class Item include MongoMapper::Document key :_type, String key :name, String, :required => true, :index => true key :full_name, String, :required => true, :index => true key :parent_id, ObjectId, :index => true key_i18n :title, String, :required => true key :position, Integer, :required => true key :is_published, Boolean, :required => true, :default => true, :index => true validates_format_of :name, :with => /^[0-9a-zA-Z\-_]+$/ validates_uniqueness_of :name, :scope => :parent_id belongs_to :parent, :class_name => "Item", :foreign_key => :parent_id many :children, :class_name => "Item", :foreign_key => :parent_id, :dependent => :destroy before_validation :setup_default_value attr_writer :parent_name def parent_name self.parent.name end def self.find_by_name(item_name) Item.find(:first, :conditions => { :name => item_name, :is_published => true }) end def ancestors node, nodes = self, [] nodes << node = node.parent while !node.parent.blank? nodes.reverse end def url urls = ancestors.map{ |a| a.name } << self.name urls.delete("root") "/#{urls.join("/")}" end protected def setup_default_value if self.position.blank? max_page = Page.find(:last, :order => 'position') self.position = (max_page)? max_page.position.to_i + 1 : 1 end if self.parent_name.blank? self.parent_name = nil self.parent_id = nil else self.parent_id = Item.find_by_name( self.parent_name ).id end full_node = self.ancestors.map{ |a| a.name }.push( self.name ) full_node.shift if full_node.size >= 2 self.full_name = full_node.join("/") end end