完成了课程资源列表的排序（上传时间，资源大小，下载次数）

app/controllers/admin_controller.rb

@@ -63,11 +63,18 @@ class AdminController < ApplicationController
   def course_resource_list
     #sort_init 'created_on','desc'
     #sort_update %w(filename filesize filetype created_on downloads author course)
-    if params[:file_size]
+    if params[:sort] == 'file_size'
+      @resource = Attachment.where(:container_type => 'Course').order("filesize desc")
+    elsif params[:sort] == 'file_upload'
+      @resource = Attachment.where(:container_type => 'Course').order("created_on desc")
+    elsif params[:sort] == 'file_download_times'
       @resource = Attachment.where(:container_type => 'Course').order("downloads desc")
     else
       @resource = Attachment.where(:container_type => 'Course').order("created_on desc")
     end
+
+
+
     @resource = paginateHelper @resource,30
     @page = (params['page'] || 1).to_i - 1
 

app/views/admin/course_resource_list.html.erb

@@ -16,10 +16,10 @@
         资源类型
       </th>
       <th style="width: 23px;">
-        上传时间
+        <%= link_to "上传时间",admin_course_resource_list_path(:sort => "file_upload") %>
       </th>
       <th style="width: 15px;">
-        下载次数
+        <%= link_to "下载次数",admin_course_resource_list_path(:sort => "file_download_times") %>
       </th>
       <th style="width: 20px;">
         上传者