在 Django rest 框架中反序列化后获取 class 个实例

Question

我正在尝试从给定的序列化中创建 Userr 对象。在 Django REST Framework 文档中，他们提到了必须 return 实例的 save() 函数，但事实并非如此。

class Userr(object):
    def __init__(self, email, name):
        self.email = email
        self.name = name

class UserrSerializer(serializers.Serializer):
    email = serializers.EmailField()
    name = serializers.CharField()
    def create(self, validated_data):
        return Userr(**validated_data)

u_serializer = UserrSerializer(data={'email': bla.bla@ex.org', 'name': bla'})
print (u_serializer.is_valid())
user = u_serializer.save()

我希望 user 变量用 class Userr 的对象初始化。相反，我看到以下错误：

Traceback (most recent call last):
  File "/Users/katkov/PycharmProjects/hbp-knowledge-graph/platform_venv/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/Users/katkov/PycharmProjects/hbp-knowledge-graph/hbp_knowledge_graph/ontology/tests/test_dataset_json_deserializer.py", line 73, in testSerializers
    u_serializer.save()
  File "/Users/katkov/PycharmProjects/hbp-knowledge-graph/platform_venv/lib/python2.7/site-packages/rest_framework/serializers.py", line 598, in save
    self.save_object(self.object, **kwargs)
  File "/Users/katkov/PycharmProjects/hbp-knowledge-graph/platform_venv/lib/python2.7/site-packages/rest_framework/serializers.py", line 580, in save_object
    obj.save(**kwargs)
AttributeError: 'dict' object has no attribute 'save'

我做错了什么？

Answer 1

感谢 mariodev，我得到了它。我使用 rest_framework 2.3 版并尝试在其上编写运行 3.0 代码。对于 3.0，class 应该是这样的：

class UserrSerializer(serializers.Serializer):
    email = serializers.EmailField()
    name = serializers.CharField()
    def restore_object(self, attrs, instance=None):
        if instance:
            # Update existing instance
            instance.email = attrs.get('email', instance.email)
            instance.email = attrs.get('name', instance.name)
            return instance
        return Userr(**attrs)

在 Django rest 框架中反序列化后获取 class 个实例

Getting the class instances after deserialization in Django rest framework

python

django

rest

django-rest-framework