diff --git a/app/models/layout.rb b/app/models/layout.rb
index 10693f26..b22a3c67 100644
--- a/app/models/layout.rb
+++ b/app/models/layout.rb
@@ -6,6 +6,8 @@ class Layout
    key :description, String
    key_i18n :content, String
    
+   many :children, :class_name => "Item", :foreign_key => "layout_id", :dependent => :nullify
+   
    validates_format_of :name, :with => /^[a-zA-Z-_]+$/
    
 end
\ No newline at end of file
diff --git a/lib/tasks/dev.rake b/lib/tasks/dev.rake
index a18a5d99..01244b36 100644
--- a/lib/tasks/dev.rake
+++ b/lib/tasks/dev.rake
@@ -2,7 +2,7 @@ namespace :dev do
   
   task :build => :environment do
     [Announcement, Item, Snippet, Layout].each { |m| m.delete_all }
-      Layout.create!( :name => 'root', :content_zh_tw => File.open("#{RAILS_ROOT}/lib/template/root.layout.zh_tw").read,
+      Layout.create!( :name => 'root', :description => 'root', :content_zh_tw => File.open("#{RAILS_ROOT}/lib/template/root.layout.zh_tw").read,
                                       :content_en => File.open("#{RAILS_ROOT}/lib/template/root.layout.en").read)
 
       Page.create!( :name => "root", :title => I18n.t(:homepage), :layout_name => "root", :parent_name => nil,