Add Page position and parent_page_id

app/models/page.rb

@@ -1,16 +1,23 @@
 class Page < CouchFoo::Base
   
    property :name, String
-   property :parent_name, String
+   property :parent_page_id, String
    property :content, String
    property :layout_id, String
    property :layout_name, String
+   property :position, Integer
+   property :is_published, Boolean
    
    belongs_to :layout
+   has_many :children, :class_name => 'Page', :foreign_key => 'parent_page_id'
    
    validates_presence_of :name
+   validates_presence_of :position
    
    before_save :setup_layout_id
+   before_validation :setup_default_value
+   
+   default_sort :position
    
    def setup_layout_id
      if self.layout_name.blank?
@@ -20,4 +27,17 @@ class Page < CouchFoo::Base
      end
    end
     
+   protected
+   
+   def setup_default_value
+     unless self.position
+       max_page = Page.last( :use_key => 'position')
+       self.position = (max_page)? max_page.position.to_i + 1 : 1
+     end
+     
+     unless self.parent_page_id
+       self.parent_page_id = "root"
+     end
+   end
+    
 end