Django API在JSON响应中嵌套多对多字段

from django.db import models

class User(models.Model):
    name = models.CharField(max_length=100)
    groups = models.ManyToManyField('Group')

class Group(models.Model):
    name = models.CharField(max_length=100)

from rest_framework import serializers

class GroupSerializer(serializers.ModelSerializer):
    class Meta:
        model = Group
        fields = ('name',)

class UserSerializer(serializers.ModelSerializer):
    groups = GroupSerializer(many=True)

    class Meta:
        model = User
        fields = ('name', 'groups')

from rest_framework.response import Response
from rest_framework.views import APIView

class UserView(APIView):
    def get(self, request):
        users = User.objects.all()
        serializer = UserSerializer(users, many=True)
        return Response(serializer.data)