django信号无限递归循环解决

ddn

5 年前

最近在实现 django 信号量实现保存用户时发生了错误

报错如下:

maximum recursion depth exceeded while calling a Python object

代码如下所示

user/signals.py

@receiver(post_save,sender=User)

def create_user(sender,instance=None,created=False,**kwargs):

    if create_user:

        password = instance.password

        instance.set_password(password)

        instance.save()

user/apps.py

class UsersConfig(AppConfig):

    name = 'users'

    verbose_name = "xx 信息管理"

    def ready(self):

        import  users.signals

出现这个错误的原因是因为 instance.save()触发了信号，然后再次保存，然后一直无限循环下去 …..

解决办法:

@receiver(post_save,sender=User)

def create_user(sender,instance=None,created=False,**kwargs):

    if create_user:

        # 解决无限递归循环

        post_save.disconnect(create_user, sender=sender)

        password = instance.password

        instance.set_password(password)

        instance.save()

        post_save.connect(create_user, sender=sender)

使用 post_save.disconnect 断开连接, 然后在 save() 保存后重新连接信号