Adding indexes to model fields in Django with migrations

Question

I am trying to add indexes on model fields using Field.db_index for an app that has migrations. Looking at Django\'s documentation all I need to do is to set

Answer 1

OK, I managed to create the indexes using Meta.index_together. It is not the cleanest way, since I am not actually indexing multiple fields together but it works with makemigrations:

class Person(models.Model):
    class Meta():
        index_together = [['last_name']]
    first_name = models.CharField()
    last_name = models.CharField()

Now makemigrations does make a new migration:

./manage.py makemigrations app-name

>>Migrations for 'app-name':
>>  0005_auto_20140929_1540.py:
>>    - Alter index_together for Person (1 constraint(s))

And the corresponding sql command is actually CREATE INDEX.

./manage.py sqlmigrate app-name 0005_auto_20140929_1540

>>BEGIN;
>>CREATE INDEX app-name_person_last_name_7...4_idx ON `app-name_person` (`last_name`);
>>COMMIT;