Rails应用程序设置

我正在创建两个相关的Rails应用程序,我注意到许多非干工作。

例如, @title 在各种控制器方法中设置的字段执行相同的操作,应用程序标题除外,如:

# SiteController (application 'Abc')
def SiteController < ApplicationController
  def index
    @title = 'Abc'
  end
  def about
    @title = 'about Abc'
  end
  def news
    @title = 'Abc news'
  end
  def contact
    @title = 'contact Abc'
  end
end

还有:

# SiteController (application 'Xyz')
def SiteController < ApplicationController
  def index
    @title = 'Xyz'
  end
  def about
    @title = 'about Xyz'
  end
  def news
    @title = 'Xyz news'
  end
  def contact
    @title = 'contact Xyz'
  end
end

我想做的是

# SiteController
def SiteController < ApplicationController
  def index
    @title = "#{ApplicationTitle}'
  end
  def about
    @title = "about #{ApplicationTitle}"
  end
  def news
    @title = "#{ApplicationTitle} news"
  end
  def contact
    @title = "contact #{ApplicationTitle}"
  end
end

我想知道的是:应该在哪里定义不可更改的应用程序设置。它在config/*rb文件中吗?它在.yaml文件中吗?

提前谢谢