How can I include null values in arithmetic query in django

Question

I have the field called surface_area which is null and float.

Now I can't set that to default 0 because 0 means something else in business rules.

I want to perform query like this

Room.objects.filter(surface_area__lte=40)

But this does not include null values.

How can I include null values as well for lte queries

Answer 1

You can check for null values like:

Room.objects.filter(surface_area__isnull=True)

And combine that with your lte :

from django.db.models import Q
Room.objects.filter( Q(surface_area__lte=40) | Q(surface_area__isnull=True) )