Re: annotations only in 1.1 ?

On Jul 31, 12:54 pm, gentlestone <tibor.b...@xxxxxxxxxxx> wrote:
> I want find all instances of model KeyWord, where ManyToMany field
> categories is empty. I think in versieon 1.1 is the appropriate code
> like this:
>
> ... KeyWord.objects.annotate(cnt = Count(categories)).filter(cnt =
> 0) ...
>
> What is the similar code in old version 1.0 for resolve the same
> result. Should I use extra() method and go to the table level
> (SELECT ...) ?

You don't need annotations for this at all.

    KeyWord.objects.filter(category__isnull=True)

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