在Django序列化程序中显示ManyToMany关系上的额外字段

from rest_framework import serializers
from .models import Model1, Model2

class Model1Serializer(serializers.ModelSerializer):
    extra_field = serializers.SerializerMethodField()

    class Meta:
        model = Model1
        fields = ('id', 'name', 'extra_field')

    def get_extra_field(self, obj):
        # 在这里编写获取额外字段的逻辑
        # 可以通过obj访问到ManyToMany关系的对象
        # 返回额外字段的值
        return obj.extra_field

from rest_framework import viewsets
from .serializers import Model1Serializer

class Model1ViewSet(viewsets.ModelViewSet):
    queryset = Model1.objects.all()
    serializer_class = Model1Serializer