I have the exact problem. I round end and start dates to 15 minutes. I mean,
user enters 12:10, I write 12:15. So each 15 minutes cron runs a script with
django-commands-extensions runscript. Is a balance between accuracy and
load.
The perfect should be finding the next success to happen (easy) and program
django-cron or anything else to run at that time (I don't know how)
I am very interested in the solutions people have found for this
On Mon, Oct 27, 2008 at 12:45 PM, redmonkey
<[EMAIL PROTECTED]>wrote:
>
> Hi,
>
> I'm working on a simple auctioneer's website. My Catalogue app
> consists of a list of Lots arranged into Catalogues. Each catalogue
> has an auction_data field which stores a status and a date and time of
> the sale:
>
> class Catalogue(models.Model):
> DRAFT_STATUS = 1
> LIVE_STATUS = 2
> CATALOGUE_CHOICES = (
> (DRAFT_STATUS, 'Draft'),
> (LIVE_STATUS, 'Live'),
> )
> status = models.IntegerField("Status", choices=CATALOGUE_CHOICES,
> default=DRAFT_STATUS)
> auction_date = models.DateTimeField("Date of Auction")
> ...
>
> class Lot(models.Model):
> catalogue = models.ForeignKey(Catalogue, related_name="lots")
> ...
>
> Pretty simple stuff. My problem is that I need to run a function at
> the auction_date of the catalogue that will do a few things like
> change the status of the catalogue, and send an email out to some
> admins.
>
> I've done some brief research, and found <a href="http://
> code.google.com/p/django-cron/" title="django-cron">django-cron</a>,
> and I imagine I could write something that checked each hour to see if
> any catalogues had expried recently, but that seems mad.
>
> Another solution I came up with involved checking for the expiry date
> every time a record is pulled up from the database. But this add's a
> hit to user responsiveness (even if it is tiny) and still doesn't
> allow me to send out the email.
>
> Finally, I read up on Django's signals to decide if I could use that
> mechanism to do other things. Signals sounds ideal, but I don't know
> how to trigger at the right time.
>
> Can anyone help me with this? How do I trigger a custom signal based
> on a DateTimeField value?
>
> Thanks,
> >
>
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