gistfile1.txt

require "rubygems"
require "mongoid"

Mongoid.configure do |config|
  name = "mongoid_bug"
  host = "localhost"
  config.master = Mongo::Connection.new.db(name) 
  config.persist_in_safe_mode = false
end

class Page
  include Mongoid::Document

  after_update  :write_update_activity

  identity :type => String
  field :title, :type => String
  referenced_in :account

  protected

  def write_update_activity
    puts "update callback"
  end
end

class Account
  include Mongoid::Document

  identity :type => String
  field :subdomain, :type => String
  index :subdomain, :unique => true 
  references_many :pages, :dependent => :destroy, :index => true, :autosave => true
end

account = Account.find_or_create_by(:subdomain => "mongoid")

page = Page.new(:title => "Mongoid")
account.pages << page

page.save