消息500

app/models/tiding.rb

@@ -254,7 +254,7 @@ class Tiding < ActiveRecord::Base
         elsif self.tiding_type == "Comment"
           container.present? ? ("评论了你" + (container.parent.present? ? "的回复：" : "发布的项目issue：") + message_content(container.notes)) : ""
         else
-          "更新了Issue：#{container.issue.subject}"
+          "更新了Issue：#{container.try(:issue).try(:subject)}"
         end
       when 'Issue'
         "指派了Issue给你：" + container.subject

public/update.html

@@ -58,6 +58,6 @@ If you continue to experience problems please contact your Trustie administrator
         <p class="font-18">
             平台拟于<span style="color: red">2019年4月27日17:00--18:30</span>进行全面升级，带来不便，敬请谅解！
         </p>
-    </div>
+    </div>user_tidings.html.erb
 </body>
 </html>