Question

我想使用RetrieveModelMixin。默认设置是使用pk查找，但是我想查找具有另一个模型字段的模型实例。那我该怎么办呢？我试图添加 lookup_fields ='用户名' 但是没有成功。

#models.py
    class Profile(models.Model):
    user       = models.OneToOneField(User, on_delete=models.CASCADE, default='', blank=True, null=False)
    username = models.CharField(max_length=100, blank = False, null = True) 
    post = models.ForeignKey(Post, related_name='post', on_delete=models.CASCADE, null =True)
    introduction = models.TextField()


#serializers.py
    class ProfileSerializer(serializers.ModelSerializer):
    class Meta:
        model = Profile
        fields = '__all__'
        lookup_fields = 'username'

#urls.py
    path('test/<slug:username>/', views.ProfileDetail.as_view(),name='profiles-detail'),  


#views.py
    class ProfileDetail(mixins.RetrieveModelMixin,
                 mixins.UpdateModelMixin,
                 mixins.DestroyModelMixin,
                 generics.GenericAPIView):

    queryset = Profile.objects.all()
    serializer_class = ProfileSerializer
    lookup_fields = 'username'

    def get(self, request, *args, **kwargs):
        return self.retrieve(request, *args, **kwargs)

    def put(self, request, *args, **kwargs):
        return self.update(request, *args, **kwargs)

此结果

要使用名为“ pk”的URL关键字参数调用的预期视图ProfileDetail。修复您的URL conf，或在视图上正确设置.lookup_field属性。

如何解决此错误？谢谢。

Answer 1

attributes on the view and the serializer被称为lookup_field，而不是lookup_fields。

Django Rest Framework：使用url slug，而不是pk查找模型实例（lookup_field，retrievemodelmixin）

1 个答案: