Django Rest Framework模型序列化程序自定义字段

Question

I'm using Django Rest Framework and AngularJS. I have Task and Client models. The Client model is a Foreign Key for Task .

mInside serializers.py , the ClientSerializer() looks like:

class ClientBasicSerializer(serializers.ModelSerializer):

    class Meta:
        model = Client
        fields = ('id', 'name', 'gender')

And the TaskSerializer() (not working) looks like this:

class TaskSerializer(serializers.ModelSerializer):
    client = serializers.PrimaryKeyRelatedField(read_only=True)
    client_data = serializers.ClientSerializer()

    class Meta:
        model = Task

As can be seen:

• client retrieves only the PK. I'm using it to save the Task model with AngularJS resource.
• client_data contains the nested client object. I need it to display the client information for the user.

However, it does not work because there is no client_data field defined inside the Django Client Model (and I think I shouldn't define it).

How can I define it as a custom field inside the TaskSerializer() and still take advantage of the ClientSerializer() ?

Answer 1

You can use just client = serializers.ClientSerializer()

Then, you need to rewrite your create method in order to assign client instance to the created task instance.

class TaskSerializer(serializers.ModelSerializer):
    client = serializers.ClientSerializer()

    class Meta:
        model = Task

    def create(self, validated_data):

        client_id = validated_data['client'] # this should be client id
        client = Client.objects.get(id=client_id)
        del(validated_data['client'])
        task = Task.objects.create(**validated_data)
        task.client = client
        task.save()
        return save.