Ecto.Migrator.down

You're seeing just the function down, go back to Ecto.Migrator module for more information.

down(repo, version, module, opts \\ [])

Runs a down migration on the given repository.

Options

:log - the level to use for logging. Defaults to :info. Can be any of Logger.level/0 values or a boolean.
:log_sql - the level to use for logging of SQL instructions. Defaults to false. Can be any of Logger.level/0 values or a boolean.
:prefix - the prefix to run the migrations on
:dynamic_repo - the name of the Repo supervisor process. See Ecto.Repo.put_dynamic_repo/1.