Mongoid::Config.settings = {
  "host" => "127.0.0.1",
  "database" => "testing"
}

class Item
  include Mongoid::Document
  embedded_in :list

  field :name

  def who_am_i
    puts metadata.name
  end
end


class List
  include Mongoid::Document
  embeds_many :cool_items, :class_name => 'Item'
  embeds_many :simple_items, :class_name => 'Item'

  field :name
end


List.delete_all

list = List.create!
list.cool_items.create!(:name => 'cool')
list.simple_items.create!(:name => 'uncool')

cool_item = list.cool_items.first
cool_item.who_am_i

simple_item = list.simple_items.first
simple_item.who_am_i