Django Rest框架-每次创建新的模型A实例时自动创建新的模型B实例

from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver

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

class ModelB(models.Model):
    model_a = models.OneToOneField(ModelA, on_delete=models.CASCADE)
    description = models.CharField(max_length=200)

@receiver(post_save, sender=ModelA)
def create_model_b(sender, instance, created, **kwargs):
    if created:
        ModelB.objects.create(model_a=instance, description="New ModelB instance created for ModelA")

from .models import ModelA

new_model_a = ModelA.objects.create(name="ModelA Instance")