diff --git a/app/controllers/default_widget_controller.rb b/app/controllers/default_widget_controller.rb
index 1f946165..ef3d77bf 100644
--- a/app/controllers/default_widget_controller.rb
+++ b/app/controllers/default_widget_controller.rb
@@ -20,12 +20,12 @@ class DefaultWidgetController< OrbitWidgetController
       if params["category_id"].blank? #has tag no cate
         result = @ori_class_name.constantize.where(:tagged_ids.in => params["tag_id"])
       else #has tag and cate
-        result = eval("#{@ori_class_name}.where(:#{get_category_field_name(@ori_class_name)}.in=>params['category_id'], :tagged_ids.in => params['tag_id'])")
+        result = eval("#{@ori_class_name}.where(:#{get_category_field_name}.in=>params['category_id'], :tagged_ids.in => params['tag_id'])")
       end
     elsif params["category_id"].blank?  #no tag no cate
       result = eval(@default_widget["query"])
     else #no tag has cate
-      result = eval("#{@ori_class_name}.where(:#{get_category_field_name(@ori_class_name)}.in=>params['category_id'])")
+      result = eval("#{@ori_class_name}.where(:#{get_category_field_name}.in=>params['category_id'])")
     end
     result.available_for_lang(I18n.locale).can_display.desc(:is_top, :postdate)
   end
@@ -90,7 +90,7 @@ class DefaultWidgetController< OrbitWidgetController
     end
   end
   
-  def get_category_field_name()
+  def get_category_field_name
     @ori_class_name = @ori_class_name.constantize
     @ori_class_name.fields.each_key do |key|
       return key if key.include?('category_id')