AGG SQL

aggclass.rb

class Song < ActiveRecord::Base
  composed_of :songinfo, :class_name => "SongInfo", :mapping => [%w(title, title)]
end

aggconnect.rb

require 'active_record'
ActiveRecord::Base.establish_connection(:database => "test.db", :adapter => "sqlite3")

aggdb.sql

CREATE TABLE songs(
id INTEGER PRIMARYKEY AUTOINCREMENTED,
title VARCHAR
);

aggfind.rb

song = Song.find(1)
song.title == "Red House"

aggsec.rb

song = Song.new
song.songinfo = SongInfo.new("Red House")
song.save
song.title == "Red House"