[翻译] Rails::Railtie

# lib/my_gem/railtie.rb
module MyGem  
  class Railtie < Rails::Railtie  
  end
end
# lib/my_gem.rb
require ‘my_gem/railtie‘ if defined?(Rails)

class MyRailtie < Rails::Railtie  
  initializer "my_railtie.configure_rails_initialization" do   
    # some initialization behavior  
  end
end

class MyRailtie < Rails::Railtie  
  initializer "my_railtie.configure_rails_initialization" do |app|        
    app.middleware.use MyRailtie::Middleware  
  end
end

class MyRailtie < Rails::Railtie  
 # 定制 ORM
  config.app_generators.orm :my_railtie_orm  
  # Add a to_prepare block which is executed once in production  
  # and before each request in development  
  config.to_prepare do   
    MyRailtie.setup!  
  end
end

class MyRailtie < Rails::Railtie  
  rake_tasks do   
    load "path/to/my_railtie.tasks"  
  end
end

class MyRailtie < Rails::Railtie  
  generators do   
    require "path/to/my_railtie_generator"  
  end
end