课程机构首页,如何获取教师的最新课程?
来源：11-2 首页功能开发1
XO鸡丝
2018-01-14
如红框所示.
views.py
#机构首页
class OrgHomeView(View):
def get(self,request,org_id):
current_page = "home"
course_org = CourseOrg.objects.get(id=int(org_id))
# 点击量加1
course_org.click_nums += 1
course_org.save()
all_courses = course_org.course_set.all()[:3]
all_teachers = course_org.teacher_set.all()[:2]
# 判断是否已收藏
has_fav = HasFav(course_org.id,request)
return render(request,'org-detail-homepage.html',{
"all_courses": all_courses,
"all_teachers": all_teachers,
"course_org": course_org,
"current_page": current_page,
"has_fav": has_fav
})org-detail-homepage.html
<div class="right companycenter layout" >
<div class="head">
<h1>机构教师</h1>
<a class="green fr more" href="org-detail-teachers.html">查看更多 > </a>
</div>
{% for teacher in all_teachers %}
<div class="diarys">
<div class="module5 share company-diary-box" style="padding:10px 0;">
<div class="left">
<img class="pic" src="{{ MEDIA_URL }}{{ teacher.image }}"/>
<p>昵称：{{ teacher.name }}</p>
</div>
<div class="right">
<div class="top">
<div class="fl">
<a href=""><h1>JAVA开发 </h1></a>
<span>发表于：2015-10-12</span>
</div>
</div>
<div class="middle" style="border-bottom:0;">课程介绍</div>
</div>
</div>
</div>
{% endfor %}
</div>如果我在想这一页,获取 教师的最新课程( 就是 <h1>JAVA开发</h1> 那一栏) ,应该怎么写好?
现在我的疑问点是 , 教师的显示是通过. {% for teacher in all_teachers %}
如果我 在后端,在给一个变量, ,那这个变量就不好套进 {% for teacher in all_teachers %} 里面了.(实际上是不懂怎么套)
如果仅通过前端, 那应该如何写呢?
写回答
1回答
-
XO鸡丝
提问者
2018-01-14
调整了一下代码,用了过滤器,但是感觉我这样的写法,很不高效,-----每个过滤器都会重新查询一次数据库,不能重用其结果.,很浪费资源.
但是如果不这样,用又因为在 {% for %}里,没有好的方法传输单个变量.
SO,老师那边有什么好的建议吗?
<div class="right companycenter layout" > <div class="head"> <h1>机构教师</h1> <a class="green fr more" href="org-detail-teachers.html">查看更多 > </a> </div> {% for teacher in all_teachers %} <div class="diarys"> <div class="module5 share company-diary-box" style="padding:10px 0;"> <div class="left"> <img class="pic" src="{{ MEDIA_URL }}{{ teacher.image }}"/> <p>昵称：{{ teacher.name }}</p> </div> <div class="right"> <div class="top"> <div class="fl"> <a href=""><h1>{{ teacher.id|get_teacher_new_class }}</h1></a> <span>发表于：{{ teacher.id|get_teacher_new_class_add_time }}</span> </div> </div> <div class="middle" style="border-bottom:0;">{{ teacher.id|get_teacher_new_class_desc }}</div> </div> </div> </div> {% endfor %} </div>organiztions/templatetags/org_filter.py
# -*- coding:utf-8 -*- from django import template register = template.Library() # 根据老师的ID,提取关于这个老师的最新课程 @register.filter def get_teacher_new_class(key): from courses.models import Course new_class = Course.objects.filter(teacher=key).order_by('-add_time')[:1] if new_class.exists(): return new_class[0].name else: return u'暂无课程' @register.filter def get_teacher_new_class_add_time(key): from courses.models import Course new_class = Course.objects.filter(teacher=key).order_by('-add_time')[:1] if new_class.exists(): return new_class[0].add_time else: return u"ヽ(･ω･｡)ﾉ找不到呢...." @register.filter def get_teacher_new_class_desc(key): from courses.models import Course new_class = Course.objects.filter(teacher=key).order_by('-add_time')[:1] if new_class.exists(): return new_class[0].desc else: return u"ヽ(*´Д｀*)ﾉ还是找不到呢...."0102018-08-20
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