fix foreign key should be ObjectID

app/models/component.rb

@@ -4,8 +4,19 @@ class Component < Item
     
   key :engine_name, String
   key :layout_name, String, :required => true
-  key :layout_id, String, :required => true
+  key :layout_id, ObjectId, :required => true
   
   belongs_to :layout
   
+  protected
+  
+  def setup_default_value
+    super
+    
+    if self.layout_name
+      self.layout_id = Layout.find_by_name( self.layout_name ).id
+    end
+    
+  end
+    
 end

app/models/item.rb

@@ -7,7 +7,7 @@ class Item
   key :name, String, :required => true, :index => true
 
   key :parent_name, String, :index => true
-  key :parent_id, String, :index => true
+  key :parent_id, ObjectId, :index => true
   
   key_i18n :title, String, :required => true
    
@@ -16,7 +16,7 @@ class Item
  
   validates_format_of :name, :with => /^[a-zA-Z-_]+$/
   belongs_to :parent, :class_name => "Item", :foreign_key => :parent_id
-  many :children, :class_name => "Item", :foreign_key => :parent_id
+  many :children, :class_name => "Item", :foreign_key => :parent_id, :dependent => :destroy
   
   before_validation :setup_default_value
     
@@ -44,11 +44,6 @@ class Item
     else
       self.parent_id = Item.find_by_name( self.parent_name ).id
     end    
-    
-    if self.layout_name
-      self.layout_id = Layout.find_by_name( self.layout_name ).id
-    end
-    
   end
     
 end

app/models/page.rb

@@ -4,8 +4,19 @@ class Page < Item
   
   key_i18n :content, String
   key :layout_name, String, :required => true
-  key :layout_id, String, :required => true
+  key :layout_id, ObjectId, :required => true
   
   belongs_to :layout
   
+  protected
+  
+  def setup_default_value
+    super
+    
+    if self.layout_name
+      self.layout_id = Layout.find_by_name( self.layout_name ).id
+    end
+    
+  end
+  
 end