In askbot/migrations there are (currently) 14 python scripts that set up a database to be used with Askbot. Three of these files load plpgsql scripts from askbot/search/postgresql into the database.
On the one hand, the choice of the plpgsql scripts to use and the content of the migration scripts looks like the migrations were created manually. On the other hand the migration script filenames look like the migrations were create by python manage.py makemigrations.