Add mongoid-tree to Item

lib/tasks/items.rake

@@ -0,0 +1,19 @@
+# encoding: utf-8 
+
+namespace :items do
+  task :tree_changes => :environment do
+  	Item.all.each do |item|
+  		item.position -= 1
+  		item.parent_ids = ancestors(item)
+  		item.rename(:full_name, :path)
+  		item.save
+  	end
+  end
+
+  def ancestors(item)
+    node, nodes = item, []
+    nodes << node = node.parent while !node.parent.blank? rescue nil
+    nodes.reverse
+  end
+
+end