Add Item#ancestors

app/models/item.rb

@@ -5,19 +5,30 @@ class Item
   key :_type, String
   
   key :name, String, :required => true, :index => true
-  key :parent_item_name, String, :required => true, :index => true
 
+  key :parent_name, String, :index => true
+  key :parent_id,  String, :index => true
+  
   key_i18n :title, String, :required => true
    
   key :position, Integer, :required => true
   key :is_published, Boolean, :required => true, :default => true, :index => true
+ 
+  belongs_to :parent, :class_name => "Item", :foreign_key => :parent_id
+  many :children, :class_name => "Item", :foreign_key => :parent_id
   
   before_validation :setup_default_value
  
   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
+
   protected
         
   def setup_default_value
@@ -26,8 +37,11 @@ class Item
       self.position = (max_page)? max_page.position.to_i + 1 : 1
     end
     
-    if self.parent_item_name.blank?
-      self.parent_item_name = "root"
+    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
   end
     

app/models/snippet.rb

@@ -3,7 +3,7 @@ class Snippet
    include MongoMapper::Document
   
    key :name, String, :required => true, :index => true
-   key :parent_item_name, String, :required => true, :index => true
+   key :parent_name, String, :required => true, :index => true
    key_i18n :content, String