View Source mix ecto.gen.migration (Ecto SQL v3.11.3)
Generates a migration.
The repository must be set under :ecto_repos
in the
current app configuration or given via the -r
option.
Examples
$ mix ecto.gen.migration add_posts_table
$ mix ecto.gen.migration add_posts_table -r Custom.Repo
The generated migration filename will be prefixed with the current timestamp in UTC which is used for versioning and ordering.
By default, the migration will be generated to the
"priv/YOUR_REPO/migrations" directory of the current application
but it can be configured to be any subdirectory of priv
by
specifying the :priv
key under the repository configuration.
This generator will automatically open the generated file if
you have ECTO_EDITOR
set in your environment variable.
Command line options
-r
,--repo
- the repo to generate migration for--no-compile
- does not compile applications before running--no-deps-check
- does not check dependencies before running--migrations-path
- the path to run the migrations from, defaults topriv/repo/migrations
Configuration
If the current app configuration specifies a custom migration module
the generated migration code will use that rather than the default
Ecto.Migration
:
config :ecto_sql, migration_module: MyApplication.CustomMigrationModule