diff --git a/app/controllers/default_widget_controller.rb b/app/controllers/default_widget_controller.rb
index 7ace67656..fa7d12636 100644
--- a/app/controllers/default_widget_controller.rb
+++ b/app/controllers/default_widget_controller.rb
@@ -11,23 +11,26 @@ class DefaultWidgetController< OrbitWidgetController
   end
 
   def query_for_default_widget
-
     @ori_class_name =  @default_widget["query"].split('.')[0]
     @ori_query =  @default_widget["query"]
     result = nil
     result_objects = nil
     if !params["tag_id"].blank?
       if params["category_id"].blank? #has tag no cate
-        result =  eval("#{@ori_query}.where(:tagged_ids.in => params['tag_id'])")
+        result =  eval(@ori_query)
+        result.selector[:tagged_ids] = { "$in" => params['tag_id'].collect{|t| BSON::ObjectId(t)}}
       else #has tag and cate
-        result = eval("#{@ori_query}.where(:#{get_category_field_name}.in=>params['category_id'], :tagged_ids.in => params['tag_id'])")
+        result =  eval(@ori_query)
+        result.selector[get_category_field_name] = { "$in" => params['category_id'].collect{|t| BSON::ObjectId(t)}}
+        result.selector[:tagged_ids] = { "$in" => params['tag_id'].collect{|t| BSON::ObjectId(t)}}
       end
     elsif params["category_id"].blank?  #no tag no cate
       result = eval(@ori_query)
     else #no tag has cate
-      result = eval("#{@ori_query}.where(:#{get_category_field_name}.in=>params['category_id'])")
+      result = eval(@ori_query)
+      result.selector[get_category_field_name] = { "$in" => params['category_id'].collect{|t| BSON::ObjectId(t)}}
     end
-    result.available_for_lang(I18n.locale).can_display.desc(:created_at)
+    eval("result.#{@default_widget[:sorting_query]}")
   end
 
   def search_result
@@ -95,9 +98,9 @@ class DefaultWidgetController< OrbitWidgetController
   end
   
   def get_category_field_name
-    @ori_class_name = @ori_class_name.constantize
+    @ori_class_name = @ori_class_name.constantize unless @ori_class_name.is_a? Class
     @ori_class_name.fields.each_key do |key|
-      return key if key.include?('category_id')
+      return key.to_s if key.include?('category_id')
     end
     nil
   end
diff --git a/lib/orbit_app/module/widget.rb b/lib/orbit_app/module/widget.rb
index 9976c9ffb..99cb6de7b 100644
--- a/lib/orbit_app/module/widget.rb
+++ b/lib/orbit_app/module/widget.rb
@@ -102,12 +102,17 @@ module OrbitApp
           def  initialize(&block)
             @query = nil
             @image = nil
+	    @sorting_query = nil
             @more_link = {}
             @fields = []
             @enabled_styles = STYLE
              block.arity < 1 ? instance_eval(&block) : block.call(self) if block_given?
           end
 
+	  def sorting(query)
+	    @sorting_query = query
+	  end
+
           def enable(args)
             @enabled_styles = args
           end
@@ -122,7 +127,7 @@ module OrbitApp
           end
 
           def to_module_app_format
-            {"query"=>@query,"image"=>@image,"more_link"=>@more_link,"enabled_styles"=>@enabled_styles} rescue nil
+            {"query"=>@query,"image"=>@image,"more_link"=>@more_link,"enabled_styles"=>@enabled_styles,:sorting_query=>@sorting_query} rescue nil
           end
 
           def link_field(field_name,setting)
diff --git a/vendor/built_in_modules/announcement/init.rb b/vendor/built_in_modules/announcement/init.rb
index 0f58734a4..7c8396816 100644
--- a/vendor/built_in_modules/announcement/init.rb
+++ b/vendor/built_in_modules/announcement/init.rb
@@ -29,6 +29,7 @@ module Announcement
 
     widgets do
       default_widget do
+	sorting 'desc(:created_at)'
         query 'Bulletin.any_of( {deadline: nil,:postdate.lte => Time.now} , {:deadline.gte => Time.now,:postdate.lte => Time.now} )'
         enable ["typeA","typeB_style3","typeC"]
         image :image