Let nested route works

app/models/item.rb

@@ -15,7 +15,7 @@ class Item
   key :position, Integer, :required => true
   key :is_published, Boolean, :required => true, :default => true, :index => true
  
-  validates_format_of :name, :with => /^[a-zA-Z-_]+$/
+  validates_format_of :name, :with => /^[a-zA-Z\-_]+$/
   validates_uniqueness_of :name, :scope => :parent_id
   
   belongs_to :parent, :class_name => "Item", :foreign_key => :parent_id
@@ -52,7 +52,11 @@ class Item
       self.parent_id = nil
     else
       self.parent_id = Item.find_by_name( self.parent_name ).id
-    end    
+    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

app/models/snippet.rb

@@ -13,10 +13,22 @@ class Snippet
    before_validation :setup_default_value
    validates_uniqueness_of :name, :scope => :parent_id
    
+   belongs_to :parent, :class_name => "Snippet", :foreign_key => :parent_id
+     
    protected
 
+   def ancestors
+     node, nodes = self, []
+     nodes << node = node.parent while !node.parent.blank?
+     nodes.reverse
+   end
+   
    def setup_default_value
      self.parent_id = Item.find_by_name( self.parent_name ).id
+     
+     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