Django：确定使用post_delete信号时哪个用户正在删除 [英] Django: determine which user is deleting when using post_delete signal

问题描述

我希望管理员在删除某些对象时收到通知，但我也想确定哪个用户正在执行删除。

可以吗？

这是代码：

 ＃models.py 
＃信号从django.db.models.signals导入post_delete 
时，通知管理员
从设置导入DEBUG 
 
 def notify_on_delete（sender，instance，using，** kwargs） ：
'''当节点被删除时通知管理员。 
如果DEBUG：
 #return False 
 pass 
＃准备上下文
上下文= {
'node'：instance， 
'site'：SITE 
} 
＃通知管理员想要收到通知
 notify_admins（实例，'email_notifications / node-deleted-admin_subject.txt'，'email_notifications / node -deleted-admin_body.txt'，context，skip = False）
 
 post_delete.connect（notify_on_delete，sender = Node）
  

解决方案

我怀疑可能使用内置信号（没有用户隐含绑定到删除操作，并且由于Django的松散耦合数据库层不处理 HttpRequest 对象）。我会创建一个自己的信号，它提供了一个用户参数，并将其发送到删除操作发生的任何视图中，如：

$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

＃myapp.sourceals
导入my_post_delete
...
my_post_delete.connect（notify_on_delete，sender = Node）

＃myapp / views.py
from myapp.signals import my_post_delete
...
@login_required
def my_delete_view（request，...）
..
instance = Node.objects.get（...）
instance.delete（）
my_post_delete.send（sender = Node，instance = instance，user = request.user）

I want admins to be notified when certain objects are deleted but I also want to determine which user is performing the delete.

Is it possible?

This is the code:

# models.py
# signal to notify admins when nodes are deleted
from django.db.models.signals import post_delete
from settings import DEBUG

def notify_on_delete(sender, instance, using, **kwargs):
    ''' Notify admins when nodes are deleted. Only for production use '''
    if DEBUG:
        #return False
        pass
    # prepare context
    context = {
        'node': instance,
        'site': SITE
    }
    # notify admins that want to receive notifications
    notify_admins(instance, 'email_notifications/node-deleted-admin_subject.txt', 'email_notifications/node-deleted-admin_body.txt', context, skip=False)

post_delete.connect(notify_on_delete, sender=Node)

解决方案

I doubt it's possible using the built-in signals (there is no User implicitly tied to a delete operation, and because of Django's loose coupling the database layer doesn't deal with HttpRequest objects). I would create my own signal which provides a user argument and send it in whatever view the delete operation takes place, something like:

# myapp/signals.py
from django.dispatch import Signal
my_post_delete = Signal(providing_args=['instance', 'user'])

# myapp/models.py
from myapp.signals import my_post_delete
...
my_post_delete.connect(notify_on_delete, sender=Node)

# myapp/views.py
from myapp.signals import my_post_delete
...
@login_required
def my_delete_view(request, ...)
    ...
    instance = Node.objects.get(...)
    instance.delete()
    my_post_delete.send(sender=Node, instance=instance, user=request.user)

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