管理员界面中的学校列表支持按用户数排序

app/controllers/admin_controller.rb

@@ -599,8 +599,19 @@ class AdminController < ApplicationController
 
   #学校列表
   def schools
-
+    @order = ""
+    @sort = ""
     @schools = School.find_by_sql("SELECT * FROM schools ORDER BY created_at DESC")
+    if params[:sort] && (params[:order]  == 'num')
+      @order = params[:order]
+      @sort = params[:sort]
+      @schools.each do |school|
+        count = UserExtensions.where("school_id = #{school.id} or occupation = '#{school.name}'").count
+        school[:infocount] = count.to_i
+      end
+      @sort == 'asc' ? (@schools = @schools.sort{|x,y| x[:infocount] <=> y[:infocount] }) : (@schools = @schools.sort{|x,y| y[:infocount] <=> x[:infocount]})
+    end
+
     @school_count = @schools.count
 
     @school_pages = Paginator.new @school_count, 30, params['page'] || 1

app/helpers/school_helper.rb

@@ -1,6 +1,6 @@
 module SchoolHelper
   def schoolMember_num school
-    count = student_num(school) + teacher_num(school)
+    count = UserExtensions.where("school_id = #{school.id} or occupation = '#{school.name}'").count
     count.to_s
   end
 

app/views/admin/schools.html.erb

@@ -20,8 +20,8 @@
       <th style="width: 100px;">
         学校名称
       </th>
-      <th style="width: 35px;">
+      <th style="width: 35px;" class = "<%= @order == 'num' ? (@sort == 'desc' ? 'st_up' : (@sort == 'asc' ? 'st_down' : '')) : '' %>">
-        用户数
+        <%= link_to '用户数', admin_schools_path(:sort=> @sort == "desc" ? 'asc' : 'desc', :order => 'num') %>
       </th>
       <th style="width: 90px;">
         创建时间