gistfile1.txt

#https://gist.github.com/786350
module Names
  def self.included(klass)
    klass.extend ClassLevelMethods
    klass.send(:attr_reader, :displayed_attribute_info)
  end
  
  def to_s
    "<#{self.class.name} " +
    self.class.displayed_attribute_info.map do |attr_name, label|
      "#{label}: #{send(attr_name)}"
    end.join(", ") +
    ">"
  end
  
  module ClassLevelMethods
    def displayed_attribute(attribute_name, options = {})
      @displayed_attribute_info ||= {}
      attr_accessor attribute_name
      @displayed_attribute_info[attribute_name] = options[:label] || attribute_name
    end
  end
end

Object.send(:include, Names)

class Person
  displayed_attribute :name
  displayed_attribute :age
  displayed_attribute :ssn, :label => "Social Security Number"
  attr_accessor :foo
end

chad = Person.new
chad.age = 40
chad.name = "Chad Fowler"
chad.ssn = "444-222-1111"
puts chad.to_s
#"<Person age: 40, name: Chad Fowler, Social Security Number: 444-222-1111>"