How to delete a certain model instance in django after a given date

[YOGITHA A N]

So  here are my models:

     class Mess(models.Model):
    muser = models.OneToOneField(User)
    MESS_NAME = (('GH','girls hostel top mess'),
                    ('IH','girls hostel down mess'),
                    ('MM','Mega mess'),
                    ('FB','First Block mess'),
                    ('SB','Second Block mess'),
                    ('TB','Third Block mess'),
                    )
    mess_name = models.CharField(max_length=25, choices = MESS_NAME,primary_key=True)
    per_day_cost = models.IntegerField()
    def __str__(self):
        return self.mess_name

class MessMenu(models.Model):
    mess_name = models.ForeignKey(Mess)
    day = models.DateField()
    morning = models.TextField()
    afternoon = models.TextField()
    snacks = models.TextField()
    dinner = models.TextField()
    def __str__(self):
        return self.mess_name

Once i create an object in MessMenu I want django to delete that object after 7 days. Please let me know how to delete a certain object after a given period of time.

[Vijay Khemlani]

You could write a management command

https://docs.djangoproject.com/en/1.10/howto/custom-management-commands/

and execute it regularly (for example using a cron job)

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[王安刚]

i think maybe you need a schedule job to delete the model.

you can mark the model with a ctime, and check whether any model with ctime 7 days from now and then delete it.

在 2016年11月6日星期日 UTC+8上午2:31:20，YOGITHA A N写道：

[YOGITHA A N]

menudeleted = MessMenu.objects.filter( day__lt = timezone.now())
    for m in menudeleted:
        m.delete()
menu = MessMenu.objects.all()

use basic comparison filter to filter the dates