删除Django中的用户后几天后删除用户的文件

Question

在我的Django应用程序中，我希望在用户删除帐户的4-5天后删除用户的媒体文件(他们的配置文件、图片和其他图像)。

def delete_files(sender, instance, **kwargs):
    path = str(os.getcwd())
    try:
        pathdl = f"{path}\\data\\media\\{instance.username}"
        shutil.rmtree(pathdl)
    except Exception:
        print(Exception)


post_delete.connect(delete_files, sender=User)

我使用post_delete删除用户的文件，但是如何在4-5天或一定的时间内删除该文件。

Answer 1

使用django-芹菜节拍来执行定期任务是很好的：http://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html#beat-custom-schedulers。

以此为例

将此视为您的用户models.py。这里您需要的是一个到期字段，在删除它之前，将由cronjob检查它。

models.py

   class Foo(models.model):
       UserId= models.CharField(max_length=40, unique=True) #user pk here
       expiration_date = models.DateTimeField() # you would set the time here

views.py

import datetime
from django.utils import timezone

def add_foo(instance):
    # Create an instance of foo with expiration date now + one day
    objects.create(expiration_date=timezone.now() + datetime.timedelta(days=1))
        path = str(os.getcwd())
    try:
        pathdl = f"{path}\\data\\media\\{instance.username}"
        shutil.rmtree(pathdl)
        User.objects.create(expiration_date=timezone.now() + datetime.timedelta(days=1))
    except Exception:
        print(Exception)
post_delete.connect(delete_files, sender=User)

tasks.py

from celery.schedules import crontab
from celery.task import periodic_task
from django.utils import timezone

@periodic_task(run_every=crontab(minute='*/5'))
def delete_old_foos():
    # Query all the expired date in our database
    userMedia = Users.objects.all()
    #Or get a specific user id to delete their file
    # Iterate through them
    for file in userMedia :
    
        # If the expiration date is bigger than now delete it
        if file.expiration_date < timezone.now():
            file.delete()
            # log deletion
    return "completed deleting file at {}".format(timezone.now())

当然，你也可以把这个想法融入到你想要解决这个问题的任何方式中。