:
        model = Post

您可以在视图内request.user调用时通过.save(...)：

class EventSerializer(serializers.ModelSerializer):

    class Meta:
        model = models.Event
        exclude = ['user']


class EventView(APIView):

    def post(self, request):
        es = EventSerializer(data=request.data)
        if es.is_valid():
            es.save(user=self.request.user)
            return Response(status=status.HTTP_201_CREATED)
        return Response(data=es.errors, status=status.HTTP_400_BAD_REQUEST)

这是模型：

class Event(models.Model):
    user = models.ForeignKey(to=settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    date = models.DateTimeField(default=timezone.now)
    place = models.CharField(max_length=255)

您需要在序列化程序中进行一些小的编辑：

class PostSerializer(serializers.ModelSerializer):

    class Meta:
        model = Post

    def save(self):
        user = self.context['request'].user
        title = self.validated_data['title']
        article = self.validated_data['article']

这是一个使用模型混合视图集的示例。在create方法中，您可以找到调用串行器的正确方法。get_serializer方法正确填充上下文字典。如果需要使用视图集上定义的其他序列化器，请参阅update有关如何使用上下文字典启动序列化器的方法，该方法还将请求对象传递给序列化器。

class SignupViewSet(mixins.UpdateModelMixin, mixins.CreateModelMixin, viewsets.GenericViewSet):

    http_method_names = ["put", "post"]
    serializer_class = PostSerializer

    def create(self, request, *args, **kwargs):
        serializer = self.get_serializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        self.perform_create(serializer)
        headers = self.get_success_headers(serializer.data)
        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)

    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        kwargs['context'] = self.get_serializer_context()
        serializer = PostSerializer(instance, data=request.data, partial=partial, **kwargs)
        serializer.is_valid(raise_exception=True)
        self.perform_update(serializer)    
        return Response(serializer.data)