Thanks Matías, you've come up with a good solution, but unfortunately this won't really work for my situation.
For my client, online bidding ends immediately before they open bidding on the shop floor. The catalogue for that sale must go offline at that point. I can't expect my client to postpone things while they wait for my cron job to decide to close the catalogue down. Thanks for posting the save method though, it's quite neat. I'm finding it hard to believe there isn't an easy way to do this, not even with the full Python Library behind it. I understand what signals are, and I know that you can create <a href="http://code.google.com/p/ django-cron/source/browse/trunk/cron/signals.py" title"Django-cron: Signals">custom ones</a>. I'd like to know how I can send my custom signal at the DateTimeField value. On Oct 27, 12:14 pm, "Matías Costa" <[EMAIL PROTECTED]> wrote: > BTW this is the save method for the model with the rounding function: > > def save(self): > def roundminute(d, r): > """Rounds the datetime d to the nearer r multiple > If r == 15 => > 3:00 -> 3:00 > 3:05 -> 3:00 > 3:27 -> 3:30 > 3:55 -> 4:00 > > Adds hours correctly > """ > from datetime import datetime, timedelta > m = d.minute > if m > (60 - r/2): > m = 0 > d += timedelta(60*60) > else: > m = m - (m%r) if (m%r)<(r/2) else m+(r-(m%r)) > return d.replace(minute=m, second=0, microsecond=0) > > if self.price == None: > self.price = self.start_price > self.start_date = roundminute(self.start_date, 15) > self.end_date = roundminute(self.end_date, 15) > super(Auction, self).save() > > On Mon, Oct 27, 2008 at 1:06 PM, Matías Costa <[EMAIL PROTECTED]> wrote: > > 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, --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
