django 信号是否在发送者模型的事务中执行

Question

我有一个名为 branch 的模型，在保存我正在使用的分支时：

with transaction.atomic():
    #previous processing 
    obj.save()
    #additional codes

我创建 post_save 信号如下：

@receiver(signals.post_save, sender=Branch)
def update_reporter_header(sender, instance,created, **kwargs):
    """ When Add or Edit a Branch The related data to branch must be change

    Args:
        sender ([Branch]): [the model Who kept under eye when any change]
        instance ([Branch]): [description]
        created ([boolean]): [return true if instance created else False]
    """
    if created:

她是否需要交易

        for obj in HeaderFooter.bobjects.all().filter(branch_id=instance.id,customize=False,is_appeare=True):
            obj.data = getattr(instance,obj.name)
            obj.save()
    

Answer 1

我在执行后发现在任何信号装饰器中都不需要事务，当且仅当在保存或删除时使用事务。