add rough user attributes API

lib/tasks/dev.rake

@@ -2,11 +2,14 @@ namespace :dev do
   
   task :build => :environment do
     User.delete_all
+    UserAttribute.delete_all
+    
     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 } ] )
-    
+    UserAttribute.create!( :key => "teacher", :name => "Teacher", :attrs => [ { :name => "Name", :key => "name", :type => "text_field" }, { :name => "Title", :key => "title", :type => 'text_field' } ] )
+
+    UserAttribute.create!( :key => "staff", :name => "Staff", :attrs => [ { :name => "Name", :key => "name", :type => "text_field" }, { :name => "Duty", :key => "duty", :type => 'text_field' } ] )
+        
     [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,
                                       :content_en => File.open("#{RAILS_ROOT}/lib/template/root.layout.en").read)