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

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？

请您参考如下方法:

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

serializer.save(user=request.user)