如何24小时后删除的对象，因为创作的同一

Question

我想，因为该实例已创建该怎么做芹菜

我怎么能启动“定时器”后的24小时后删除实例创建一个实例？

我想要类似Snapchat的东西

Answer 1

取决于规模和您的需求。

你将不得不使用Django芹菜拍为周期任务： http://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html#beat-custom-schedulers

我就老老实实创建将运行每次3-5分钟，芹菜任务。

models.py

class Foo(models.model): 
     created_at = models.DateTimeField(auto_add_now=True) 
     expiration_date = models.DateTimeField() 

views.py

import datetime 
from django.utils import timezone 

def add_foo(): 
    # Create an instance of foo with expiration date now + one day 
    Foo.objects.create(expiration_date=timezone.now() + datetime.timedelta(days=1)) 

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 foos in our database 
    foos = Foo.objects.all() 

    # Iterate through them 
    for foo in foos: 

     # If the expiration date is bigger than now delete it 
     if foo.expiration_date < timezone.now(): 
      foo.delete() 
      # log deletion 
    return "completed deleting foos at {}".format(timezone.now())