如何将kwargs从save传递到post_save信号

Question

我正在连接一个自定义的post_save信号,并注意到我似乎无法找到一个简单的方法来传递一组kwargs.

在保存期间(在自定义表单内)

def save(self, commit=True):
    user = super(CustomFormThing, self).save(commit=False)
    #set some other attrs on user here ...
    if commit:
        user.save()

    return user

然后在我的自定义post_save钩子里面我有以下(但从来没有得到任何kwargs)

@receiver(post_save, sender=User)
def create_profile(sender, instance, created, **kwargs):
    some_id = kwargs.get('some', None)
    other_id = kwargs.get('other', None)

    if created:
        #do something with the kwargs above...

我如何将kwargs从save保存到post_save事件？

Answer 1

内置信号由Django发送,因此您无法控制他们的kwargs.

您可以:

1. 定义并发送您自己的信号.

2. 在模型实例中存储其他信息.像这样

   def save(self, commit=True):
       user = super(CustomFormThing, self).save(commit=False)
       #set some other attrs on user here ...
       user._some = 'some'
       user._other = 'other'
       if commit:
           user.save()
   
       return user
   
   @receiver(post_save, sender=User)
   def create_profile(sender, instance, created, **kwargs):
       some_id = getattr(instance, '_some', None)
       other_id = getattr(instance, '_other', None)
   
       if created:
           #do something with the kwargs above...