1.当作业文件列表为空时报403错提示改为alert提示

2.异常捕获代码后给出js提示：暂时不能下载此文件

app/controllers/zipdown_controller.rb

@@ -43,7 +43,7 @@ class ZipdownController < ApplicationController
           zipfile = zip_homework_by_user homework
           send_file zipfile, :filename => homework.name+".zip", :type => detect_content_type(zipfile) if(zipfile)
         else
-          render_403 :message => :no_file_dowmload
+          render file: 'zipdown/no_file_dowmload.js.erb'
         end
       else
         render_403 :message =>:notice_file_not_found
@@ -52,7 +52,7 @@ class ZipdownController < ApplicationController
       render_403 :message => :notice_not_authorized
     end
   rescue => e
-    render file: 'public/file_not_found.html'
+    render file: 'zipdown/file_not_fond.js.erb'
   end
 
   private

app/views/bids/_homework_list.html.erb

@@ -106,7 +106,7 @@
             <td>
               <strong>提交文件:&nbsp;
                 <% if is_evaluation  || is_teacher%>
-                  <%= link_to "打包下载", :controller => "zipdown", :action => "download_user_homework",:homework => homework%>
+                  <%= link_to "打包下载", :controller => "zipdown", :action => "download_user_homework",:homework => homework, :remote => true%>
                 <% else %>
                     <span class="required">未开启互评功能作业不允许下载</span>
                 <% end %>

app/views/zipdown/file_not_fond.js.erb

@@ -0,0 +1 @@
+alert("对不起，这个文件暂时不能下载。 ");

app/views/zipdown/no_file_dowmload.js.erb

@@ -0,0 +1 @@
+alert('<%=l(:no_file_dowmload)%>');