Django+xadmin打造在线教育平台（六）

目录

在线教育平台（一）      在线教育平台（二）

在线教育平台（三）      在线教育平台（四）

在线教育平台（五）      在线教育平台（六）

在线教育平台（七）      在线教育平台（八）

在线教育平台（九）      在线教育平台（十）

代码

github下载

教程

学习自慕课网-使用python3.x与Django2.0.1开发的在线教育平台

九、课程章节信息

9.1.模板和urls

 拷贝course-comments.html 和 course-video.html放入 templates目录下

先改course-video.html，同样继承base.html，然后里面有属于自己的样式，也要保留

（1）配置url和视图

　　# 课程章节信息页
    re_path('info/(?P<course_id>d+)/', CourseInfoView.as_view(), name="course_info"),

class CourseInfoView(View):
    '''课程章节信息'''
    def get(self, request, course_id):
        course = Course.objects.get(id=int(course_id))
        return render(request, "course-video.html", {
            "course": course,
        })

（2）配置相关的链接

首先修改course-vedio.html中custom_bread里面的链接

{% block custom_bread %}
    <section>
        <div class="wp">
        <div class="crumbs">
            <ul>
                <li><a href="index.html">首页</a>></li>
                <li><a href="{% url 'course:course_list' %}">公开课程</a>></li>
                <li><a href="{% url 'course:course_detail' course.id %}">课程详情</a>></li>
                <li>章节信息</li>
            </ul>
        </div>
    </div>
    </section>
{% endblock %}

{% extends 'base.html' %}
{% load staticfiles %}
{% block title %}课程列表{% endblock %}

{% block custom_bread %}
    <section>
        <div class="wp">
        <div class="crumbs">
            <ul>
                <li><a href="index.html">首页</a>></li>
                <li><a href="{% url 'course:course_list' %}">公开课程</a>></li>
                <li><a href="{% url 'course:course_detail' course.id %}">公开课程</a>></li>
                <li>课程详情</li>
            </ul>
        </div>
    </div>
    </section>
{% endblock %}

{% block css_learn %}
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/base.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/common-less.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/learn-less.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/common-less.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/mooc.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/aui.css' %}" />
{% endblock %}

{% block content %}
    <div id="main">
    <div class="course-infos">
        <div class="w pr">
            <div style="height: 15px" class="path">
            </div>
            <div class="hd">
                <h2 class="l">django与vuejs实战项目2</h2>
            </div>
            <div class="statics clearfix">
                <div class="static-item ">
                    <span class="meta-value"><strong>高级</strong></span>
                    <span class="meta">难度</span>
                    <em></em>
                </div>
                <div class="static-item static-time">
                    <span class="meta-value">0分钟</span>
                    <span class="meta">时长</span>
                    <em></em>
                </div>
                <div class="static-item">
                    <span class="meta-value"><strong>13</strong></span>
                    <span class="meta">学习人数</span>
                    <em></em>
                </div>
            </div>
        </div>
    </div>
    <div class="course-info-main clearfix w has-progress">

        <div class="info-bar clearfix">
        <div class="content-wrap clearfix">
            <div class="content">
                <div class="mod-tab-menu">
                    <ul class="course-menu clearfix">
                        <li><a class="ui-tabs-active active" id="learnOn"  href="course-video.html"><span>章节</span></a></li>
                        <li><a id="commentOn" class="" href="course-comment.html"><span>评论</span></a></li>
                    </ul>
                </div>
                <div id="notice" class="clearfix">
                    <div class="l"> <strong>课程公告:</strong> <a  href="javascript:void(0)">Spring的文档以及相关的jar文件已上传</a> </div>
                </div>

                <div class="mod-chapters">

                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>第一章 基础知识</strong>
                        </h3>
                        <ul class="video">

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">1.1 hello world (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">1.2 基本概念 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">django settings.py 配置 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                        </ul>
                    </div>

                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>第二章 进阶开发</strong>
                        </h3>
                        <ul class="video">

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">2.1 test (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">2.2 test2 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                        </ul>
                    </div>

                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>第三章 需求分析和数据库设计</strong>
                        </h3>
                        <ul class="video">

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">3.1 django app设计 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">3.2 django model设计 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">3.3 django users models设计 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">3.4 django course models设计 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">3.5 organization models设计 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                        </ul>
                    </div>

                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>第四章 django基础知识回顾</strong>
                        </h3>
                        <ul class="video">

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">4.1 django settings配置 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">4.2 models设计 (20)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                        </ul>
                    </div>

                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>第五章 通过xadmin搭建后台管理系统</strong>
                        </h3>
                        <ul class="video">

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">5.1 django admin讲解 (10)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                            <li>
                                <a target="_blank" href='/video/3662' class="J-media-item studyvideo">5.2 xadmin的安装和注册 (0)
                                    <i class="study-state"></i>
                                </a>
                            </li>

                        </ul>
                    </div>

                </div>

            </div>
            <div class="aside r">
                <div class="bd">

                    <div class="box mb40">
                        <h4>资料下载</h4>
                        <ul class="downlist">

                            <li>
                                <span ><i class="aui-iconfont aui-icon-file"></i>&nbsp;&nbsp;前端页面</span>
                                <a href="../media/course/resource/2016/11/media.zip" class="downcode" target="_blank" download="" data-id="274" title="">下载</a>
                            </li>

                        </ul>
                    </div>
                    <div class="box mb40">
                        <h4>讲师提示</h4>
                        <div class="teacher-info">
                            <a href="/u/315464/courses?sort=publish" target="_blank">
                                <img src='../media/teacher/2016/11/aobama_CXWwMef.png' width='80' height='80' />
                            </a>
        <span class="tit">
          <a href="/u/315464/courses?sort=publish" target="_blank">bobby</a>
        </span>
                            <span class="job">xxx</span>
                        </div>
                        <div class="course-info-tip">
                            <dl class="first">
                                <dt>课程须知</dt>
                                <dd class="autowrap">python基础你需要有</dd>
                            </dl>
                            <dl>
                                <dt>老师告诉你能学到什么？</dt>
                                <dd class="autowrap">django的进阶开发</dd>
                            </dl>
                        </div>
                    </div>


                    <div class="cp-other-learned  js-comp-tabs">
                        <div class="cp-header clearfix">
                            <h2 class="cp-tit l">该课的同学还学过</h2>
                        </div>
                        <div class="cp-body">
                            <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="course" style="display: block">
                                <!-- img 200 x 112 -->
                                <ul class="other-list">

                                    <li class="curr">
                                        <a href="course-detail.html" target="_blank">
                                            <img src="../media/courses/2016/11/540e57300001d6d906000338-240-135_n0L8vbw.jpg" alt="django与vuejs实战项目2">
                                            <span class="name autowrap">django与vuejs实战项目2</span>
                                        </a>
                                    </li>

                                    <li class="curr">
                                        <a href="course-detail.html" target="_blank">
                                            <img src="../media/courses/2016/12/python面向对象.jpg" alt="python面向对象">
                                            <span class="name autowrap">python面向对象</span>
                                        </a>
                                    </li>

                                    <li class="curr">
                                        <a href="course-detail.html" target="_blank">
                                            <img src="../media/courses/2016/12/python文件处理.jpg" alt="python文件处理">
                                            <span class="name autowrap">python文件处理</span>
                                        </a>
                                    </li>

                                    <li class="curr">
                                        <a href="course-detail.html" target="_blank">
                                            <img src="../media/courses/2016/11/mysql.jpg" alt="django入门">
                                            <span class="name autowrap">django入门</span>
                                        </a>
                                    </li>

                                    <li class="curr">
                                        <a href="course-detail.html" target="_blank">
                                            <img src="../media/courses/2016/12/mysql.jpg" alt="xadmin进阶开发">
                                            <span class="name autowrap">xadmin进阶开发</span>
                                        </a>
                                    </li>

                                </ul>
                            </div>
                            <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="plan">
                                <ul class="other-list">
                                    <li class="curr">
                                        <a href="/course/programdetail/pid/31?src=sug" target="_blank">
                                            <img src="http://img.mukewang.com/56551e6700018b0c09600720-240-135.jpg" alt="Java工程师">
                                            <span class="name autowrap">Java工程师</span>
                                        </a>
                                    </li>
                                </ul>
                            </div>
                        </div>
                    </div>

                </div>    </div>
        </div>
        <div class="clear"></div>

    </div>

</div>
</div>
{% endblock %}

然后修改course-detetail.html中点“开始学习”的链接

　　　　　　　　　　　　　　<div class="btns">
                            <div class="btn colectgroupbtn"  id="jsLeftBtn">
                                {% if has_fav_course %}已收藏{% else %}收藏{% endif %}
                            </div>
                                <div class="buy btn"><a style="color: white" href="{% url 'course:course_info' course.id %}">开始学习</a></div>
                        </div>

9.2.章节和视频

（1）给Vedio Model添加一个url字段

url = models.CharField('访问地址',default='',max_length=200)

class Video(models.Model):
    lesson = models.ForeignKey(Lesson, verbose_name="章节",on_delete=models.CASCADE)
    name = models.CharField("视频名",max_length=100)
    url = models.CharField('访问地址',default='',max_length=200)
    add_time = models.DateTimeField("添加时间", default=datetime.now)

    class Meta:
        verbose_name = "视频"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name

在xadmin后台添加课程章节和章节视频信息及链接

python-->>章节-->>视频

（2）给Course添加一个获取章节的方法

    def get_course_lesson(self):
        #获取课程的章节
        return self.lesson_set.all()

class Course(models.Model):
    '''课程'''
    DEGREE_CHOICES = (
        ("cj", "初级"),
        ("zj", "中级"),
        ("gj", "高级")
    )
    name = models.CharField("课程名",max_length=50)
    desc = models.CharField("课程描述",max_length=300)
    detail = models.TextField("课程详情")
    degree = models.CharField('难度',choices=DEGREE_CHOICES, max_length=2)
    learn_times = models.IntegerField("学习时长(分钟数)",default=0)
    students = models.IntegerField("学习人数",default=0)
    fav_nums = models.IntegerField("收藏人数",default=0)
    image = models.ImageField("封面图",upload_to="courses/%Y/%m",max_length=100)
    click_nums = models.IntegerField("点击数",default=0)
    tag = models.CharField('课程标签',default='',max_length=10)
    add_time = models.DateTimeField("添加时间",default=datetime.now,)
    course_org = models.ForeignKey(CourseOrg, on_delete=models.CASCADE, verbose_name="所属机构", null=True, blank=True)
    category = models.CharField("课程类别",max_length=20, default="")

    class Meta:
        verbose_name = "课程"
        verbose_name_plural = verbose_name

    def get_zj_nums(self):
        #获取课程的章节数
        return self.lesson_set.all().count()

    def get_course_lesson(self):
        #获取课程的章节
        return self.lesson_set.all()

    def get_learn_users(self):
        #获取这门课程的学习用户
        return self.usercourse_set.all()[:5]

    def __str__(self):
        return self.name

（3）给Lesson添加一个获取所有视频的方法

    def get_lesson_vedio(self):
        #获取章节所有视频
        return self.video_set.all()

class Lesson(models.Model):
    '''课程章节'''
    course = models.ForeignKey(Course,verbose_name='课程',on_delete=models.CASCADE)
    name = models.CharField("章节名",max_length=100)
    add_time = models.DateTimeField("添加时间",default=datetime.now)

    class Meta:
        verbose_name = "章节"
        verbose_name_plural = verbose_name

    def get_lesson_vedio(self):
        #获取章节所有视频
        return self.video_set.all()

    def __str__(self):
        return '《{0}》课程的章节 >> {1}'.format(self.course, self.name)

（4）给Vedio添加一个学习时长的字段

learn_times = models.IntegerField("学习时长(分钟数)",default=0)

class Video(models.Model):
    '''章节视频'''
    lesson = models.ForeignKey(Lesson, verbose_name="章节",on_delete=models.CASCADE)
    name = models.CharField("视频名",max_length=100)
    url = models.CharField('访问地址',default='',max_length=200)
    learn_times = models.IntegerField("学习时长(分钟数)", default=0)
    add_time = models.DateTimeField("添加时间", default=datetime.now)

    class Meta:
        verbose_name = "视频"
        verbose_name_plural = verbose_name

    def __str__(self):
        return self.name

课程章节和视频

<div class="mod-chapters">
                    {% for lesson in course.get_course_lesson %}
                    <div class="chapter chapter-active" >
                        <h3>
                            <strong><i class="state-expand"></i>{{ lesson.name }}</strong>
                        </h3>
                        <ul class="video">
                            {% for vedio in lesson.get_lesson_vedio %}
                            <li>
                                <a target="_blank" href='{{ vedio.url }}' class="J-media-item studyvideo">{{ vedio.name }} ({{ vedio.learn_times }})
                                    <i class="study-state"></i>
                                </a>
                            </li>
                            {% endfor %}
                        </ul>
                    </div>
                    {% endfor %}
                </div>

9.3.资料下载

 （1）在后端添加资源文件

 

（2）view中把当前课程的课程资源传到前端

class CourseInfoView(View):
    def get(self,request,course_id):
        course = Course.objects.get(id=int(course_id))
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-video.html',{'course':course,'all_resources':all_resources})

（3）前端页面显示

<div class="box mb40">
                        <h4>资料下载</h4>
                        <ul class="downlist">
                            {% for course_resource in all_resources %}
                            <li>
                                <span ><i class="aui-iconfont aui-icon-file"></i>&nbsp;&nbsp;{{ course_resource.name }}</span>
                                <a href="{{ MEDIA_URL }}{{ course_resource.download }}" class="downcode" target="_blank" download="" data-id="274" title="">下载</a>
                            </li>
                            {% endfor %}
                        </ul>
                    </div>

 点下载可以下载我们在后端传上去的文件

 

 把课程的信息也顺便改了

 

 <div class="hd">
                <h2 class="l">{{ course.name }}</h2>
            </div>
            <div class="statics clearfix">
                <div class="static-item ">
                    <span class="meta-value"><strong>{{ course.get_degree_display }}</strong></span>
                    <span class="meta">难度</span>
                    <em></em>
                </div>
                <div class="static-item static-time">
                    <span class="meta-value">{{ course.learn_times }}分钟</span>
                    <span class="meta">时长</span>
                    <em></em>
                </div>
                <div class="static-item">
                    <span class="meta-value"><strong>{{ course.students }}</strong></span>
                    <span class="meta">学习人数</span>
                    <em></em>
                </div>
            </div>

9.4.讲师提示

（1）给Course添加一个teacher外键

teacher = models.ForeignKey(Teacher,verbose_name='讲师',null=True,blank=True,on_delete=models.CASCADE)

class Course(models.Model):
    '''课程'''
    DEGREE_CHOICES = (
        ("cj", "初级"),
        ("zj", "中级"),
        ("gj", "高级")
    )
    name = models.CharField("课程名",max_length=50)
    desc = models.CharField("课程描述",max_length=300)
    detail = models.TextField("课程详情")
    degree = models.CharField('难度',choices=DEGREE_CHOICES, max_length=2)
    learn_times = models.IntegerField("学习时长(分钟数)",default=0)
    students = models.IntegerField("学习人数",default=0)
    fav_nums = models.IntegerField("收藏人数",default=0)
    image = models.ImageField("封面图",upload_to="courses/%Y/%m",max_length=100)
    click_nums = models.IntegerField("点击数",default=0)
    tag = models.CharField('课程标签',default='',max_length=10)
    add_time = models.DateTimeField("添加时间",default=datetime.now,)
    course_org = models.ForeignKey(CourseOrg, on_delete=models.CASCADE, verbose_name="所属机构", null=True, blank=True)
    category = models.CharField("课程类别",max_length=20, default="")
    teacher = models.ForeignKey(Teacher,verbose_name='讲师',null=True,blank=True,on_delete=models.CASCADE)

    class Meta:
        verbose_name = "课程"
        verbose_name_plural = verbose_name

    def get_zj_nums(self):
        #获取课程的章节数
        return self.lesson_set.all().count()

    def get_course_lesson(self):
        #获取课程所有章节
        return self.lesson_set.all()

    def get_learn_users(self):
        #获取这门课程的学习用户
        return self.usercourse_set.all()[:5]

    def __str__(self):
        return self.name

在后台为课程添加一个讲师

（2）给Course再添加两个字段 “课程须知”和“老师告诉你能学到什么”

youneed_know = models.CharField('课程须知',max_length=300,default='')
teacher_tell = models.CharField('老师告诉你',max_length=300,default='')

class Course(models.Model):
    '''课程'''
    DEGREE_CHOICES = (
        ("cj", "初级"),
        ("zj", "中级"),
        ("gj", "高级")
    )
    name = models.CharField("课程名",max_length=50)
    desc = models.CharField("课程描述",max_length=300)
    detail = models.TextField("课程详情")
    degree = models.CharField('难度',choices=DEGREE_CHOICES, max_length=2)
    learn_times = models.IntegerField("学习时长(分钟数)",default=0)
    students = models.IntegerField("学习人数",default=0)
    fav_nums = models.IntegerField("收藏人数",default=0)
    image = models.ImageField("封面图",upload_to="courses/%Y/%m",max_length=100)
    click_nums = models.IntegerField("点击数",default=0)
    tag = models.CharField('课程标签',default='',max_length=10)
    add_time = models.DateTimeField("添加时间",default=datetime.now,)
    course_org = models.ForeignKey(CourseOrg, on_delete=models.CASCADE, verbose_name="所属机构", null=True, blank=True)
    category = models.CharField("课程类别",max_length=20, default="")
    teacher = models.ForeignKey(Teacher,verbose_name='讲师',null=True,blank=True,on_delete=models.CASCADE)
    youneed_know = models.CharField('课程须知',max_length=300,default='')
    teacher_tell = models.CharField('老师告诉你',max_length=300,default='')

    class Meta:
        verbose_name = "课程"
        verbose_name_plural = verbose_name

    def get_zj_nums(self):
        #获取课程的章节数
        return self.lesson_set.all().count()

    def get_course_lesson(self):
        #获取课程所有章节
        return self.lesson_set.all()

    def get_learn_users(self):
        #获取这门课程的学习用户
        return self.usercourse_set.all()[:5]

    def __str__(self):
        return self.name

（3）前端显示

<div class="box mb40">
                        <h4>讲师提示</h4>
                        <div class="teacher-info">
                            <a href="/u/315464/courses?sort=publish" target="_blank">
                                <img src='{{ MEDIA_URL }}{{ course.teacher.image }}' width='80' height='80' />
                            </a>
        <span class="tit">
          <a href="/u/315464/courses?sort=publish" target="_blank">{{ course.teacher.name }}</a>
        </span>
                            <span class="job">{{ course.teacher.work_position }}</span>
                        </div>
                        <div class="course-info-tip">
                            <dl class="first">
                                <dt>课程须知</dt>
                                <dd class="autowrap">{{ course.youneed_know }}</dd>
                            </dl>
                            <dl>
                                <dt>老师告诉你能学到什么？</dt>
                                <dd class="autowrap">{{ course.teacher_tell }}</dd>
                            </dl>
                        </div>
                    </div>

9.5.课程评论

 （1）course-comments.html照样继承base.html

{% extends 'base.html' %}
{% load staticfiles %}
{% block title %}公开课评论{% endblock %}

{% block custom_bread %}
    <section>
        <div class="wp">
        <div class="crumbs">
            <ul>
                <li><a href="index.html">首页</a>></li>
                <li><a href="{% url 'course:course_list' %}">公开课程</a>></li>
                <li><a href="{% url 'course:course_detail' course.id %}">公开课程</a>></li>
                <li>课程评论</li>
            </ul>
        </div>
    </div>
    </section>
{% endblock %}

{% block custom_css %}
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/learn-less.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/course-comment.css' %}" />
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/base.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/common-less.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/common-less.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/mooc.css' %}" />
{% endblock %}

{% block content %}
    <div id="main">
    <div class="course-infos">
        <div class="w pr">
            <div style="height: 15px" class="path">
            </div>
            <div class="hd">
                <h2 class="l">django与vuejs实战项目2</h2>
            </div>
            <div class="statics clearfix">
                <div class="static-item ">
                    <span class="meta-value"><strong>高级</strong></span>
                    <span class="meta">难度</span>
                    <em></em>
                </div>
                <div class="static-item static-time">
                    <span class="meta-value">0分钟</span>
                    <span class="meta">时长</span>
                    <em></em>
                </div>
                <div class="static-item">
                    <span class="meta-value"><strong>12</strong></span>
                    <span class="meta">学习人数</span>
                    <em></em>
                </div>
            </div>
        </div>
    </div>
    <div class="course-info-main clearfix w has-progress">

        <div class="info-bar clearfix">
            <div class="content-wrap clearfix">
                <div class="content">
                    <div class="mod-tab-menu">
                        <ul class="course-menu clearfix">
                            <li><a class="ui-tabs-active " id="learnOn"  href="course-video.html"><span>章节</span></a></li>
                            <li><a id="commentOn" class="active" href="course-comment.html"><span>评论</span></a></li>
                        </ul>
                    </div>

                    <!--发布评论-->
                    <div id="js-pub-container" class="issques clearfix js-form">
                        <div class="wgt-ipt-wrap pub-editor-wrap " id="js-pl-input-fake">
                            <textarea id="js-pl-textarea" class="" placeholder="扯淡、吐槽、表扬、鼓励……想说啥就说啥！" ></textarea>
                        </div>
                        <input type="button" id="js-pl-submit" class="pub-btn" data-cid="452" value="发表评论">
                        <p class="global-errortip js-global-error"></p>
                    </div>
                    <div id="course_note">
                        <ul class="mod-post" id="comment-list">

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">看到第三章了，虽然有些知识还不是听得很懂，但是感觉很有用的样子，想的是先听完一遍再说。然后再来听第二遍。最后想说老师棒棒哒！！！</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月13日 22:14</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">老师您讲的很好，很期待下次的课程。我有个小问题，jedi我用git clone 和 apt-get 都装上了，:help jedi-vim ,提示我E149: 抱歉，没有 jedi-vim 的说明，补全也不能用，有点搞不清楚了。我安装vim插件python-mode也不能用...</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月13日 22:13</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">你好。我在看7.3节 关于使用上下文管理的那个例子。关于telnetlib库使用的一些问题。 Telnet.read_until(expected, timeout=None) ;使用这个方法容易卡在输入登陆用户名的位置就不执行了。假如telnet到目标主机，如果提示符不是login ，就无法登陆吗？</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月13日 22:13</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">精品，老早就听医生的课了，这次的课程又让我长见识了，就像别的同学说的那样，如此简洁的实现酷炫动画的方式让我激动，赶快学完视频内容好去实现那10个任务，到时候希望徐大神好好指导指导我，如果学完后能给我个行业推荐啥的就更好了，明年就开始实习了！老紧张了--</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月13日 22:12</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">测试一下</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月13日 22:11</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">好</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月8日 22:07</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">好</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月8日 22:07</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">好</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年12月8日 22:06</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">再来一次</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年11月5日 23:18</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">good </p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年11月5日 23:18</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">讲的很不错</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年11月5日 23:13</span>
                                    </div>
                                </div>
                            </li>

                            <li class="post-row">
                                <div class="media">
                                    <span target="_blank"><img src='../media/image/2016/12/default_big_14.png' width='40' height='40' /></span>
                                </div>
                                <div class="bd">
                                    <div class="tit">
                                        <span target="_blank">bobby</span>
                                    </div>
                                    <p class="cnt">给问问</p>
                                    <div class="footer clearfix">
                                        <span title="创建时间" class="l timeago">时间：2016年11月5日 23:09</span>
                                    </div>
                                </div>
                            </li>

                        </ul>
                    </div>

                </div>
                <div class="aside r">
                    <div class="bd">

                        <div class="box mb40">
                        <h4>资料下载</h4>
                        <ul class="downlist">

                            <li>
                                <span ><i class="aui-iconfont aui-icon-file"></i>&nbsp;&nbsp;前端页面</span>
                                <a href="../media/course/resource/2016/11/media.zip" class="downcode" target="_blank" download="" data-id="274" title="">下载</a>
                            </li>

                        </ul>
                    </div>
                        <div class="box mb40">
                        <h4>讲师提示</h4>
                        <div class="teacher-info">
                            <a href="/u/315464/courses?sort=publish" target="_blank">
                                <img src='../media/teacher/2016/11/aobama_CXWwMef.png' width='80' height='80' />
                            </a>
        <span class="tit">
          <a href="/u/315464/courses?sort=publish" target="_blank">bobby</a>
        </span>
                            <span class="job">xxx</span>
                        </div>
                        <div class="course-info-tip">
                            <dl class="first">
                                <dt>课程须知</dt>
                                <dd class="autowrap">python基础你需要有</dd>
                            </dl>
                            <dl>
                                <dt>老师告诉你能学到什么？</dt>
                                <dd class="autowrap">django的进阶开发</dd>
                            </dl>
                        </div>
                    </div>


                        <div class="cp-other-learned  js-comp-tabs">
                            <div class="cp-header clearfix">
                                <h2 class="cp-tit l">该课的同学还学过</h2>
                            </div>
                            <div class="cp-body">
                                <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="course" style="display: block">
                                    <!-- img 200 x 112 -->
                                    <ul class="other-list">
                                        <li class="curr">
                                            <a href="/view/85?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/57035ff200014b8a06000338-240-135.jpg" alt="Java入门第一季">
                                                <span class="name autowrap">Java入门第一季</span>
                                            </a>
                                        </li>
                                        <li>
                                            <a href="/view/110?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/5703604a0001694406000338-240-135.jpg" alt="Java入门第三季">
                                                <span class="name autowrap">Java入门第三季</span>
                                            </a>
                                        </li>
                                        <li>
                                            <a href="/view/124?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/570360620001390f06000338-240-135.jpg" alt="Java入门第二季">
                                                <span class="name autowrap">Java入门第二季</span>
                                            </a>
                                        </li>
                                        <li>
                                            <a href="/view/47?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/570765d90001bf1406000338-240-135.jpg" alt="Spring MVC起步">
                                                <span class="name autowrap">Spring MVC起步</span>
                                            </a>
                                        </li>
                                        <li>
                                            <a href="/view/36?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/53e1d0470001ad1e06000338-240-135.jpg" alt="JavaScript入门篇">
                                                <span class="name autowrap">JavaScript入门篇</span>
                                            </a>
                                        </li>
                                    </ul>
                                </div>
                                <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="plan">
                                    <ul class="other-list">
                                        <li class="curr">
                                            <a href="/course/programdetail/pid/31?src=sug" target="_blank">
                                                <img src="http://img.mukewang.com/56551e6700018b0c09600720-240-135.jpg" alt="Java工程师">
                                                <span class="name autowrap">Java工程师</span>
                                            </a>
                                        </li>
                                    </ul>
                                </div>
                            </div>
                        </div>

                    </div>    </div>
            </div>
            <div class="clear"></div>

        </div>

    </div>
</div>
{% endblock %}

（2）url和视图

#课程评论
    re_path('comment/(?P<course_id>d+)/', CommentsView.as_view(), name="course_comments"),

class CommentsView(View):
    '''课程评论'''
    def get(self, request, course_id):
        course = Course.objects.get(id=int(course_id))
        all_resources = CourseResource.objects.filter(course=course)
        all_comments = CourseComments.objects.all()
        return render(request, "course-comment.html", {
            "course": course,
            "all_resources": all_resources,
            'all_comments':all_comments,
        })

（3）添加链接

在course-vedio.html中修改 “章节”和“评论”的链接

<div class="mod-tab-menu">
                    <ul class="course-menu clearfix">
                        <li><a class="ui-tabs-active active" id="learnOn"  href="{% url 'course:course_info' course.id %}"><span>章节</span></a></li>
                        <li><a id="commentOn" class="" href="{% url 'course:course_comments' course.id %}"><span>评论</span></a></li>
                    </ul>
                </div>

然后把评论页跟章节页的相同（‘课程’，‘资料下载’，‘讲师提示’）的地方直接果汁过来

（4）添加评论

添加评论的url和后台处理View

#添加评论
    path('add_comment/', AddCommentsView.as_view(), name="add_comment"),

#添加评论
class AddCommentsView(View):
    '''用户评论'''
    def post(self, request):
        if not request.user.is_authenticated:
            # 未登录时返回json提示未登录，跳转到登录页面是在ajax中做的
            return HttpResponse('{"status":"fail", "msg":"用户未登录"}', content_type='application/json')
        course_id = request.POST.get("course_id", 0)
        comments = request.POST.get("comments", "")
        if int(course_id) > 0 and comments:
            # 实例化一个course_comments对象
            course_comments = CourseComments()
            # 获取评论的是哪门课程
            course = Course.objects.get(id = int(course_id))
            # 分别把评论的课程、评论的内容和评论的用户保存到数据库
            course_comments.course = course
            course_comments.comments = comments
            course_comments.user = request.user
            course_comments.save()
            return HttpResponse('{"status":"success", "msg":"评论成功"}', content_type='application/json')
        else:
            return HttpResponse('{"status":"fail", "msg":"评论失败"}', content_type='application/json')

前端Ajax添加用户的评论

{% block custom_js %}
    <script type="text/javascript">
    //添加评论
    $('#js-pl-submit').on('click', function(){
        var comments = $("#js-pl-textarea").val()
        if(comments == ""){
            alert("评论不能为空")
            return
        }
        $.ajax({
            cache: false,
            type: "POST",
            url:"{% url 'course:add_comment' %}",
            data:{'course_id':{{ course.id }}, 'comments':comments},
            async: true,
            beforeSend:function(xhr, settings){
                xhr.setRequestHeader("X-CSRFToken", "{{ csrf_token }}");
            },
            success: function(data) {
                if(data.status == 'fail'){
                    if(data.msg == '用户未登录'){
                        window.location.href="/login/";
                    }else{
                        alert(data.msg)
                    }

                }else if(data.status == 'success'){
                    window.location.reload();//刷新当前页面.
                }
            },
        });
    });

</script>
{% endblock %}

 显示评论的信息

<div id="course_note">
                            <ul class="mod-post" id="comment-list">
                                {% for user_comment in all_comments %}
                                    <li class="post-row">
                                        <div class="media">
                                        <span target="_blank"><img src='{{ MEDIA_URL }}{{ user_comment.user.image }}'
                                                                   width='40' height='40'/></span>
                                        </div>
                                        <div class="bd">
                                            <div class="tit">
                                                <span target="_blank">{{ user_comment.user.username }}</span>
                                            </div>
                                            <p class="cnt">
                                                {{ user_comment.comments }}
                                            <div class="footer clearfix">
                                                <span title="创建时间"
                                                      class="l timeago">时间：{{ user_comment.add_time }}</span>
                                            </div>
                                        </div>
                                    </li>
                                {% endfor %}


                            </ul>
                        </div>

{% extends 'base.html' %}
{% load staticfiles %}
{% block title %}公开课评论{% endblock %}

{% block custom_bread %}
    <section>
        <div class="wp">
            <div class="crumbs">
                <ul>
                    <li><a href="index.html">首页</a>></li>
                    <li><a href="{% url 'course:course_list' %}">公开课程</a>></li>
                    <li><a href="{% url 'course:course_detail' course.id %}">公开课程</a>></li>
                    <li>课程评论</li>
                </ul>
            </div>
        </div>
    </section>
{% endblock %}

{% block custom_css %}
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/learn-less.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/course-comment.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/base.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/common-less.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/common-less.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/mooc.css' %}"/>
{% endblock %}

{% block content %}

    <div id="main">
        <div class="course-infos">
            <div class="w pr">
                <div style="height: 15px" class="path">
                </div>
                <div class="hd">
                    <h2 class="l">{{ course.name }}</h2>
                </div>
                <div class="statics clearfix">
                    <div class="static-item ">
                        <span class="meta-value"><strong>{{ course.get_degree_display }}</strong></span>
                        <span class="meta">难度</span>
                        <em></em>
                    </div>
                    <div class="static-item static-time">
                        <span class="meta-value">{{ course.learn_times }}分钟</span>
                        <span class="meta">时长</span>
                        <em></em>
                    </div>
                    <div class="static-item">
                        <span class="meta-value"><strong>{{ course.students }}</strong></span>
                        <span class="meta">学习人数</span>
                        <em></em>
                    </div>
                </div>
            </div>
        </div>
        <div class="course-info-main clearfix w has-progress">

            <div class="info-bar clearfix">
                <div class="content-wrap clearfix">
                    <div class="content">
                        <div class="mod-tab-menu">
                            <ul class="course-menu clearfix">
                                <li><a class="ui-tabs-active active" id="learnOn"
                                       href="{% url 'course:course_info' course.id %}"><span>章节</span></a></li>
                                <li><a id="commentOn" class=""
                                       href="{% url 'course:course_comments' course.id %}"><span>评论</span></a></li>
                            </ul>
                        </div>

                        <!--发布评论-->
                        <div id="js-pub-container" class="issques clearfix js-form">
                            <div class="wgt-ipt-wrap pub-editor-wrap " id="js-pl-input-fake">
                                <textarea id="js-pl-textarea" class="" placeholder="来说点啥呗！！！"></textarea>
                            </div>
                            <input type="button" id="js-pl-submit" class="pub-btn" data-cid="452" value="发表评论">
                            <p class="global-errortip js-global-error"></p>
                        </div>
                        <div id="course_note">
                            <ul class="mod-post" id="comment-list">
                                {% for user_comment in all_comments %}
                                    <li class="post-row">
                                        <div class="media">
                                        <span target="_blank"><img src='{{ MEDIA_URL }}{{ user_comment.user.image }}'
                                                                   width='40' height='40'/></span>
                                        </div>
                                        <div class="bd">
                                            <div class="tit">
                                                <span target="_blank">{{ user_comment.user.username }}</span>
                                            </div>
                                            <p class="cnt">
                                                {{ user_comment.comments }}
                                            <div class="footer clearfix">
                                                <span title="创建时间"
                                                      class="l timeago">时间：{{ user_comment.add_time }}</span>
                                            </div>
                                        </div>
                                    </li>
                                {% endfor %}


                            </ul>
                        </div>

                    </div>

                    <div class="aside r">
                        <div class="bd">

                            <div class="box mb40">
                                <h4>资料下载</h4>
                                <ul class="downlist">
                                    {% for course_resource in all_resources %}
                                        <li>
                                            <span><i
                                                    class="aui-iconfont aui-icon-file"></i>&nbsp;&nbsp;{{ course_resource.name }}</span>
                                            <a href="{{ MEDIA_URL }}{{ course_resource.download }}" class="downcode"
                                               target="_blank" download="" data-id="274" title="">下载</a>
                                        </li>
                                    {% endfor %}
                                </ul>
                            </div>

                            <div class="box mb40">
                                <h4>讲师提示</h4>
                                <div class="teacher-info">
                                    <a href="/u/315464/courses?sort=publish" target="_blank">
                                        <img src='{{ MEDIA_URL }}{{ course.teacher.image }}' width='80' height='80'/>
                                    </a>
                                    <span class="tit">
          <a href="/u/315464/courses?sort=publish" target="_blank">{{ course.teacher.name }}</a>
        </span>
                                    <span class="job">{{ course.teacher.work_position }}</span>
                                </div>
                                <div class="course-info-tip">
                                    <dl class="first">
                                        <dt>课程须知</dt>
                                        <dd class="autowrap">{{ course.youneed_know }}</dd>
                                    </dl>
                                    <dl>
                                        <dt>老师告诉你能学到什么？</dt>
                                        <dd class="autowrap">{{ course.teacher_tell }}</dd>
                                    </dl>
                                </div>
                            </div>


                            <div class="cp-other-learned  js-comp-tabs">
                                <div class="cp-header clearfix">
                                    <h2 class="cp-tit l">该课的同学还学过</h2>
                                </div>
                                <div class="cp-body">
                                    <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="course"
                                         style="display: block">
                                        <!-- img 200 x 112 -->
                                        <ul class="other-list">
                                            <li class="curr">
                                                <a href="/view/85?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/57035ff200014b8a06000338-240-135.jpg"
                                                         alt="Java入门第一季">
                                                    <span class="name autowrap">Java入门第一季</span>
                                                </a>
                                            </li>
                                            <li>
                                                <a href="/view/110?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/5703604a0001694406000338-240-135.jpg"
                                                         alt="Java入门第三季">
                                                    <span class="name autowrap">Java入门第三季</span>
                                                </a>
                                            </li>
                                            <li>
                                                <a href="/view/124?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/570360620001390f06000338-240-135.jpg"
                                                         alt="Java入门第二季">
                                                    <span class="name autowrap">Java入门第二季</span>
                                                </a>
                                            </li>
                                            <li>
                                                <a href="/view/47?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/570765d90001bf1406000338-240-135.jpg"
                                                         alt="Spring MVC起步">
                                                    <span class="name autowrap">Spring MVC起步</span>
                                                </a>
                                            </li>
                                            <li>
                                                <a href="/view/36?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/53e1d0470001ad1e06000338-240-135.jpg"
                                                         alt="JavaScript入门篇">
                                                    <span class="name autowrap">JavaScript入门篇</span>
                                                </a>
                                            </li>
                                        </ul>
                                    </div>
                                    <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="plan">
                                        <ul class="other-list">
                                            <li class="curr">
                                                <a href="/course/programdetail/pid/31?src=sug" target="_blank">
                                                    <img src="http://img.mukewang.com/56551e6700018b0c09600720-240-135.jpg"
                                                         alt="Java工程师">
                                                    <span class="name autowrap">Java工程师</span>
                                                </a>
                                            </li>
                                        </ul>
                                    </div>
                                </div>
                            </div>

                        </div>
                    </div>
                </div>
                <div class="clear"></div>

            </div>

        </div>
    </div>
{% endblock %}

{% block custom_js %}
    <script type="text/javascript">
    //添加评论
    $('#js-pl-submit').on('click', function(){
        var comments = $("#js-pl-textarea").val()
        if(comments == ""){
            alert("评论不能为空")
            return
        }
        $.ajax({
            cache: false,
            type: "POST",
            url:"{% url 'course:add_comment' %}",
            data:{'course_id':{{ course.id }}, 'comments':comments},
            async: true,
            beforeSend:function(xhr, settings){
                xhr.setRequestHeader("X-CSRFToken", "{{ csrf_token }}");
            },
            success: function(data) {
                if(data.status == 'fail'){
                    if(data.msg == '用户未登录'){
                        window.location.href="/login/";
                    }else{
                        alert(data.msg)
                    }

                }else if(data.status == 'success'){
                    window.location.reload();//刷新当前页面.
                }
            },
        });
    });

</script>
{% endblock %}

 9.6.相关课程推荐

(1)view

#相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

class CourseInfoView(View):
    '''课程章节信息'''
    def get(self,request,course_id):
        course = Course.objects.get(id=int(course_id))
        #相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

        # 资源
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-video.html',{
            'course':course,
            'all_resources':all_resources,
            'relate_courses':relate_courses,
        })

(2)前端  coure-vedio.html

<div class="cp-other-learned  js-comp-tabs">
                        <div class="cp-header clearfix">
                            <h2 class="cp-tit l">该课的同学还学过</h2>
                        </div>
                        <div class="cp-body">
                            <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="course" style="display: block">
                                <!-- img 200 x 112 -->
                                <ul class="other-list">
                                    {% for relate_course in relate_courses %}
                                    <li class="curr">
                                        <a href="{% url 'course:course_detail' relate_course.id %}" target="_blank">
                                            <img src="{{ MEDIA_URL }}{{ relate_course.image }}" alt="{{ relate_course.name }}">
                                            <span class="name autowrap">{{ relate_course.name }}</span>
                                        </a>
                                    </li>
                                    {% endfor %}

                                </ul>
                            </div>

                        </div>
                    </div>

 9.7.把课程与用户关联起来

当用户点了“开始学习”之后，应该把这门课程与用户关联起来，在这之前应该需要做个判断，如果没有登录，则让用户先登录才可以。

如果是用函数方式写的话直接加个装饰器（@login_required）就可以，但是我们是用类的方式写的，必须用继承的方式

在utils目录下创建文件  mixin_utils.py（最基本的类都放在mixin_utils.py里面），代码如下：

# apps/utils/mixin_utils.py

from django.contrib.auth.decorators import login_required
from django.utils.decorators import method_decorator

class LoginRequiredMixin(object):
    @method_decorator(login_required(login_url='/login/'))   
    def dispatch(self,request,*args,**kwargs):
        return super(LoginRequiredMixin, self).dispatch(request,*args,**kwargs)

在django中已Mixin结尾的，就代表最基本的View

然后让CourseInfoView和CommentsView都继承LoginRequiredMixin

class CommentsView(LoginRequiredMixin,View):
.
.
.

class CourseInfoView(LoginRequiredMixin,View):
.
.
.

 继承后，没有登录的用户点“开始学习”，自动跳到login界面

把用户与课程关联起来

# 查询用户是否已经学习了该课程
        user_courses = UserCourse.objects.filter(user=request.user,course=course)
        if not user_courses:
            # 如果没有学习该门课程就关联起来
            user_course = UserCourse(user=request.user,course=course)
            user_course.save()

全部代码：

class CourseInfoView(LoginRequiredMixin,View):
    '''课程章节信息'''
    def get(self,request,course_id):
        course = Course.objects.get(id=int(course_id))

        # 查询用户是否已经学习了该课程
        user_courses = UserCourse.objects.filter(user=request.user,course=course)
        if not user_courses:
            # 如果没有学习该门课程就关联起来
            user_course = UserCourse(user=request.user,course=course)
            user_course.save()

        #相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

        # 资源
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-video.html',{
            'course':course,
            'all_resources':all_resources,
            'relate_courses':relate_courses,
        })

 现在你点“开始学习”其它课程后，在“该课的同学好学过”下面能看到，说明没问题

9.8.视频播放页面

（1）把course-paly.html拷贝到templates目录下

主要不同的是css和一个vedio div

下载video-js.min.css和video.min.js分别放到css和js目录下

（2）url

# 课程视频播放页
    path('video/(?P<video_id>d+)/', VideoPlayView.as_view(), name="video_play"),

（3）修改course-video.html中video的链接

　　　　　　　　　　　　　　　　　　<li>
                                <a target="_blank" href='{% url 'course:video_play' vedio.id %}' class="J-media-item studyvideo">{{ vedio.name }} ({{ vedio.learn_times }})
                                    <i class="study-state"></i>
                                </a>
                            </li>

（4）view

class VideoPlayView(LoginRequiredMixin, View):
    '''课程章节视频播放页面'''
    def get(self,request,video_id):
        video = Video.objects.get(id=int(video_id))
        #通过外键找到章节再找到视频对应的课程
        course = video.lesson.course

        course.students += 1
        course.save()

        # 查询用户是否已经学习了该课程
        user_courses = UserCourse.objects.filter(user=request.user,course=course)
        if not user_courses:
            # 如果没有学习该门课程就关联起来
            user_course = UserCourse(user=request.user,course=course)
            user_course.save()

        #相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

        # 资源
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-play.html',{
            'course':course,
            'all_resources':all_resources,
            'relate_courses':relate_courses,
            'video':video,
        })

# course/views.py

from django.shortcuts import render
from django.views.generic import View
from .models import Course,CourseResource,Video
from operation.models import UserFavorite,CourseComments,UserCourse
from pure_pagination import Paginator, EmptyPage, PageNotAnInteger
from django.http import HttpResponse
from utils.mixin_utils import LoginRequiredMixin


class CourseListView(View):
    '''课程列表'''
    def get(self, request):
        all_courses = Course.objects.all().order_by('-add_time')
        # 热门课程推荐
        hot_courses = Course.objects.all().order_by('-click_nums')[:3]
        # 排序
        sort = request.GET.get('sort', "")
        if sort:
            if sort == "students":
                all_courses = all_courses.order_by("-students")
            elif sort == "hot":
                all_courses = all_courses.order_by("-click_nums")
        # 分页
        try:
            page = request.GET.get('page', 1)
        except PageNotAnInteger:
            page = 1
        p = Paginator(all_courses,2 , request=request)
        courses = p.page(page)
        return render(request, "course-list.html", {
            "all_courses":courses,
            'sort': sort,
            'hot_courses':hot_courses,

        })


class CourseDetailView(View):
    '''课程详情'''
    def get(self, request, course_id):
        course = Course.objects.get(id=int(course_id))
        # 课程的点击数加1
        course.click_nums += 1
        course.save()
        # 课程标签
        # 通过当前标签，查找数据库中的课程
        has_fav_course = False
        has_fav_org = False

        # 必须是用户已登录我们才需要判断。
        if request.user.is_authenticated:
            if UserFavorite.objects.filter(user=request.user, fav_id=course.id, fav_type=1):
                has_fav_course = True
            if UserFavorite.objects.filter(user=request.user, fav_id=course.course_org.id, fav_type=2):
                has_fav_org = True
        tag = course.tag
        if tag:
            # 需要从1开始不然会推荐自己
            relate_courses = Course.objects.filter(tag=tag)[:2]
        else:
            relate_courses = []
        return  render(request, "course-detail.html", {
            'course':course,
            'relate_courses':relate_courses,
            "has_fav_course": has_fav_course,
            "has_fav_org": has_fav_org,
        })


class CourseInfoView(LoginRequiredMixin,View):
    '''课程章节信息'''
    def get(self,request,course_id):
        course = Course.objects.get(id=int(course_id))
        course.students += 1
        course.save()
        # 查询用户是否已经学习了该课程
        user_courses = UserCourse.objects.filter(user=request.user,course=course)
        if not user_courses:
            # 如果没有学习该门课程就关联起来
            user_course = UserCourse(user=request.user,course=course)
            user_course.save()

        #相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

        # 资源
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-video.html',{
            'course':course,
            'all_resources':all_resources,
            'relate_courses':relate_courses,
        })


class CommentsView(LoginRequiredMixin,View):
    '''课程评论'''
    def get(self, request, course_id):
        course = Course.objects.get(id=int(course_id))
        all_resources = CourseResource.objects.filter(course=course)
        all_comments = CourseComments.objects.all()
        return render(request, "course-comment.html", {
            "course": course,
            "all_resources": all_resources,
            'all_comments':all_comments,
        })


#添加评论
class AddCommentsView(View):
    '''用户评论'''
    def post(self, request):
        if not request.user.is_authenticated:
            # 未登录时返回json提示未登录，跳转到登录页面是在ajax中做的
            return HttpResponse('{"status":"fail", "msg":"用户未登录"}', content_type='application/json')
        course_id = request.POST.get("course_id", 0)
        comments = request.POST.get("comments", "")
        if int(course_id) > 0 and comments:
            # 实例化一个course_comments对象
            course_comments = CourseComments()
            # 获取评论的是哪门课程
            course = Course.objects.get(id = int(course_id))
            # 分别把评论的课程、评论的内容和评论的用户保存到数据库
            course_comments.course = course
            course_comments.comments = comments
            course_comments.user = request.user
            course_comments.save()
            return HttpResponse('{"status":"success", "msg":"评论成功"}', content_type='application/json')
        else:
            return HttpResponse('{"status":"fail", "msg":"评论失败"}', content_type='application/json')


class VideoPlayView(LoginRequiredMixin, View):
    '''课程章节视频播放页面'''
    def get(self,request,video_id):
        video = Video.objects.get(id=int(video_id))
        #通过外键找到章节再找到视频对应的课程
        course = video.lesson.course

        course.students += 1
        course.save()

        # 查询用户是否已经学习了该课程
        user_courses = UserCourse.objects.filter(user=request.user,course=course)
        if not user_courses:
            # 如果没有学习该门课程就关联起来
            user_course = UserCourse(user=request.user,course=course)
            user_course.save()

        #相关课程推荐
        # 找到学习这门课的所有用户
        user_courses = UserCourse.objects.filter(course=course)
        # 找到学习这门课的所有用户的id
        user_ids = [user_course.user_id for user_course in user_courses]
        # 通过所有用户的id,找到所有用户学习过的所有过程
        all_user_courses = UserCourse.objects.filter(user_id__in=user_ids)
        # 取出所有课程id
        course_ids = [all_user_course.course_id for all_user_course in all_user_courses]
        # 通过所有课程的id,找到所有的课程，按点击量去五个
        relate_courses = Course.objects.filter(id__in=course_ids).order_by("-click_nums")[:5]

        # 资源
        all_resources = CourseResource.objects.filter(course=course)
        return render(request,'course-play.html',{
            'course':course,
            'all_resources':all_resources,
            'relate_courses':relate_courses,
            'video':video,
        })

{% extends 'base.html' %}

{% block titile %}
    {{ video.name }} 在线网
{% endblock %}

{% load staticfiles %}
<!--crumbs start-->
{% block custom_bread %}
    <section>
        <div class="wp">
            <div class="crumbs">
                <ul>
                    <li><a href="{% url 'index' %}">首页</a>></li>
                    <li><a href="{% url 'course:course_list' %}">公开课程</a>></li>
                    <li><a href="{% url 'course:course_detail' course.id %}">{{ course.name }}</a>></li>
                    <li></li>
                </ul>
            </div>
        </div>
    </section>
{% endblock %}

{% block custom_css %}
    <link rel="stylesheet" type="text/css" href="{% static 'css/video-js.min.css' %}">
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/base.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/common-less.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/learn-less.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/mooc.css' %}"/>
    <link rel="stylesheet" type="text/css" href="{% static 'css/muke/course/common-less.css' %}">
    <style>
        .video-js .vjs-big-play-button {
            top: 50%;
            left: 50%;
        }
    </style>
{% endblock %}

{% block custom_js %}
    <script src="{% static 'js/video.min.js' %}" type="text/javascript"></script>
{% endblock %}

{% block content %}
    <div id="main">

        <div class="course-info-main clearfix w has-progress">
            <div style="1200px;height: 650px; margin-left:100px">
                <video id="example_video_1" class="video-js vjs-default-skin" controls preload="none" width="1200"
                       poster="http://video-js.zencoder.com/oceans-clip.png"
                       data-setup="" type="video/mp4">
                    <source src="{{ video.url }}">
                </video>
            </div>
            <div class="info-bar clearfix">
                <div class="content-wrap clearfix">
                    <div class="content">
                        <div class="mod-tab-menu">
                            <ul class="course-menu clearfix">
                                <li><a class="ui-tabs-active active" id="learnOn"
                                       href="{% url 'course:course_info' course.id %}"><span>章节</span></a></li>
                                <li><a id="commentOn" class=""
                                       href="{% url 'course:course_comments' course.id %}"><span>评论</span></a></li>
                            </ul>
                        </div>
                        <div id="notice" class="clearfix">
                            <div class="l"><strong>课程公告:</strong> <a
                                    href="javascript:void(0)">Spring的文档以及相关的jar文件已上传</a></div>
                        </div>

                        <div class="mod-chapters">
                            {% for lesson in course.lesson_set.get_queryset %}
                                <div class="chapter chapter-active">
                                    <h3>
                                        <strong><i class="state-expand"></i>{{ lesson.name }}</strong>
                                    </h3>
                                    <ul class="video">

                                        {% for video in lesson.video_set.get_queryset %}
                                            <li>
                                                <a target="_blank" href='{% url 'course:video_play' video.id %}'
                                                   class="J-media-item studyvideo">{{ video.name }}
                                                    ({{ video.learn_times }})
                                                    <i class="study-state"></i>
                                                </a>
                                            </li>
                                        {% endfor %}

                                    </ul>
                                </div>
                            {% endfor %}
                        </div>

                    </div>
                    <div class="aside r">
                        <div class="bd">

                            <div class="box mb40">
                                <h4>资料下载</h4>
                                <ul class="downlist">
                                    {% for course_resource in course.courseresource_set.get_queryset %}
                                        <li>
                                            <span><i
                                                    class="aui-iconfont aui-icon-file"></i>&nbsp;&nbsp;{{ course_resource.name }}</span>
                                            <a href="{{ MEDIA_URL }}{{ course_resource.download }}" class="downcode"
                                               target="_blank" download="" data-id="274" title="">下载</a>
                                        </li>
                                    {% endfor %}
                                </ul>
                            </div>
                            <div class="box mb40">
                                <h4>讲师提示</h4>
                                <div class="teacher-info">
                                    <a href="{% url 'org:teacher_detail' course.teacher.id %}" target="_blank">
                                        <img src='{{ MEDIA_URL }}{{ course.teacher.image }}' width='80' height='80'/>
                                    </a>
                                    <span class="tit">
          <a href="{% url 'org:teacher_detail' course.teacher.id %}" target="_blank">{{ course.teacher.name }}</a>
        </span>
                                    <span class="job">{{ course.teacher.work_position }}</span>
                                </div>
                                <div class="course-info-tip">
                                    <dl class="first">
                                        <dt>课程须知</dt>
                                        <dd class="autowrap">{{ course.you_need_know }}</dd>
                                    </dl>
                                    <dl>
                                        <dt>老师告诉你能学到什么？</dt>
                                        <dd class="autowrap">{{ course.teacher_tell }}</dd>
                                    </dl>
                                </div>
                            </div>


                            <div class="cp-other-learned  js-comp-tabs">
                                <div class="cp-header clearfix">
                                    <h2 class="cp-tit l">该课的同学还学过</h2>
                                </div>
                                <div class="cp-body">
                                    <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="course"
                                         style="display: block">
                                        <!-- img 200 x 112 -->
                                        <ul class="other-list">

                                            {% for relate_course in relate_courses %}
                                                <li class="curr">
                                                    <a href="{% url 'course:course_detail' relate_course.id %}"
                                                       target="_blank">
                                                        <img src="{{ MEDIA_URL }}{{ relate_course.image }}"
                                                             alt="{{ relate_course.name }}">
                                                        <span class="name autowrap">{{ relate_course.name }}</span>
                                                    </a>
                                                </li>
                                            {% endfor %}

                                        </ul>
                                    </div>
                                    <div class="cp-tab-pannel js-comp-tab-pannel" data-pannel="plan">
                                        <ul class="other-list">

                                        </ul>
                                    </div>
                                </div>
                            </div>

                        </div>
                    </div>
                </div>
                <div class="clear"></div>

            </div>

        </div>
    </div>
{% endblock %}