Django+xadmin打造在线教育平台（五）

2022-10-27 07:58:00

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

八、课程详情页功能的实现

8.1.课程列表

（1）配置urls

MxOnline/urls中

path("course/", include('course.urls', namespace="course")),

course里面新建urls.py

# course/urls.py

from django.urls import path,re_path

from .views import CourseListView

# 要写上app的名字

app_name = "course"

urlpatterns = [

    path('list/',CourseListView.as_view(),name='course_list'),

]

把course-list.html拷贝到templates目录下

from django.shortcuts import render

from django.views.generic import View

class CourseListView(View):

    def get(self, request):

        return render(request, "course-list.html")

（2）course-list.html继承base.html

修改title，修改bread里面，content里面放course-list独有的

{#templates/course-list.html#}

{% extends 'base.html' %}

{% load staticfiles %}

{% block title %}公开课列表{% endblock %}

{% block custom_bread %}

    <section>

        <div class="wp">

            <ul class="crumbs">

                <li><a href="index.html">首页</a>></li>

                <li>公开课</li>

            </ul>

        </div>

    </section>

{% endblock %}

{% block content %}

<section>

    <div class="wp">

        <div class="list" style="margin-top:0;">

            <div class="left layout">

                <div class="head">

                    <ul class="tab_header">

                        <li class="active"><a href="?sort=">最新 </a></li>

                        <li ><a href="?sort=hot">最热门</a></li>

                        <li ><a href="?sort=students">参与人数</a></li>

                    </ul>

                </div>

                <div id="inWindow">

                    <div class="tab_cont " id="content">

                    <div class="group_list">

                            <div class="box">

                                <a href="course-detail.html">

                                    <img width="280" height="350" class="scrollLoading" src="{% static 'media/courses/2016/12/mysql.jpg' %}"/>

                                </a>

                                <div class="des">

                                    <a href="course-detail.html">

                                        <h2>xadmin进阶开发</h2>

                                    </a>

                                    <span class="fl">时长：<i class="key">30</i></span>

                                    <span class="fr">学习人数：2&nbsp;&nbsp;</span>

                                </div>

                                <div class="bottom">

                                    <a href="course-detail.html"><span class="fl">来自慕课网</span></a>

                                    <span class="star fr  notlogin

                                        " data-favid="15">

                                        1

                                    </span>

                                </div>

                            </div>

                    </div>

                    <div class="pageturn">

                        <ul class="pagelist">

                                        <li class="active"><a href="?page=1">1</a></li>

                                        <li><a href="?page=2" class="page">2</a></li>

                                <li class="long"><a href="?page=2">下一页</a></li>

                        </ul>

                    </div>

                </div>

                </div>

            </div>

            <div class="right layout">

                <div class="head">热门课程推荐</div>

                <div class="group_recommend">

                    <dl>

                        <dt>

                            <a target="_blank" href="">

                                <img width="240" height="220" class="scrollLoading" src="{% static 'media/courses/2016/11/540e57300001d6d906000338-240-135_n0L8vbw.jpg' %}"/>

                            </a>

                        </dt>

                        <dd>

                            <a target="_blank" href=""><h2> django与vuejs实战项目2</h2></a>

                            <span class="fl">难度：<i class="key">高级</i></span>

                        </dd>

                    </dl>

                </div>

            </div>

        </div>

    </div>

</section>

{% endblock %}

course-list.html

然后去后台添加十门课程

（3）列表展示

views.py

# course/views.py

from django.shortcuts import render

from django.views.generic import View

from .models import Course

class CourseListView(View):

    def get(self, request):

        all_courses = Course.objects.all()

        return render(request, "course-list.html",{'all_courses':all_courses})

course-list.html

 <div class="group_list">

    {% for course in all_course %}

    <div class="box">

        <a href="course-detail.html">

            <img width="280" height="350" class="scrollLoading" src="{{ MEDIA_URL }}{{ course.image }}"/>

        </a>

        <div class="des">

            <a href="course-detail.html">

                <h2>{{ course.name }}</h2>

            </a>

            <span class="fl">时长：<i class="key">{{ course.learn_times }}</i></span>

            <span class="fr">学习人数：{{ course.students }}&nbsp;&nbsp;</span>

        </div>

        <div class="bottom">

            <a href="course-detail.html"><span class="fl">来自{{ course.course_org.name }}</span></a>

            <span class="star fr  notlogin

                " data-favid="15">

                {{ course.fav_nums }}

            </span>

        </div>

    </div>

    {% endfor %}

8.2.分页

        try:

            page = request.GET.get('page', 1)

        except PageNotAnInteger:

            page = 1

        p = Paginator(all_courses,2 , request=request)

        courses = p.page(page)

<div class="pageturn">

                        <ul class="pagelist">

                            {% if all_courses.has_previous %}

                                <li class="long"><a href="?{{ all_courses.previous_page_number.querystring }}">上一页</a></li>

                            {% endif %}

                            {% for page in all_courses.pages %}

                                {% if page %}

                                    {% ifequal page all_courses.number %}

                                        <li class="active"><a href="?{{ page.querystring }}">{{ page }}</a></li>

                                    {% else %}

                                        <li><a href="?{{ page.querystring }}" class="page">{{ page }}</a></li>

                                    {% endifequal %}

                                {% else %}

                                    <li class="none"><a href="">...</a></li>

                                {% endif %}

                            {% endfor %}

                            {% if all_courses.has_next %}

                                <li class="long"><a href="?{{ all_courses.next_page_number.querystring }}">下一页</a></li>

                            {% endif %}

                        </ul>

                    </div>

8.3.排序

class CourseListView(View):

    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,

        })

<div class="head">

                    <ul class="tab_header">

                        <li class="{% ifequal sort '' %}active{% endifequal %}"><a href="?sort=" >最新 </a></li>

                        <li class="{% ifequal sort 'hot' %}active{% endifequal %}"><a href="?sort=hot" >最热门 </a></li>

                        <li class="{% ifequal sort 'students' %}active{% endifequal %}"><a href="?sort=students" >参与人数 </a></li>

                    </ul>

                </div>

<div class="head">热门课程推荐</div>

                <div class="group_recommend">

                    {% for hot_course in hot_courses %}

                    <dl>

                        <dt>

                            <a target="_blank" href="">

                                <img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ hot_course.image }}"/>

                            </a>

                        </dt>

                        <dd>

                            <a target="_blank" href=""><h2> {{ hot_course.name }}</h2></a>

                            <span class="fl">难度：<i class="key">{{ hot_course.get_degree_display }}</i></span>

                        </dd>

                    </dl>

                    {% endfor %}

{#templates/course-list.html#}

{% extends 'base.html' %}

{% load staticfiles %}

{% block title %}公开课列表{% endblock %}

{% block custom_bread %}

    <section>

        <div class="wp">

            <ul class="crumbs">

                <li><a href="index.html">首页</a>></li>

                <li>公开课</li>

            </ul>

        </div>

    </section>

{% endblock %}

{% block content %}

<section>

    <div class="wp">

        <div class="list" style="margin-top:0;">

            <div class="left layout">

                <div class="head">

                    <ul class="tab_header">

                        <li class="{% ifequal sort '' %}active{% endifequal %}"><a href="?sort=" >最新 </a></li>

                        <li class="{% ifequal sort 'hot' %}active{% endifequal %}"><a href="?sort=hot" >最热门 </a></li>

                        <li class="{% ifequal sort 'students' %}active{% endifequal %}"><a href="?sort=students" >参与人数 </a></li>

                    </ul>

                </div>

                <div id="inWindow">

                    <div class="tab_cont " id="content">

                    <div class="group_list">

                            {% for course in all_courses.object_list %}

                            <div class="box">

                                <a href="course-detail.html">

                                    <img width="280" height="350" class="scrollLoading" src="{{ MEDIA_URL }}{{ course.image }}"/>

                                </a>

                                <div class="des">

                                    <a href="course-detail.html">

                                        <h2>{{ course.name }}</h2>

                                    </a>

                                    <span class="fl">时长：<i class="key">{{ course.learn_times }}</i></span>

                                    <span class="fr">学习人数：{{ course.students }}&nbsp;&nbsp;</span>

                                </div>

                                <div class="bottom">

                                    <a href="course-detail.html"><span class="fl">来自{{ course.course_org.name }}</span></a>

                                    <span class="star fr  notlogin

                                        " data-favid="15">

                                        {{ course.fav_nums }}

                                    </span>

                                </div>

                            </div>

                            {% endfor %}

                    </div>

                    <div class="pageturn">

                        <ul class="pagelist">

                            {% if all_courses.has_previous %}

                                <li class="long"><a href="?{{ all_courses.previous_page_number.querystring }}">上一页</a></li>

                            {% endif %}

                            {% for page in all_courses.pages %}

                                {% if page %}

                                    {% ifequal page all_courses.number %}

                                        <li class="active"><a href="?{{ page.querystring }}">{{ page }}</a></li>

                                    {% else %}

                                        <li><a href="?{{ page.querystring }}" class="page">{{ page }}</a></li>

                                    {% endifequal %}

                                {% else %}

                                    <li class="none"><a href="">...</a></li>

                                {% endif %}

                            {% endfor %}

                            {% if all_courses.has_next %}

                                <li class="long"><a href="?{{ all_courses.next_page_number.querystring }}">下一页</a></li>

                            {% endif %}

                        </ul>

                    </div>

                </div>

                </div>

            </div>

            <div class="right layout">

                <div class="head">热门课程推荐</div>

                <div class="group_recommend">

                    {% for hot_course in hot_courses %}

                    <dl>

                        <dt>

                            <a target="_blank" href="">

                                <img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ hot_course.image }}"/>

                            </a>

                        </dt>

                        <dd>

                            <a target="_blank" href=""><h2> {{ hot_course.name }}</h2></a>

                            <span class="fl">难度：<i class="key">{{ hot_course.get_degree_display }}</i></span>

                        </dd>

                    </dl>

                    {% endfor %}

                </div>

            </div>

        </div>

    </div>

</section>

{% endblock %}

course-list.html

course-list.html

# course/views.py

from django.shortcuts import render

from django.views.generic import View

from .models import Course

from pure_pagination import Paginator, EmptyPage, PageNotAnInteger

class CourseListView(View):

    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,

        })

views.py

8.4.课程详情

course-detail.html复制进来

（1）url配置

re_path('course/(?P<course_id>\d+)/', CourseDetailView.as_view(), name="course_detail"),

class CourseDetailView(View):

    '''课程详情'''

    def get(self, request, course_id):

        return  render(request, "course-detail.html", {

        })

在course-list.html中添加链接到详情

（2）views

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()

        return  render(request, "course-detail.html", {

            'course':course,

        })

（3）Course model增加

一个category字段
一个获取章节数的方法
一个获取这么课程的学习用户方法

class Course(models.Model):

    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)

    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_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

Course

（4）course-detail.html中课程详情信息显示

<div class="picbox">

                        <div class="tb-booth tb-pic">

                            <img width="440" height="445" src="{{ MEDIA_URL }}{{ course.image }}" class="jqzoom" />

                        </div>

                    </div>

                    <div class="des">

                        <h1 title="{{ course.name }}">{{ course.name }}</h1>

                        <span class="key">{{ course.desc }}</span>

                        <div class="prize">

                            <span class="fl">难度：<i class="key">{{ course.get_degree_display }}</i></span>

                            <span class="fr">学习人数：{{ course.students }}</span>

                        </div>

                        <ul class="parameter">

                            <li><span class="pram word3">时&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;长：</span><span>{{ course.learn_times }}</span></li>

                            <li><span class="pram word3">章&nbsp;节&nbsp;数：</span><span>{{ course.get_zj_nums }}</span></li>

                            <li><span class="pram word3">课程类别：</span><span title="">{{ course.category }}</span></li>

                            <li class="piclist"><span class="pram word4">学习用户：</span>

                                {% for user_course in course.get_learn_users %}

                                    <span class="pic"><img width="40" height="40" src="{{ MEDIA_URL }}{{ user_course.user.image }}"/></span>

                                {% endfor %}

                            </li>

                        </ul>

                        <div class="btns">

显示课程详情

8.5.授课机构

（1）CourseOrg model添加一个获取教师数的方法

    def get_teacher_nums(self):

        #获取机构的教师数

        return self.teacher_set.all().count()

class CourseOrg(models.Model):

    ORG_CHOICES = (

        ("pxjg", u"培训机构"),

        ("gx", u"高校"),

        ("gr", u"个人"),

    )

    name = models.CharField('机构名称',max_length=50)

    desc = models.TextField('机构描述')

    category = models.CharField(max_length=20, choices=ORG_CHOICES, verbose_name=u"机构类别", default="pxjg")

    click_nums = models.IntegerField('点击数',default=0)

    fav_nums = models.IntegerField('收藏数',default=0)

    students = models.IntegerField("学习人数",default=0)

    course_nums = models.IntegerField("课程数",default=0)

    image = models.ImageField('logo',upload_to='org/%Y/%m',max_length=100)

    address = models.CharField('机构地址',max_length=150,)

    city = models.ForeignKey(CityDict,verbose_name='所在城市',on_delete=models.CASCADE)

    add_time = models.DateTimeField(default=datetime.now)

    class Meta:

        verbose_name = '课程机构'

        verbose_name_plural = verbose_name

    def get_teacher_nums(self):

        #获取机构的教师数

        return self.teacher_set.all().count()

    def __str__(self):

        return self.name

CourseOrg

（2）授课机构显示

<div class="head">

                        <h1>授课机构</h1>

                        <p>世界名校，课程权威</p>

                    </div>

                    <div class="pic">

                        <a href="/company/14/">

                            <img width="150" height="80" src="{{ MEDIA_URL }}{{ course.course_org.image }}"/>

                        </a>

                    </div>

                    <a href="/company/14/">

                        <h2 class="center" title="清华大学">{{ course.course_org.name }}</h2>

                    </a>

                    <div class="btn  notlogin

                         "data-favid="14" id="jsRightBtn">

                         已收藏

                    </div>

                    <div class="clear">

                        <ul>

                            <li>

                                <span>课 &nbsp;程&nbsp; 数：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   {{ course.course_org.course_nums }}</span>

                            </li>

                            <li>

                                <span>教 &nbsp;师&nbsp; 数：&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  {{ course.course_org.get_teacher_nums }}</span>

                            </li>

                            <li>所在地区：&nbsp;&nbsp;{{ course.course_org.address }}</li>

                            <li>认&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;证&nbsp;:

                                &nbsp;&nbsp;

                                    <img title="金牌机构", src="{% static 'images/gold.png' %}"/>

                            </li>

                        </ul>

                    </div>

                </div>

8.6.相关课程推荐

（1）给“Course” model添加一个“课程标签”字段

tag = models.CharField('课程标签',default='',max_length=10)

class Course(models.Model):

    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_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

Course

（2）views

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

        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)[:3]

        else:

            relate_courses = []

        return  render(request, "course-detail.html", {

            'course':course,

            'relate_courses':relate_courses,

        })

（3）前端

<div class="right layout">

                <div class="head">相关课程推荐</div>

                <div class="group_recommend">

                        {% for relate_course in relate_courses %}

                        <dl>

                            <dt>

                                <a target="_blank" href="">

                                    <img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ relate_course.image }}"/>

                                </a>

                            </dt>

                            <dd>

                                <a target="_blank" href=""><h2> {{ relate_course.name }}</h2></a>

                                <span class="fl">学习时长：<i class="key">{{ relate_course.learn_times }}</i></span>

                            </dd>

                        </dl>

                        {% endfor %}

                </div>

            </div>

8.7.课程收藏和机构收藏

{% block custom_js %}{% endblock %}，放到最下面的位置，因为是js代码，要最后加载

后端判断当前收藏转态

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,

        })

course-detail.html中添加Ajax

{% block custom_js %}

    <script type="text/javascript">

//收藏分享

function add_fav(current_elem, fav_id, fav_type){

    $.ajax({

        cache: false,

        type: "POST",

        url:"{% url "org:add_fav" %}",

        data:{'fav_id':fav_id, 'fav_type':fav_type},

        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'){

                current_elem.text(data.msg)

            }

        },

    });

}

$('#jsLeftBtn').on('click', function(){

    add_fav($(this), {{ course.id }}, 1);

});

$('#jsRightBtn').on('click', function(){

    add_fav($(this), {{ course.course_org.id }}, 2);

});

</script>

{% endblock %}

码农公寓

八、课程详情页功能的实现

8.1.课程列表

8.2.分页

8.3.排序

8.4.课程详情

8.5.授课机构

8.6.相关课程推荐

8.7.课程收藏和机构收藏

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