作业全部附件打包下周无法下载

app/views/student_work/index.html.erb

@@ -42,7 +42,7 @@
             <%= link_to "附件", "javascript:void(0)", class: "down_btn fr", :onclick => "alert('没有学生提交作业，无法下载附件')" %>
         <% else%>
             <%= link_to "附件", zipdown_assort_path(obj_class: @homework.class, obj_id: @homework, format: :json),
-                    remote: true, class: "down_btn fr" %>
+                    remote: true, class: "down_btn fr", :id => "download_homework_attachments" %>
         <% end%>
 
         <a  class="down_btn fr" href="javascript:void(0);">列表</a>

public/javascripts/application.js

@@ -897,8 +897,31 @@ $(function(){
 
             }
         }
+    });
+    $('#download_homework_attachments').bind('ajax:complete', function (event, data, status, xhr) {
+        if(status == 'success'){
+            var res = JSON.parse(data.responseText);
+            if(res.length<1){
+                return;
+            }
+            if(res.length==1){
+                location.href = '/zipdown/download?file='+res[0].file;return;
+            }
+            document.getElementById('light').style.display='block';
+            $container = $('#light .upload_box_ul');
+            $container.empty();
+            for(var i = 0; i <res.length; ++i){
+                var des = '';
+                if(res.count > 1){
+                    des = '第'+res[i].index+'-'+(res[i].count+res[i].index-1)+'个学生的作品下载';
+                } else {
+                    des = '第'+res[i].index+'个学生的作品下载';
+                }
+                $('<li><span class="upload_box_span" >'+(i+1)+'.</span> <a href="/zipdown/download?file='+res[i].file+'">'+des+'</a><span class="c_grey">&nbsp;&nbsp;（共'+res[i].size+'M）</span> </li>').appendTo($container);
 
-    })
+            }
+        }
+    });
 });