Ecto SQL v3.1.1 mix ecto.rollback View Source

Reverts applied migrations in the given repository.

Migrations are expected at "priv/YOUR_REPO/migrations" directory of the current application, where "YOUR_REPO" is the last segment in your repository name. For example, the repository MyApp.Repo will use "priv/repo/migrations". The repository Whatever.MyRepo will use "priv/my_repo/migrations".

You can configure a repository to use another directory by specifying the :priv key under the repository configuration. The "migrations" part will be automatically appended to it. For instance, to use "priv/custom_repo/migrations":

config :my_app, MyApp.Repo, priv: "priv/custom_repo"

This task runs all pending migrations by default. Runs the last applied migration by default. To roll back 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.

The repositories to rollback are the ones specified under the :ecto_repos option in the current app configuration. However, if the -r option is given, it replaces the :ecto_repos config.

If a repository has not yet been started, one will be started outside your 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 --to 20080906120000

Command line options

-r, --repo - the repo to rollback
--all - revert all applied migrations
--step / -n - revert n number of applied migrations
--to - 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)
--log-sql - log the raw sql migrations are running
--no-compile - does not compile applications before rolling back
--no-deps-check - does not check depedendencies before rolling back