用Django信号连接外键模型

from django.db.models.signals import post_save, post_delete
from django.dispatch import receiver
from myapp.models import ForeignKeyModel

@receiver(post_save, sender=ForeignKeyModel)
def handle_foreignkey_model_save(sender, instance, created, **kwargs):
    # 在外键模型保存后执行的操作
    pass

@receiver(post_delete, sender=ForeignKeyModel)
def handle_foreignkey_model_delete(sender, instance, **kwargs):
    # 在外键模型删除后执行的操作
    pass

post_save.connect(handle_foreignkey_model_save, sender=ForeignKeyModel)
post_delete.connect(handle_foreignkey_model_delete, sender=ForeignKeyModel)