如何24小時後刪除的對象，因爲創作的同一

Question

我想，因爲該實例已創建該怎麼做芹菜

我怎麼能啓動「定時器」後的24小時後刪除實例創建一個實例？

我想要類似Snapchat的東西

Answer 1

取決於規模和您的需求。

你將不得不使用Django芹菜拍爲週期任務： http://docs.celeryproject.org/en/latest/userguide/periodic-tasks.html#beat-custom-schedulers

我就老老實實創建將運行每次3-5分鐘，芹菜任務。

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())