On Jun 3, 3:05 pm, Alex Gaynor <alex.gay...@gmail.com> wrote:
> On Wed, Jun 3, 2009 at 3:03 PM, Don Spaulding <donspauldin...@gmail.com>wrote:
>
>
>
>
>
> > bump.
>
> > Can anyone tell me if this looks like a bug in Django?
>
> > On Jun 1, 6:12 pm, Don Spaulding <donspauldin...@gmail.com> wrote:
> > > Hi all,
>
> > > I've got a quick use case that I think should work according to the
> > > docs, but it's not. In this case, Domain objects have a reverse fkey
> > > relation named "reports", and the Report model has an "updated"
> > > field. I'd like to annotate and order Domains by the max value of
> > > "updated" for all related reports. The following interactive session
> > > shows the behavior pretty well.
>
> > > >>> qs =
> > Domain.objects.annotate(last_updated=Max('reports__updated')).order_by('last_updated')
> > > >>> qs.count()
> > > 1577
> > > >>> print qs[0].last_updated
>
> > > IndexError: list index out of range>>> qs.count()
>
> > > InternalError: current transaction is aborted, commands ignored until
> > > end of transaction block
>
> > > >>> connection._rollback()
>
> > > If I drop off the order_by call, things appear to work again.
>
> > > >>> qs = Domain.objects.annotate(last_updated=Max('reports__updated'))
> > > >>> qs.count()
> > > 1577
> > > >>> print qs[0].last_updated
>
> > > 2009-05-28 13:25:55.027600
>
> > > What am I missing here (besides a thorough understanding of
> > > aggregation)?
>
> It looks like a bug in django at first glance. Out of curiosity what
> version of Django is it, since it looks a tiny bit like an old bug with
> queryset chaining, but I think that was fixed even before the first beta.
>>> django.get_version()
u'1.1 beta 1 SVN-10916'
--~--~---------~--~----~------------~-------~--~----~
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
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
