default widget link.

make sure to run
rake migrate:make_default_widget_work_config
for changing announcement module app

vendor/built_in_modules/announcement/app/models/bulletin.rb

@@ -77,6 +77,15 @@ class Bulletin
     string :bulletin_category_id
     end
   
+
+  def postdate_with_format
+    self[:postdate].strftime("%m/%d/%Y")
+  end
+
+  def bulletin_category_with_title
+    self.bulletin_category.title
+  end
+
   def share_item
       Item.first(conditions:{name: 'announcement'})
   end  

vendor/built_in_modules/announcement/config/locales/zh_tw.yml

@@ -15,3 +15,7 @@ zh_tw:
     search: 搜尋公告
     update_bulletin_success: 公告已成功更新
     update_bulletin_category_success: 公告類別已成功更新
+    default_widget:
+        bulletin_category_with_title: 分類
+        title: 標題
+        postdate_with_format: 張貼日期