python - django-rest-framework 反序列化请求以创建具有用户外键的对象

Question

我想创建一个带有外键 request.user 的 SpiderService。

模型:

from django.contrib.auth.models import User

class SpiderService(models.Model):
    user = models.ForeignKey(User)
    name = models.CharField(max_length=20)

序列化器:

class SpiderServiceSerializer(serializers.ModelSerializer):
    user = serializers.ReadOnlyField(source='user.id')

    class Meta:
        model = SpiderService
        fields = ('id', 'user', 'name') 

class SpiderServiceListSerializer(viewsets.ModelViewSet):
    queryset = SpiderService.objects.all()
    serializer_class = SpiderService

观看次数:

class SpiderServiceList(APIView):

    def get(self, request, format=None):
        services = SpiderService.objects.all()
        serializer = SpiderServiceSerializer(services, many=True)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = SpiderServiceSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

    def perform_create(elf, serializer):
        serializer.save(user=self.request.user)

当我发帖时

{
    "name": "2"
}

到 api url，出现 500 错误:

[01/Feb/2016 15:39:55] "POST /services/ HTTP/1.1" 500 17105
IntegrityError: NOT NULL constraint failed: spmanage_spiderservice.user_id

我已阅读 Serializer relations发现我不应该像上面那样写代码。官方的例子相当于去掉了SpiderServiceSerializer中的user field，在UserSerializer中增加了一个spiderservice field。貌似目标是在 django 模型中实现类似 user.spiderservice_set 的语法，这不符合我的目的。

我只想用 request.user 创建一个 spiderservice 对象。

如何解决？

Answer 1

您需要将当前用户添加为 extra parameter to the Serializer's save method :

serializer.save(user=request.user)