消息报500

app/controllers/users_controller.rb

@@ -132,7 +132,7 @@ class UsersController < ApplicationController
       # 未读的消息存放在数组
       mess = message_all.message
       if (message_all.message_type != "SystemMessage"&& !mess.nil? && (mess.viewed == 0 || !mess.viewed)) || (message_all.message_type == "SystemMessage"&& !mess.nil? && mess.created_at > onclick_time)
-        unless (message_all.message_type == 'CourseMessage' && mess && mess.course.is_delete == 1)
+        unless (message_all.message_type == 'CourseMessage' && mess && mess.course  && mess.course.is_delete == 1)
           @message_alls << mess
         end
         break if @message_alls.length == 5
@@ -166,7 +166,7 @@ class UsersController < ApplicationController
         messages = MessageAll.where("(user_id =? and message_type !=?) or message_type =?" ,@user.id, "SystemMessage", "SystemMessage").includes(:message).order("created_at desc")
         messages.each do |message_all|
           mess = message_all.message
-          unless (message_all.message_type == 'CourseMessage' && mess && mess.course.is_delete == 1)
+          unless (message_all.message_type == 'CourseMessage' && mess && mess.course && mess.course.is_delete == 1)
             @message_alls << mess
           end
         end
@@ -177,7 +177,7 @@ class UsersController < ApplicationController
           # 在点击或者刷新消息列表后未读的消息存放在数组
           mess = message_all.message
           if message_all.message_type != "SystemMessage"&& !mess.nil? && (mess.viewed == 0 || !mess.viewed)
-            unless (message_all.message_type == 'CourseMessage' && mess && mess.course.is_delete == 1)
+            unless (message_all.message_type == 'CourseMessage' && mess && mess.course  && mess.course.is_delete == 1)
               @message_alls << mess
             end
           end

app/views/users/_user_message_course.html.erb

@@ -326,7 +326,7 @@
 
         </ul>
     <% end %>
-    <% if ma.course_message_type == "StudentWorksScore" %>
+    <% if ma.course_message_type == "StudentWorksScore" && ma.course_message %>
         <ul class="homepageNewsList fl">
           <li class="homepageNewsPortrait fl">
             <% if ma.course_message.reviewer_role == 3 %>