subclass AbstractContent.rb

class Question < AbstractContent
  acts_as_taggable
  
  serialize :body

  def answers
    self.body_source
  end
  
  def answers_html
    self.answers.map do |answer| 
      BlueCloth.new(answer).to_html
    end
  end
  
  def answers=(body)
    self.body = body
  end
end