Question

我有2个模型，Parent an Child（fk Parent）和2个序列化器：

class ParentSerializer(serializers.HyperlinkedModelSerializer):
    children = serializers.SerializerMethodField()

    class Meta:
        model = Parent
        fields = (
            'username',
            ...
            'url',
            'children',
        )

    def get_children(self, obj):
        queryset = Child.objects.filter(parent=obj)
        children = ChildSerializer(queryset, many=True, context=self.context).data
        return children


class ChildSerializer(serializers.HyperlinkedModelSerializer):

    class Meta:
        model = Child
        fields = [
            'parent',
            ...
            'url',
        ]

我的TestCase：

class TestSerializers(TestCase):
    def test_child_serializer(self):
        parent_data = {
            'username': 'JohnSnow',
            ...
        }
        parent = Parent.objects.create_user(**user_data)
        parent.set_password('jon12345')
        child_data = {
            'parent': {
                 'username': "JohnSnow",
                 ...
            },
            # 'parent': user,
            ...
        }

        serializer = ChildSerializer(data=sample_ig_user_data)
    if not serializer.is_valid():
        print(serializer.errors)

我的错误：{'parent': ['Incorrect type. Expected URL string, received dict.']}

首先，我尝试将父级既作为字典又作为创建的对象传递。在子序列化器中有一个细微差别，父进程只是作为超链接传输（在api中的浏览器中显示）顺便说一下如何将父级的序列化器传递给子序列化器，如果我已经在父级中导入了子级，那么循环导入是因为？

第二个问题，关于错误，我明白我要么错误地将数据传输到字典，要么错误地处理它？请帮忙。普遍谢谢！

Answer 1

Incorrect type. Expected URL string, received dict. - ＆gt;你需要传递父母的主键：

child_data = {
    ...
    'parent': parent.pk,
    ...
}

Serializer Test serializer.is_valid（）= False

1 个答案: