如何在DjangoRestFramework中更新关系字段

# models.py
from django.db import models

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

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

# serializers.py
from rest_framework import serializers
from .models import User, Group

class GroupSerializer(serializers.ModelSerializer):
    users = serializers.PrimaryKeyRelatedField(many=True, queryset=User.objects.all())

    class Meta:
        model = Group
        fields = ['id', 'name', 'users']

# views.py
from rest_framework import generics
from .models import Group
from .serializers import GroupSerializer

class GroupUpdateView(generics.UpdateAPIView):
    queryset = Group.objects.all()
    serializer_class = GroupSerializer

# urls.py
from django.urls import path
from .views import GroupUpdateView

urlpatterns = [
    path('groups/<int:pk>/', GroupUpdateView.as_view(), name='group-update'),
]