gistfile1.rb

require 'pp'
require 'rubygems'
require 'mongo_mapper'

MongoMapper.connection = Mongo::Connection.new
MongoMapper.database = 'testing'

class Address
	include MongoMapper::EmbeddedDocument
	key :address, String
end

class Person
	include MongoMapper::Document
	many :addresses
end

Person.collection.remove

person = Person.new
person.addresses << Address.new(:address => 'Home sweet home')
person.save

pp person
pp person.addresses

person.reload

pp person
pp person.addresses
pp Person.collection.find.to_a