Feature Toggle in Rails

feature_flag.rb

class FeatureFlag
  def self.allow_comments?
    MomConfig['COMMENTS_SECTION_AVAILABLE'] == 'true'
  end
end

routes.rb

Application.routes.draw do
  root 'pages#welcome'
  get '/welcome' => 'pages#welcome'

  if FeatureFlag.allow_comments?
    get  '/comments' => 'comments#all'
    get  '/comment'  => 'comments#new'
    post '/comment'  => 'comments#create'
  end
end