django sum get 0 if none

1from django.db.models.functions import Coalesce
2
3answers = Answer.objects.filter(<something here>)
4                        .annotate(score=Coalesce(Sum('vote__type'), 0))
5                        .order_by('-score')

1answers = Answer.objects.filter(<something here>)
2                        .annotate(score=Coalesce(Sum('vote__type'), 0))
3                        .order_by('-score')