邮件通知：发布作业链接域名错误问题

app/views/mailer/send_for_user_activities.html.erb

@@ -81,7 +81,7 @@
                                   :style => "color:#2E8DD7; float:left;display:block; margin-right:5px; margin-left:5px;  overflow:hidden; white-space: nowrap; text-overflow:ellipsis;"%>
                       <span class="wmail_txt" style="float:left; margin-right:5px;color:#ACAEB1;"><%= l(:label_course_homework) %></span>
 
-                      <%= link_to truncate(bid.name.html_safe,length: 30,omission: '...'), student_work_index_path(:homework => bid.id,:token => @token.value),
+                      <%= link_to truncate(bid.name.html_safe,length: 30,omission: '...'), student_work_index_url(:homework => bid.id,:token => @token.value),
                                   :class => 'wmail_info',
                                   :style => "color:#2E8DD7;float:left; font-weight:normal;margin-right:5px; display:block;overflow:hidden; white-space: nowrap; text-overflow:ellipsis;"
                       %>