Add UserAttribute model, suppose it will store user model want to use which attribute group

lib/tasks/dev.rake

@@ -2,7 +2,10 @@ namespace :dev do
   
   task :build => :environment do
     User.delete_all
-    User.create!( :email => 'ihower@rulingcom.com', :password => 'password', :password_confirmation => 'password' )
+    User.create!( :email => 'ihower@rulingcom.com', :password => 'password', :password_confirmation => 'password', :use_attributes => ["teacher"] )
+    
+    UserAttribute.create!( :ident => "teacher", :name => "Teacher", :attrs => [ "name"  => { :type => 'text_field', :width => 100 }, 
+                                                           "title" => { :type => 'text_field', :width => 100 } ] )
     
     [Announcement, Item, Snippet, Layout].each { |m| m.delete_all }
       Layout.create!( :name => 'root', :description => 'root', :content_zh_tw => File.open("#{RAILS_ROOT}/lib/template/root.layout.zh_tw").read,