A celery task isn't always about the data... For instance sending a
confirmation e-mail when e-mail address is updated:

1. Update e-mail address
2. Start celery task to send e-mail to confirm new e-mail address

If the updating the e-mail address failed, its going to send e-mail to
their current e-mail address, not the one they tried updating to.

Another example specific to what i'm doing...  Someone updates the sessions
they are attending at a conference, you want to notify the event planners
and the speakers of the sessions they were/are now attending.  So you fire
off a task to do that... but if it failed to update that info I don't want
to alert everyone that it changed... because it didn't.

But since its an update there is *some* data there, so the task will be
able to complete just fine but its invalid data.

On Fri, Nov 4, 2011 at 12:56 PM, Łukasz Oleś <[email protected]> wrote:

> If transaction is not completed then data is not in database, so I
> can't select it.
> I really don't see problem here.
>
>
>
> On 28 Paź, 17:25, John Anderson <[email protected]> wrote:
> > How did you hook up your celery tasks to only execute if the transaction
> on
> > the request committed?
> >
> >
> >
> >
> >
> >
> >
> > On Fri, Oct 28, 2011 at 9:35 AM, Łukasz Oleś <[email protected]>
> wrote:
> > > Hi,
> >
> > > I'm using celery with pyramid without any problems.
> > > I'm using pyramid_tm module which uses transaction module.
> >
> > > On 28 Paź, 09:36, John Anderson <[email protected]> wrote:
> > > > I was wondering if any of you guys have used celery with Pyramid.
> I'm
> > > > looking for a way to have my tasks only execute if the db transaction
> > > > commits.   That way any data the task expects is in the db and the
> task
> > > only
> > > > executes if the data is valid.
> >
> > > --
> > > Łukasz Oleś
> >
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