确定模型已被删除

I would like to call a method from my Model's delete method. Is there any built-in way from within that method to know if the model is currently being deleted so that I do not call save and recreate the model? In this example, how would I write $deleting?

我想从我的Model的delete方法中调用一个方法。是否有任何内置方法从该方法中知道当前是否正在删除模型，以便我不调用save并重新创建模型？在这个例子中，我如何写$ delete？

class MyModel(models.Model):
    def cleanup_stuff(self):
        do_something(self)
            self.xxx = None
            if not $deleting:
                self.save()

    def delete(self, *args, **kwargs):
        with transaction.atomic():
            super(MyModel, self).delete(*args, **kwargs)
            self.cleanup_stuff()

2 个解决方案

#1

There's no built-in way, but you could easily set your own attribute on the model in the delete method and check for its existence:

没有内置方法，但您可以在delete方法中轻松地在模型上设置自己的属性并检查其存在：

def delete(self, *args, **kwargs):
    self.is_being_deleted = True
    ...

def cleanup_stuff(self):
    if not getattr(self, 'is_being_deleted', False):
        self.save()
    ...

#2

As far as I know, there is no built-in helper. I would use and keyword argument in cleanup_stuff method:

据我所知，没有内置助手。我会在cleanup_stuff方法中使用和关键字参数：

def cleanup_stuff(self, deleting=False):
    ...

def delete(self, *args, **kwargs):
    with transaction.atomic():
        super(MyModel, self).delete(*args, **kwargs)
        self.cleanup_stuff(deleting=True)

#1