Automatic Observer Registration

application.rb

module AppName
  class Application < Rails::Application
    config.encoding = "utf-8"
    config.filter_parameters += [:password]
    config.assets.enabled = true
    config.assets.version = '1.0'

    # registers any file in the app/observers directory as an observer
    observers = [] # Register all observers in the observers folder.
    pattern = File.join(Rails.application.config.root, 'app', 'observers', '**', '*.rb')
    Dir.glob(pattern).each { |f| observers << File.basename(f, '.rb').to_sym }
    config.active_record.observers = observers
  end
end