python - DRF 3.0.1 : . create() 方法不支持可写嵌套字段

Question

我刚刚更新到 Django REST Framework 3.0.1，我的测试失败了 this addition改进对嵌套创建和更新的检查(默认情况下 .create() 方法不支持可写嵌套字段。)，但据我所知，我没有尝试进行任何嵌套写入。我有一个相关的 Serializer，但它被设置为 read_only=True 并且当我发布到此端点时，相关对象都已经存在。有什么想法，还是我只是做错了什么？

class Like(models.Model):
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField(db_index=True)
    content_object = generic.GenericForeignKey()

    user = models.ForeignKey(settings.AUTH_USER_MODEL)

    class Meta:
        unique_together = (("user", "content_type", "object_id"),)


class LikeSerializer(serializers.ModelSerializer):
    user = UserSerializer(read_only=True, default=serializers.CurrentUserDefault())

    class Meta:
        model = Like


class LikeViewSet(viewsets.ModelViewSet):
    queryset = Like.objects.all()
    serializer_class = LikeSerializer

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

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

打印的 LikeSerializer

LikeSerializer():
    id = IntegerField(label='ID', read_only=True)
    user = UserSerializer(default=CurrentUserDefault(), read_only=True):
        email = EmailField(
            allow_blank=True, 
            allow_null=True, 
            max_length=75, 
            required=False, 
            validators=[<UniqueValidator(queryset=User.objects.all())>])
        id = IntegerField(label='ID', read_only=True)
        username = CharField(
            help_text='Required. 30 characters or fewer. Letters, digits and @/./+/-/_ only.', 
            max_length=30, 
            validators=[<django.core.validators.RegexValidator object>, 
            <UniqueValidator(queryset=User.objects.all())>])
        fullname = CharField(allow_blank=True, allow_null=True, max_length=80, required=False)
        original_photo = ImageField(allow_null=True, max_length=100, required=False)
        about = CharField(allow_blank=True, allow_null=True, required=False, style={'type': 'textarea'})
        user_following_count = ReadOnlyField()
        user_followers_count = ReadOnlyField()
        content_type = SerializerMethodField()
    created = DateTimeField(read_only=True)
    object_id = IntegerField(required=True)
    content_type = PrimaryKeyRelatedField(queryset=ContentType.objects.all(), required=True)
    class Meta:
        validators = [<UniqueTogetherValidator(queryset=Like.objects.all(), fields=('user', 'content_type', 'object_id'))>]

我只是发布我想要点赞的对象的 object_id 和 content_type。在我更新之前工作正常。

Answer 1

作为一个问题跟进，这里... https://github.com/tomchristie/django-rest-framework/pull/2196#issuecomment-66839296