On Thu, Oct 28, 2010 at 2:54 AM, Roald de Vries <downa...@gmail.com> wrote:
> I quite often reference foreign keys of foreign keys of foreign keys...
> Wouldn't it be nice to have a 'through'-parameter for ForeignKey's?
>
> class A(Model):
> b = ForeignKey('B')
> c = ForeignKey('C', through='B', related_name='a_set')
>
> class B(Model):
> c = ForeignKey('C')
>
>
> The advantages of a field A.c wrt a property A.c:
> - it creates a reverse relation, so C.a_set becomes available
> - c becomes queryable: A.objects.filter(c=x)
Hi Roald,
Thanks for suggesting this. I don't think it's worth implementing,
though, because you can already query across multiple foreign-key
relationships like this:
A.objects.filter(b__c__exact=x)
As for making C.a_set available, I'd suggest just doing
A.objects.filter(b__c__exact=c_instance) in your view, and that'll get
the job done.
Adrian
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