Thanks Erik. I forgot to say that the Group model has an "active" flag on it, so I'm seeing if I can use this.
On Thursday, 1 September 2016 14:55:05 UTC-4, Erik Cederstrand wrote: > > > > Den 1. sep. 2016 kl. 20.14 skrev Stodge <[email protected] <javascript:>>: > > > > > I have two models, Volume and Group. The Volume model has a foreign key > to Group. > > > > When a user deletes a Volume the post_delete signal handler sends an > HTTP DELETE request (/volume) to another server process. This works great. > However, when the user deletes a Group, the cascading delete also deletes > all volumes in that group. That means I get lots (I'm talking <100) of > post_delete signals for the Volume model and therefore lots of HTTP > requests. > > > > Is there anyway to avoid this? Ideally, I'd like to send the HTTP DELETE > request (/volume) when a volume is deleted, but send a different HTTP > DELETE request (/group) when the group is deleted and avoid sending any > volume HTTP DELETE requests. > > You could disconnect the post_delete signal for Volume temporarily, but > that's a hack. > > You probably have to abandon signals on the Volume model. I would attach > the post_delete signals logic directly to the Volume.delete() method and > add an option to disable signaling: > > class Volume(models.Model): > [....] > def my_signal_logic(self): > do_whatever() > > def delete(self, *args, **kwargs): > with_signal = kwargs.pop('signal', True) > if with_signal: > self.my_signal_logic() > super().delete(*args, **kwargs) > > > Then in the post_delete signal for Group, you delete the Volumes > explicitly, telling delete() not to signal: > > for v in instance.volumes.all(): > v.delete(signal=False) > > requests.delete('/group/%s' % instance.pk) > > > Erik -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/3b4b9f32-9b39-412f-9060-d94de7f72f61%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
