Maybe with celery and Django celery you can do what you want. There is a
functionality called crontab that is manage by models with Django celery.
So you can create cron task that will call when you need with a reference
to you model.
As an interesting problem, think in the moment of update you model if you
use a cron task, specially when you change de date.
El lunes, 8 de febrero de 2016, Rod Delaporte <rod.delapo...@gmail.com>
escribió:
> I have a field of a model that changes states but I need to automatically
modify that value after an expiration datetime has come. Is there a way to
do this?
> Here is an example:
> class Post(models.Model):
> created_at = models.DateTimeField(auto_now_add=True)
> languages = (
> ('1', 'active'),
> ('2', 'inactive'),
> )
> language = models.CharField(max_length=20, choices=languages,
default='english')
> duration = models.DurationField(blank=True, null=True)
> expires = models.DateTimeField(blank=True, null=True)
> updated_at = models.DateTimeField(auto_now=True)
> @property
> def active(self):
> return self.expires > localtime(now())
> def save(self, *args, **kwargs):
> self.created_at = localtime(now())
> self.expires = self.created_at + self.duration
> return super(Post, self).save(*args, **kwargs)
>
> The problem I have is that I have to call the active function property to
check if it's True or False and I'm looking for a way that this can be done
automatically so the database updates itself.
> I've been thinking about Django-cron but I can't chose when to call the
active function, this should be done for itself.
> Is this possible?
>
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