Django: Adding “NULLS LAST” to query

Question

I would like to sort a model by using Postgresql\'s \"NULLS LAST\" option. How could it be done?

I tried something like

MyModel.objects.all().extra(ord

Answer 1

This was probably not available when the question was asked, but since Django 1.8 I think this is the best solution:

from django.db.models import Coalesce, Value
MyModel.objects.all().annotate(price_null=
    Coalesce('price', Value(-100000000)).order_by('-price_null')

Coalesce selects the first non-null value, so you create a value price_null to order by which is just price but with null replaced by -100000000 (or +?).