Django aggregate Count only True values

Updated for Django 1.10. You can perform conditional aggregation now:

from django.db.models import Count, Case, Whenquery_set.aggregate(bool_col=Count(Case(When(my_bool_col=True, then=1))))

More information at:

• https://docs.djangoproject.com/en/1.11/ref/models/conditional-expressions/#case

Update:

Since Django 1.10 you can:

from django.db.models import Count, Case, Whenquery_set.aggregate(    bool_col=Count(        Case(When(my_bool_col=True, then=Value(1)))    ))

Read about the Conditional Expression classes

Old answer.

It seems what you want to do is some kind of "Conditional aggregation". Right now Aggregation functions do not support lookups like filter or exclude: fieldname__lt, fieldname__gt, ...

So you can try this:

django-aggregate-if

Description taken from the official page.

Conditional aggregates for Django queries, just like the famous SumIf and CountIf in Excel.

You can also first annotate the desired value for each team, I mean count for each team the ammount of True in the field you are interested. And then do all the aggregation you want to do.

Another Solution for count Bool is:

from django.db.models import Sum, IntegerFieldfrom django.db.models.functions import CastModel.objects.filter(id=pk).annotate(bool_col=Sum(Cast('my_bool_col', IntegerField())))

Just convert False to 0 and True to 1, and then just Sum