Django Rest框架中的“已查看”属性

from django.db import models
from rest_framework import serializers

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    viewed = models.BooleanField(default=False)

class MyModelSerializer(serializers.ModelSerializer):
    viewed = serializers.BooleanField(read_only=True)

    class Meta:
        model = MyModel
        fields = ('name', 'viewed')

# 在视图中使用序列化器
class MyModelView(APIView):
    def get(self, request, pk):
        instance = MyModel.objects.get(pk=pk)
        serializer = MyModelSerializer(instance)
        return Response(serializer.data)

    def put(self, request, pk):
        instance = MyModel.objects.get(pk=pk)
        serializer = MyModelSerializer(instance, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)