Reverts applied migrations in the given repository.

The repository must be set under :ecto_repos in the current app configuration or given via the -r option.

By default, migrations are expected at “priv/YOUR_REPO/migrations” directory of the current application but it can be configured by specifying the :priv key under the repository configuration.

Runs the latest applied migration by default. To roll back to to a version number, supply --to version_number. To roll back a specific number of times, use --step n. To undo all applied migrations, provide --all.

If the repository has not been started yet, one will be started outside our application supervision tree and shutdown afterwards.

Examples

mix ecto.rollback
mix ecto.rollback -r Custom.Repo

mix ecto.rollback -n 3
mix ecto.rollback --step 3

mix ecto.rollback -v 20080906120000
mix ecto.rollback --to 20080906120000

Command line options

• -r, --repo - the repo to rollback
• --all - revert all applied migrations
• --step / -n - rever n number of applied migrations
• --to / -v - revert all migrations down to and including version
• --quiet - do not log migration commands
• --prefix - the prefix to run migrations on
• --pool-size - the pool size if the repository is started only for the task (defaults to 1)