Django migration with uuid field generates duplicated values

Question

I have a uuid field (not a primary key). The generated migration is:

from __future__ import unicode_literals

from django.db import migrations,          


        

Answer 1

(Answer taken from the first comment)

See the django docs - Migrations that add unique fields

They recommend changing your single migration into three separate migrations:

1. Create field, set to null but not unique
2. Generate unique UUIDs
3. Alter the field to be unique