rails

The rails plugin provides tasks for running rails and rake commands commonly used during setup and deployment, such as for precompiling assets and migrating the database. Make sure the RAILS_ENV environment variable is set prior to running rails tasks. The env plugin is the preferred mechanism for this.

Settings

None.

Tasks

rails:assets_precompile

Builds the asset pipeline in preparation for deployment. This is necessary for Rails apps that use the asset pipeline, which is all new Rails apps by default. Running this task will execute this script:

cd /var/www/my-app/releases/<RELEASE_NUMBER> && bundle exec rake assets:precompile

rails:assets_precompile is intended for use as a deploy task. It is typically run just prior to core:symlink_current to activate a new release.

rails:console

Starts an interactive Rails console via SSH to the remote host. This task is intended for use as a run task and accepts command-line arguments. The arguments are passed through to the console. For example:

$ tomo run -- rails:console --sandbox

Will run this remote script:

cd /var/www/my-app/current && bundle exec rails console --sandbox

rails:db_migrate

Migrates the database by running:

cd /var/www/my-app/releases/<RELEASE_NUMBER> && bundle exec rake db:migrate

rails:db_migrate is intended for use as a deploy task. It is typically run just after bundler:install prior to activating a new release.

rails:db_seed

Loads seed data into the database. Seeds should be written to be idempotent, such that it is safe to seed the database on each deploy. Typically seeds are used to load reference data need for the app to function, or for example to create an initial admin user. This task runs the following script:

cd /var/www/my-app/releases/<RELEASE_NUMBER> && bundle exec rake db:seed

rails:db_seed is intended for use as a deploy task. Since seeds rely on the structure of the database, it is typically run just after rails:db_migrate.

rails:db_create

Runs bundle exec rake db:create to create the database. This task is intended for use as a setup task. It will be automatically skipped if the database already exists, so it is safe to re-run.

rails:db_schema_load

Runs bundle exec rake db:schema:load to load the schema from db/schema.rb into an existing database. This task is intended for use as a setup task after rails:db_create. It will be automatically skipped if the database already contains a schema, so it is safe to re-run.

rails:db_structure_load

Runs bundle exec rake db:structure:load to load the schema from db/structure.sql into an existing database. This task is intended for use as a setup task after rails:db_create. It will be automatically skipped if the database already contains a schema, so it is safe to re-run.

Helpers

These helper methods become available on instances of Remote when the rails plugin is loaded. They accept the same options as Remote#run.

remote.rails(*args, **options) → Tomo::Result

Runs bundle exec rails in within paths.release by default.

remote.rails("routes")
# $ cd /var/www/my-app/releases/20190604204415 && bundle exec rails routes

remote.rake(*args, **options) → Tomo::Result

Runs bundle exec rake in within paths.release by default.

remote.rake("db:migrate")
# $ cd /var/www/my-app/releases/20190604204415 && bundle exec rake db:migrate

remote.rake?(*args, **options) → true or false

Like rake but returns true if the command succeeds (exit status 0), otherwise false.

remote.rake?("db:migrate") # => true