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Python

Jonathan Huppi
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Jonathan Huppi
Front End Web Development Techdegree Graduate 42,048 Points
Posted by Jonathan Huppi
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Jonathan Huppi
Front End Web Development Techdegree Graduate 42,048 Points

django-admin migrate [app_label] [migration_name]

I've been working on a Django project for a while now, and have realized that my initial model structure isn't ideal. I'd rather not flush my database and delete the tables, because it takes a while and its easy to make errors. During my search for a quicker/safer solution I came across this command:

django-admin migrate [app_label] [migration_name]

According to the docs, '<app_label> <migrationname>: Brings the database schema to a state where the named migration is applied, but no later migrations in the same app are applied. This may involve unapplying migrations if you have previously migrated past the named migration. Use the name zero to unapply all migrations for an app.'

I tried using 'zero' to unapply all migrations, but when I went to make a new migration Django didn't override the initial migration. The new migration was simply added in order to the previous migrations.

Am I missing something here?

Benjamin Lange
Benjamin Lange
16,178 Points
Benjamin Lange
Benjamin Lange
16,178 Points

Once you update your model and are ready to apply a migration, there are two commands to run.

  1. python manage.py makemigrations [app_name]
  2. python manage.py migrate [app_name]

If you need to rollback a migration, run the following to get the name of each migration that you have so far.

  1. python manage.py showmigrations [app_name]
  2. Then, run python manage.py migrate [app_name] [migration_name] to rollback to a previous migration point.
  3. Then, you can safely delete the failed migration file from your [app_name]/migrations folder.