精品课程列表中的全部课程可点击动态数排序

app/controllers/admin_controller.rb

@@ -65,9 +65,18 @@ class AdminController < ApplicationController
 
   #精品课程下的全部课程
   def excellent_all_courses
-    @name = params[:name]
-    @courses = Course.like(@name).order('created_at desc')
-    @courses = paginateHelper @courses,30
+    name = params[:name]
+    @order = ""
+    if params[:order] == 'asc'
+      courses = Course.find_by_sql("SELECT c.*,count(c.id) FROM courses c,course_activities ca WHERE c.id = ca.course_id AND c.name like '%#{name}%' GROUP BY c.id ORDER BY count(c.id) asc, c.id desc")
+      @order = params[:order]
+    elsif params[:order] == 'desc'
+      courses = Course.find_by_sql("SELECT c.*,count(c.id) FROM courses c,course_activities ca WHERE c.id = ca.course_id AND c.name like '%#{name}%' GROUP BY c.id ORDER BY count(c.id) DESC, c.id desc")
+      @order = params[:order]
+    else
+      courses = Course.like(name).order('created_at desc')
+    end
+    @courses = paginateHelper courses,30
     @page = (params['page'] || 1).to_i - 1
     respond_to do |format|
       format.html

app/views/admin/excellent_all_courses.html.erb

@@ -48,8 +48,8 @@
       <th style="width: 50px;">
         帖子数
       </th>
-      <th style="width: 50px;">
-        动态数
+      <th style="width: 50px;" class = "<%= @order == 'desc' ? 'st_up' : (@order == 'asc' ? 'st_down' : '') %>">
+        <%=link_to '动态数', excellent_all_courses_path(:order=> @order == "desc" ? 'asc' : 'desc') %>
       </th>
       <th style="width: 40px;">
       </tr>