On Wed, May 27, 2009 at 9:58 AM, mettwoch <mettw...@pt.lu> wrote:
>
> Thanks Alex, but then I wonder if it would be reasonable to move this
> kind of simple rules to a "view" in the database and let Django access
> the view rather than the raw table.
>
> Any experience with that?
>
> Marc
>
> On May 27, 4:49 pm, Alex Gaynor <alex.gay...@gmail.com> wrote:
> > On Wed, May 27, 2009 at 9:45 AM, mettwoch <mettw...@pt.lu> wrote:
> >
> > > Hi Group,
> >
> > > I wonder if there's a way to aggregate an expression like:
> >
> > > Sum("quantity*price")
> >
> > > on a model having "quantity" and "price" fields.
> >
> > > Marc
> >
> > No, there isn't currently a way to do this, besides writing a custom
> > aggregate class (search the list for this if you want to do it, it isn't
> > that hard and there are several examples).
> >
> > Alex
> >
> > --
> > "I disapprove of what you say, but I will defend to the death your right
> to
> > say it." --Voltaire
> > "The people's good is the highest law."--Cicero
> >
>
That works, since you're using a version on the 1.1 path you can use
unmanaged models to handle this seemlessly.
http://docs.djangoproject.com/en/dev/ref/models/options/#django.db.models.Options.managed
Alex
--
"I disapprove of what you say, but I will defend to the death your right to
say it." --Voltaire
"The people's good is the highest law."--Cicero
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