如何在django rest框架中对嵌套的序列化程序数据执行更新操作？

# serializers.py
from rest_framework import serializers

class ChildSerializer(serializers.ModelSerializer):
    class Meta:
        model = Child
        fields = '__all__'

class ParentSerializer(serializers.ModelSerializer):
    children = ChildSerializer(many=True)

    class Meta:
        model = Parent
        fields = '__all__'

# views.py
from rest_framework.generics import UpdateAPIView
from .serializers import ParentSerializer

class ParentUpdateView(UpdateAPIView):
    serializer_class = ParentSerializer
    queryset = Parent.objects.all()

    def update(self, request, *args, **kwargs):
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=True)
        serializer.is_valid(raise_exception=True)
        self.perform_update(serializer)
        return Response(serializer.data)

    def perform_update(self, serializer):
        serializer.save()

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

urlpatterns = [
    path('parents/<int:pk>/', ParentUpdateView.as_view(), name='parent-update'),
]