def menu_from_model(model)
    model.find(:all).inject(root_item(model.to_s)) { |root, item| root.items << m_item(menu, item.name); root }
  end
  def menu_from_model(model)
    menu = root_item(model.to_s)
    model.find(:all).each do |item|
      menu.items << m_item(menu, item.name)
    end
    menu
  end