4.4 Additional Layout Options

You can specify layout options at the controller class level if you want to reuse layouts for multiple actions.

class EventController < ActionController::Base 
  layout "events", only: [:index, :new] 
  layout "global", except: [:index, :new]
end

The layout method can accept either a String Symbol, or boolean, with a hash of arguments after:

• String Determines the template name to use.
• Symbol Call the method with this name, which is expected to return a string with a template name.
• true Raises an argument error.
• false Do not use a layout.

The optional arguments are either :only or :except and expect an array of action names that should or should not apply to the layout being specified.