gistfile1.rb

class Page < ActiveRecord::Base
  belongs_to :book
  attr_accessible :link, :summary, :title
  before_save :normalize_link, :unless => :title?
  def normalize_link.
    @title = @link.match( /(?<=http:\/\/)(.*)(?=.com)/ )
  end
  scope :title?, where(@title == True)
end