防止Django信号互相干扰的方式

如果书写了多个信号，可能会出现互相干扰的情况。为了防止这种情况的发生，我们可以手动控制信号的断开与连接。

# 导入依赖
from django.db.models.signals import post_save
from django.dispatch import receiver

def disconnect_signals():
    post_save.disconnect(信号1, sender=模型表1)
    post_save.disconnect(信号2, sender=模型表2)
   
# 设置weak=False解除弱引用，防止被垃圾回收机制清理
def connect_signals():
    post_save.connect(信号1, sender=模型表1, weak=False)
    post_save.connect(信号2, sender=模型表2, weak=False)

# 在信号中使用
@receiver(post_save, sender=模型表1)
def 信号1(sender, instance, created, **kwargs):
    disconnect_signals()  # 关闭所有信号
    pass # 书写逻辑
    connect_signals()  # 重新连接信号
    
@receiver(post_save, sender=模型表2)
def 信号2(sender, instance, created, **kwargs):
    disconnect_signals()  # 关闭所有信号
    pass # 书写逻辑
    connect_signals()  # 重新连接信号