Django Query Related Field Count

Question

I've got an app where users create pages. I want to run a simple DB query that returns how many users have created more than 2 pages.

This is essentially what I want to do, but of course it's not the right method:

User.objects.select_related('page__gte=2').count()

What am I missing?

Answer 1

You should use aggregates.

from django.db.models import Count
User.objects.annotate(page_count=Count('page')).filter(page_count__gte=2).count()

Answer 2

In my case, I didn't use last .count() like the other answer and it also works nice.

from django.db.models import Count

User.objects.annotate( our_param=Count("all_comments")).filter(our_param__gt=12)