gistfile1.rb

class Message
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming
  include ActiveModel::Serialization
  include ActiveModel::AttributeMethods
  
#  attr_accessor :body, :subject, :recipients, :documents, :sender
  define_attribute_methods [:body, :subject, :recipients, :documents, :sender]
  attr_accessor :attributes

  def initialize(attributes)
    @attributes = attributes
  end
end