如何在DRf中使用嵌套的序列化程序和视图集同时更新和创建？

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__'

    def create(self, validated_data):
        children_data = validated_data.pop('children')
        parent = Parent.objects.create(**validated_data)
        for child_data in children_data:
            Child.objects.create(parent=parent, **child_data)
        return parent

    def update(self, instance, validated_data):
        children_data = validated_data.pop('children')
        children = (instance.children).all()
        children = list(children)
        instance = super(ParentSerializer, self).update(instance, validated_data)

        for child_data in children_data:
            child = children.pop(0)
            child.name = child_data.get('name', child.name)
            child.age = child_data.get('age', child.age)
            child.save()

        return instance

from rest_framework import viewsets

class ParentViewSet(viewsets.ModelViewSet):
    queryset = Parent.objects.all()
    serializer_class = ParentSerializer

from django.urls import include, path
from rest_framework.routers import DefaultRouter

router = DefaultRouter()
router.register(r'parents', ParentViewSet)

urlpatterns = [
    path('', include(router.urls)),
]

POST /parents/
{
    "name": "Parent 1",
    "children": [
        {
            "name": "Child 1",
            "age": 10
        },
        {
            "name": "Child 2",
            "age": 12
        }
    ]
}

PUT /parents/<parent_id>/
{
    "name": "Updated Parent",
    "children": [
        {
            "id": <child_id>,
            "name": "Updated Child",
            "age": 15
        }
    ]
}