django static annotation

Question

I want to add a static value to the results of a database query using django (so not using \'raw\' SQL)

For example, if I have an object Car with fields make, model, and

Answer 1

Update

This solution uses soon-to-be-deprecated API. See this answer for a better way to solve this.

Original Answer

You can use the extra() method. Like this:

Car.objects.all().extra(select = {'sales': 0})

Answer 2

As of Django 1.8, annotate features Value expression:

from django.db.models import Value, IntegerField

cars= Car.objects.all().annotate(sales=Value(0, IntegerField()))

Instead of IntegerField you can use all available db fields classes.