A QuerySet by aggregate field value

Question

Let\'s say I have the following model:

class Contest:
    title = models.CharField( max_length = 200 )
    description = models.TextField()

class Image:
            


        

Answer 1

Oh, of course I forget about new aggregation support in Django and its annotate functionality.

So query may look like this:

Contest.objects.get(pk=id).image_set.annotate(score=Sum('vote__value')).order_by( 'score' )