On Mon, Sep 7, 2009 at 5:45 AM, andreas schmid <a.schmi...@gmail.com> wrote:
>
> hi list,
>
> im experiencing problems with the rating functionality described in the
> code sharing site in the practical django projects book:
>
> if i try to get the score of a snippet with {{ object.get_score }} in
> the template i get a result like:
>
> {'rating__sum': -2}
>
>
> why is that?
>
> def get_score(self):
> return self.rating_set.aggregate(Sum('rating'))
>
> this is the function i added to my Snippet model
>
>
The results you are getting are correct for the code you show. That
function returns the result of an aggregate() call, which returns a
dictionary of aggregate values (doc for aggregate is here:
http://docs.djangoproject.com/en/dev/ref/models/querysets/#aggregate-args-kwargs),
which is exactly what you show being displayed. If you want just the value
you'll need to extract it from the dictionary.
and the {{ rating.get_rating_display }} doesnt give me any output and no
> errors... does anyone know what the problem could be? or does anyone
> experieced those problems too and knows the solution for them?
>
>
Since I don't have the book you are working from nor know what the code site
is, and you haven't provided the code for get_rating_display I have no idea
what it is doing nor why it is failing. If it is using get_score and
expecting something other than a dictionary then fixing get_score might fix
it, but without checking the book to see what the intent of these functions
is supposed to be I'm not really sure of that.
Karen
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