我们如何才能立即将嵌套的json对象反序列化为python模型对象？

Question

When we serialize python model object to nested json data we can serialize it in django as foe example.

DataSerializer(data_list, many=True)

and output will like that.

[
    {"name":"user_1", "id":1}, 
    {"name":"user_2", "id":2}, 
    {"name":"user_3", "id":3},
    ... ...
]

Now I want to deserialize the list of json object to python model object at once.

As for example:

# the serializer class
class UserSerilizer(serializers.Serializer):
    id = serializers.IntegerField(required=True)
    name = serializers.CharField(required=True)


# Request model class.
class UserRequestModel:
    id = None
    name = None

    def __init__(self, dictionary):
        self.__dict__.update(dictionary)

And what I do.

# serialize the request data for param validation
user_serializer = UserSerilizer(data=request.data)

# update the user request model with validate data
user_data = UserRequestModel(user_serializer.validated_data)

That's why I can access the value user_data.id and user_data.name for the request body {"name":"user_1", "id":1}

But how can I do it for list of data at once like we serialize at once with passing parameter DataSerializer(data_list, many=True) .

Answer 1

Just append deserialize method in your Serializer class

class UserSerializer(serializers.Serializer):
    id = serializers.IntegerField(required=True)
    name = serializers.CharField(required=True)

    @classmethod
    def deserialize(cls, data, many=False):
        if many is False:
            return UserRequestModel(data)
        else:
            obj_list = []
            for d in data:
                obj_list.append(UserRequestModel(d))
            return obj_list

But I can not understand why you want to deserialize. I don't think this is recommended in django.