#排序
sort = request.GET.get('sort','')
if sort:
all_orgs = all_orgs.order_by('-'+sort)
'sort':sort,
<ul class="tab_header">
<li {% if sort == '' %}class="active"{% endif %}><a href="?cityid={{ cityid }}&cate={{ cate }}">全部</a> </li>
<li {% if sort == 'study_num' %}class="active"{% endif %}><a href="?sort=study_num&cityid={{ cityid }}&cate={{ cate }}">学习人数 ↓</a></li>
<li {% if sort == 'course_num' %}class="active"{% endif %}><a href="?sort=course_num&cityid={{ cityid }}&cate={{ cate }}">课程数 ↓</a></li>
</ul>