Many thanks Malcolm. That nailed it.  So simple when you know how!

MerMer

On Apr 19, 2:56 am, Malcolm Tredinnick <[EMAIL PROTECTED]>
wrote:
> On Wed, 2007-04-18 at 23:28 +0100, Merric Mercer wrote:
> > I'm have the following three Models.
>
> > 1.Category Model
>
> > 2. Promotion Model
> >     - Has a many to many relationship with Category.
> >     -  Is the Parent of the Cash Model.
>
> > 3.Cash Model
> >   - Has one to one relationship with Promotion.
>
> > I want to create a query set of  Cash Objects, filtered by a specific
> > Category.id
>
> > I'm sure that there must be simple solution - but having looked through
> > the forums I just can't figure how to do it.
>
> > Can anybody please advise.
>
> Wtihout seeing your models (what you called the fields, etc) it's hard
> to be precise, but the following should do what you want:
>
>         Cash.objects.filter(promotion__category=6)
>
> I'm assuming the one-to-one field in Cash is called "parent" and the
> Category field in Promotion is called "category".
>
> Regards,
> Malcolm


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