Load all observers (Ruby on Rails)

gistfile1.rb

# config/application.rb

module RailsApp
  class Application < Rails::Application
    # ...
    files = File.join(Rails.root, 'app', 'models') + File::SEPARATOR + '*_observer.rb'
    observers = []
    Dir[files].each do |file|
      observers << File.basename(file).gsub('.rb','').to_sym
    end
    config.active_record.observers = observers
    # ...
  end
end