class Item include Mongoid::Document include Mongoid::Timestamps field :name, :index => true field :full_name, :index => true field :parent_id, :index => true field :parent_name field :position, :type => Integer field :is_published, :type => Boolean, :default => true, :index => true validates_format_of :name, :with => /^[0-9a-zA-Z\-_]+$/ validates :name, :exclusion => { :in => LIST[:forbidden_item_names] } validates_uniqueness_of :name, :scope => :parent_id validates_presence_of :name, :full_name, :position, :is_published belongs_to :parent, :class_name => "Item" has_one :i18n_variable, :as => :language_value, :autosave => true, :dependent => :destroy has_many :children, :class_name => "Item", :as => 'parent' before_validation :setup_default_value def self.find_by_name(item_name) Item.first(:conditions => { :name => item_name, :is_published => true }) end # Get an array of ancestors def ancestors node, nodes = self, [] nodes << node = node.parent while !node.parent.blank? rescue nil nodes.reverse end # Build the url from the array of ancestors def url urls = ancestors.map{ |a| a.name } << self.name urls.join("/") end protected def setup_default_value # Set the position value within the parent scope if self.position.blank? max_page = Item.where(:parent_id => self.parent_id).count self.position = (max_page)? max_page + 1 : 1 end # Set the parent value self.parent_name = Item.first(:conditions => {:id => self.parent_id} ).name rescue nil # Build the full_name from the ancestors array full_node = self.ancestors.map{ |a| a.name }.push( self.name ) # Remove root node if not root full_node.shift if full_node.size >= 2 self.full_name = full_node.join("/") end # Enable the validation for parent_id def validates_presence_of_parent_id? true end end