What is mattr_accessor in a Rails module?

iteye_634

于 2008-10-30 13:52:46 发布

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分类专栏： rails 文章标签： Rails

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module Config
  mattr_accessor :hostname
  mattr_accessor :admin_email
end

#s short for:

module Config
  def self.hostname
    @@hostname
  end
  def self.hostname=(hostname)
    @@hostname = hostname
  end
  def self.admin_email
    @@admin_email
  end
  def self.admin_email=(admin_email)
    @@admin_email
  end
end


>> Config.hostname = "example.com"
>> Config.admin_email = "admin@example.com"
>> Config.hostname # => "example.com"
>> Config.admin_email # => "admin@example.com"