在 Django 中删除用户几天后删除用户的文件答案

【问题标题】：Delete a user's file after some days after the user is deleted in Django在 Django 中删除用户几天后删除用户的文件
【发布时间】：2020-07-25 16:17:53
【问题描述】：

在我的 Django 应用程序中，我想在用户删除其帐户 4-5 天后删除用户的媒体文件（他们的个人资料图片和其他图像）。


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)

我用post_delete删除了用户的文件，但是在4-5天或某个时间段后如何删除文件。

【问题讨论】：

标签： python django django-models django-admin django-signals

【解决方案1】：

将 django-celery-beat 用于定期任务会很好： 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。您需要的是一个过期字段，cronjob 在删除它之前会对其进行检查。

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，您也可以将这个想法融入任何您想解决这个问题的方式中。

【讨论】：