项目搭建4-课程详情

课程详情页显示

课程详情页 views/Info.vue，代码：

<template>
    <div class="detail">
      <Header/>
      <div class="main">
        <div class="course-info">
          <div class="wrap-left">
            <!-- 课程封面或封面商品 -->
          </div>
          <div class="wrap-right">
            <h3 class="course-name">Linux系统基础5周入门精讲</h3>
            <p class="data">23475人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：148课时/180小时&nbsp;&nbsp;&nbsp;&nbsp;难度：初级</p>
            <div class="sale-time">
              <p class="sale-type">限时免费</p>
              <p class="expire">距离结束：仅剩 01天 04小时 33分 <span class="second">08</span> 秒</p>
            </div>
            <p class="course-price">
              <span>活动价</span>
              <span class="discount">¥0.00</span>
              <span class="original">¥29.00</span>
            </p>
            <div class="buy">
              <div class="buy-btn">
                <button class="buy-now">立即购买</button>
                <button class="free">免费试学</button>
              </div>
              <div class="add-cart"><img src="../assets/cart-yellow.svg" alt="">加入购物车</div>
            </div>
          </div>
        </div>
        <div class="course-tab">
          <ul class="tab-list">
            <li :class="state.tabIndex===1?'active':''" @click="state.tabIndex=1">详情介绍</li>
            <li :class="state.tabIndex===2?'active':''" @click="state.tabIndex=2">课程章节 <span :class="state.tabIndex!==2?'free':''">(试学)</span></li>
            <li :class="state.tabIndex===3?'active':''" @click="state.tabIndex=3">用户评论 (42)</li>
            <li :class="state.tabIndex===4?'active':''" @click="state.tabIndex=4">常见问题</li>
          </ul>
        </div>
        <div class="course-content">
          <div class="course-tab-list">
            <div class="tab-item" v-if="state.tabIndex===1">
              <p><img alt="" src="//hcdn2.luffycity.com/media/frontend/activity/详情页_01.png"></p>
            </div>
            <div class="tab-item" v-if="state.tabIndex===2">
              <div class="tab-item-title">
                <p class="chapter">课程章节</p>
                <p class="chapter-length">共11章 147个课时</p>
              </div>
              <div class="chapter-item">
                <p class="chapter-title"><img src="../assets/1.svg" alt="">第1章·Linux硬件基础</p>
                <ul class="lesson-list">
                  <li class="lesson-item">
                    <p class="name"><span class="index">1-1</span> 课程介绍-学习流程<span class="free">免费</span></p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即试学</button>
                  </li>
                  <li class="lesson-item">
                    <p class="name"><span class="index">1-2</span> 服务器硬件-详解<span class="free">免费</span></p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即试学</button>
                  </li>
                </ul>
              </div>
              <div class="chapter-item">
                <p class="chapter-title"><img src="../assets/1.svg" alt="">第2章·Linux发展过程</p>
                <ul class="lesson-list">
                  <li class="lesson-item">
                    <p class="name"><span class="index">2-1</span> 操作系统组成-Linux发展过程</p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即购买</button>
                  </li>
                  <li class="lesson-item">
                    <p class="name"><span class="index">2-2</span> 自由软件-GNU-GPL核心讲解</p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即购买</button>
                  </li>
                </ul>
              </div>
            </div>
            <div class="tab-item" v-if="state.tabIndex===3">
              用户评论
            </div>
            <div class="tab-item" v-if="state.tabIndex===4">
              常见问题
            </div>
          </div>
          <div class="course-side">
             <div class="teacher-info">
               <h4 class="side-title"><span>授课老师</span></h4>
               <div class="teacher-content">
                 <div class="cont1">
                   <img src="../assets/avatar.jpg">
                   <div class="name">
                     <p class="teacher-name">Avrion</p>
                     <p class="teacher-title">老男孩LInux学科带头人</p>
                   </div>
                 </div>
                 <p class="narrative" >路飞学城高级讲师，曾参与新加坡南洋理工大学大数据医疗相关项目，就职过多家互联网企业，有着多年开发经验，精通java,python,go等编程语言</p>
               </div>
             </div>
          </div>
        </div>
      </div>
      <Footer/>
    </div>
</template>
<script setup>
import {reactive,ref,watch} from "vue"
import {useRoute} from "vue-router"
import Header from "../components/Header.vue"
import Footer from "../components/Footer.vue"
let route = useRoute()
const state = reactive({
  course_id: route.params.id,
  tabIndex: 2,
})
</script>
<style scoped>
.main{
  background: #fff;
  padding-top: 30px;
}
.course-info{
  width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}
.wrap-left{
  float: left;
  width: 690px;
  height: 388px;
  background-color: #000;
}
.wrap-right{
  float: left;
  position: relative;
  height: 388px;
}
.course-name{
  font-size: 20px;
  color: #333;
  padding: 10px 23px;
  letter-spacing: .45px;
}
.data{
  padding-left: 23px;
  padding-right: 23px;
  padding-bottom: 16px;
  font-size: 14px;
  color: #9b9b9b;
}
.sale-time{
  width: 464px;
  background: #fa6240;
  font-size: 14px;
  color: #4a4a4a;
  padding: 10px 23px;
  overflow: hidden;
}
.sale-type {
  font-size: 16px;
  color: #fff;
  letter-spacing: .36px;
  float: left;
}
.sale-time .expire{
  font-size: 14px;
  color: #fff;
  float: right;
}
.sale-time .expire .second{
  width: 24px;
  display: inline-block;
  background: #fafafa;
  color: #5e5e5e;
  padding: 6px 0;
  text-align: center;
}
.course-price{
  background: #fff;
  font-size: 14px;
  color: #4a4a4a;
  padding: 5px 23px;
}
.discount{
  font-size: 26px;
  color: #fa6240;
  margin-left: 10px;
  display: inline-block;
  margin-bottom: -5px;
}
.original{
  font-size: 14px;
  color: #9b9b9b;
  margin-left: 10px;
  text-decoration: line-through;
}
.buy{
  width: 464px;
  padding: 0px 23px;
  position: absolute;
  left: 0;
  bottom: 20px;
  overflow: hidden;
}
.buy .buy-btn{
  float: left;
}
.buy .buy-now{
  width: 125px;
  height: 40px;
  border: 0;
  background: #ffc210;
  border-radius: 4px;
  color: #fff;
  cursor: pointer;
  margin-right: 15px;
  outline: none;
}
.buy .free{
  width: 125px;
  height: 40px;
  border-radius: 4px;
  cursor: pointer;
  margin-right: 15px;
  background: #fff;
  color: #ffc210;
  border: 1px solid #ffc210;
}
.add-cart{
  float: right;
  font-size: 14px;
  color: #ffc210;
  text-align: center;
  cursor: pointer;
  margin-top: 10px;
}
.add-cart img{
  width: 20px;
  height: 18px;
  margin-right: 7px;
  vertical-align: middle;
}
.course-tab{
    width: 100%;
    background: #fff;
    margin-bottom: 30px;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.course-tab .tab-list{
    width: 1200px;
    margin: auto;
    color: #4a4a4a;
    overflow: hidden;
}
.tab-list li{
    float: left;
    margin-right: 15px;
    padding: 26px 20px 16px;
    font-size: 17px;
    cursor: pointer;
}
.tab-list .active{
    color: #ffc210;
    border-bottom: 2px solid #ffc210;
}
.tab-list .free{
    color: #fb7c55;
}
.course-content{
    width: 1200px;
    margin: 0 auto;
    background: #FAFAFA;
    overflow: hidden;
    padding-bottom: 40px;
}
.course-tab-list{
    width: 880px;
    height: auto;
    padding: 20px;
    background: #fff;
    float: left;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.tab-item{
    width: 880px;
    background: #fff;
    padding-bottom: 20px;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.tab-item-title{
    justify-content: space-between;
    padding: 25px 20px 11px;
    border-radius: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid #333;
    border-bottom-color: rgba(51,51,51,.05);
    overflow: hidden;
}
.chapter{
    font-size: 17px;
    color: #4a4a4a;
    float: left;
}
.chapter-length{
    float: right;
    font-size: 14px;
    color: #9b9b9b;
    letter-spacing: .19px;
}
.chapter-title{
    font-size: 16px;
    color: #4a4a4a;
    letter-spacing: .26px;
    padding: 12px;
    background: #eee;
    border-radius: 2px;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
}
.chapter-title img{
    width: 18px;
    height: 18px;
    margin-right: 7px;
    vertical-align: middle;
}
.lesson-list{
    padding:0 20px;
}
.lesson-list .lesson-item{
    padding: 15px 20px 15px 36px;
    cursor: pointer;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}
.lesson-item .name{
    font-size: 14px;
    color: #666;
    float: left;
}
.lesson-item .index{
    margin-right: 5px;
}
.lesson-item .free{
    font-size: 12px;
    color: #fff;
    letter-spacing: .19px;
    background: #ffc210;
    border-radius: 100px;
    padding: 1px 9px;
    margin-left: 10px;
}
.lesson-item .time{
    font-size: 14px;
    color: #666;
    letter-spacing: .23px;
    opacity: 1;
    transition: all .15s ease-in-out;
    float: right;
}
.lesson-item .time img{
    width: 18px;
    height: 18px;
    margin-left: 15px;
    vertical-align: text-bottom;
}
.lesson-item .try{
    width: 86px;
    height: 28px;
    background: #ffc210;
    border-radius: 4px;
    font-size: 14px;
    color: #fff;
    position: absolute;
    right: 20px;
    top: 10px;
    opacity: 0;
    transition: all .2s ease-in-out;
    cursor: pointer;
    outline: none;
    border: none;
}
.lesson-item:hover{
    background: #fcf7ef;
    box-shadow: 0 0 0 0 #f3f3f3;
}
.lesson-item:hover .name{
    color: #333;
}
.lesson-item:hover .try{
    opacity: 1;
}
.course-side{
    width: 300px;
    height: auto;
    margin-left: 20px;
    float: right;
}
.teacher-info{
    background: #fff;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px 0 #f0f0f0;
}
.side-title{
    font-weight: normal;
    font-size: 17px;
    color: #4a4a4a;
    padding: 18px 14px;
    border-bottom: 1px solid #333;
    border-bottom-color: rgba(51,51,51,.05);
}
.side-title span{
    display: inline-block;
    border-left: 2px solid #ffc210;
    padding-left: 12px;
}
.teacher-content{
    padding: 30px 20px;
    box-sizing: border-box;
}
.teacher-content .cont1{
    margin-bottom: 12px;
    overflow: hidden;
}
.teacher-content .cont1 img{
    width: 54px;
    height: 54px;
    margin-right: 12px;
    float: left;
}
.teacher-content .cont1 .name{
    float: right;
}
.teacher-content .cont1 .teacher-name{
    width: 188px;
    font-size: 16px;
    color: #4a4a4a;
    padding-bottom: 4px;
}
.teacher-content .cont1 .teacher-title{
    width: 188px;
    font-size: 13px;
    color: #9b9b9b;
    white-space: nowrap;
}
.teacher-content .narrative{
    font-size: 14px;
    color: #666;
    line-height: 24px;
}
</style>

路由显示，router/index.js，代码：

import {createRouter, createWebHistory, createWebHashHistory} from 'vue-router'
import store from "../store";

// 路由列表
const routes = [
  {
    meta:{
        title: "luffy2.0-站点首页",
        keepAlive: true
    },
    path: '/',         // uri访问地址
    name: "Home",
    component: ()=> import("../views/Home.vue")
  },
  {
    meta:{
        title: "luffy2.0-用户登录",
        keepAlive: true
    },
    path:'/login',      // uri访问地址
    name: "Login",
    component: ()=> import("../views/Login.vue")
  },
  {
      meta:{
        title: "luffy2.0-用户注册",
        keepAlive: true
      },
      path: '/register',
      name: "Register",            // 路由名称
      component: ()=> import("../views/Register.vue"),         // uri绑定的组件页面
  },
  {
    meta:{
        title: "luffy2.0-个人中心",
        keepAlive: true,
        authorization: true,
    },
    path: '/user',
    name: "User",
    component: ()=> import("../views/User.vue"),
  },
  {
    meta:{
        title: "luffy2.0-课程列表",
        keepAlive: true,
    },
    path: '/project',
    name: "Course",
    component: ()=> import("../views/Course.vue"),
  },
  {
    meta:{
        title: "luffy2.0-课程详情",
        keepAlive: true
    },
    path: '/project/:id',     // :id vue的路径参数，代表了课程的ID
    name: "Info",
    component: ()=> import("../views/Info.vue"),
  }
]


// 路由对象实例化
const router = createRouter({
  // history, 指定路由的模式
  history: createWebHistory(),
  // 路由列表
  routes,
});

// 导航守卫
router.beforeEach((to, from, next)=>{
  document.title=to.meta.title
  // 登录状态验证
  if (to.meta.authorization && !store.getters.getUserInfo) {
    next({"name": "Login"})
  }else{
    next()
  }
})


// 暴露路由对象
export default router

课程列表的组件中， 打通点击前往详情页的链接地址，views/Course.vue，代码：

<ul class="course-list clearfix">
              <li class="course-card" v-for="course_info in course.course_list">
                <router-link :to="`/project/${course_info.id}`">
                    <div class="img"><img :src="course_info.course_cover" alt=""></div>
                    <p class="title ellipsis2">{{course_info.name}}</p>
                    <p class="one">
                        <span>{{course_info.get_level_display}} · {{course_info.students}}人报名</span>
                        <span class="discount r">
                          <i class="name" v-if="course_info.discount.type">{{course_info.discount.type}}</i>
                          <i class="countdown" v-if="course_info.discount.expire">{{parseInt(course_info.discount.expire/86400)}}<span class="day">天</span>{{fill0(parseInt(course_info.discount.expire/3600%24))}}:{{fill0(parseInt(course_info.discount.expire/60%60))}}:{{fill0(parseInt(course_info.discount.expire%60))}}</i>
                        </span>
                    </p>
                    <p class="two clearfix">
                        <span class="price l red bold" v-if="course_info.discount.price">￥{{parseFloat(course_info.discount.price).toFixed(2)}}</span>
                        <span class="price l red bold" v-else>￥{{parseFloat(course_info.price).toFixed(2)}}</span>
                        <span class="origin-price l delete-line" v-if="course_info.discount.price">￥{{parseFloat(course_info.price).toFixed(2)}}</span>
                        <span class="add-shop-cart r"><img class="icon imv2-shopping-cart" src="../assets/cart2.svg">加购物车</span>
                    </p>
                </router-link>
              </li>
            </ul>

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 客户端展示课程详情页"
git push

视频播放器

针对客户端的课程详情页的左上角内容，我们可以显示课程的详情图片，如果有课程的介绍视频，也可以优先显示视频，

当然播放视频，肯定需要对应的播放器插件。市面上很多：百度云、腾讯云、网易云、阿里云、又拍云、七牛云或者其他第三方。

OK，接下来使用的播放器组件，选择使用了阿里云播放器（vue-alipayer视频播放组件），所以我们需要先预安装。

vue-alipayer地址：https://github.com/liho98/vue-aliplayer-v2

演示效果：https://player.alicdn.com/aliplayer/index.html

安装依赖

cd /home/moluo/Desktop/luffycity/luffycityweb/
yarn add vue-aliplayer-v3

Info.vue页面组件中调用播放器组件，代码：

          <div class="wrap-left">
            <!-- 课程封面或封面商品 -->
            <AliPlayerV3
              ref="player"
              class="h-64 md:h-96 w-full rounded-lg"
              style="height: 100%; width: 100%;"
              :options="options"
              @play="onPlay($event)"
              @pause="onPause($event)"
              @playing="onPlaying($event)"
            />
          </div>

<script setup>
import {reactive,ref,watch} from "vue"
import {useRoute} from "vue-router"
import Header from "../components/Header.vue"
import Footer from "../components/Footer.vue"
import { AliPlayerV3 } from "vue-aliplayer-v3"

let route = useRoute()
let player = ref(null)

const state = reactive({
  course_id: route.params.id,
  tabIndex: 2,
})

const options = reactive({
  source: "/src/assets/1.mp4",
  cover: "/src/assets/course-1.png",
  autoplay: false,
  preload: true,
  isLive: false, //切换为直播流的时候必填true
  // format: 'm3u8'  //切换为直播流的时候必填
})

const onPlay = (event)=>{
  console.log("播放视频");
  console.log(player.value.getCurrentTime());
}

const onPause = (event)=>{
  console.log("暂停播放");
  console.log(player.value.getCurrentTime());
}

const onPlaying = (event)=>{
  console.log("播放中");
  console.log(player.value.getCurrentTime());
}

</script>

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 客户端基于aliplayer播放器插件展示课程封面图片与视频"
git push

后端提供课程详情页数据接口

courses/serializers.py，序列化器代码:

from .models import Teacher


class CourseTearchModelSerializer(serializers.ModelSerializer):
    """课程老师信息"""

    class Meta:
        model = Teacher
        fields = ["id", "name", "avatar", "role", "get_role_display", "title", "signature", "brief"]


class CourseRetrieveModelSerializer(serializers.ModelSerializer):
    """课程详情的序列化器"""
    diretion_name = serializers.CharField(source="diretion.name")
    # diretion = serializers.SlugRelatedField(read_only=True, slug_field='name')
    category_name = serializers.CharField(source="category.name")
    # 序列化器嵌套
    teacher = CourseTearchModelSerializer()

    class Meta:
        model = Course
        fields = [
            "name", "course_cover", "course_video", "level", "get_level_display",
            "description", "pub_date", "status", "get_status_display", "students","discount",
            "lessons", "pub_lessons", "price", "diretion", "diretion_name", "category", "category_name", "teacher"
        ]

视图代码：

from rest_framework.generics import RetrieveAPIView
from .models import Course
from .serializers import CourseRetrieveModelSerializer


class CourseRetrieveAPIView(RetrieveAPIView):
    """课程详情信息"""
    queryset = Course.objects.filter(is_show=True, is_delete=False).all()
    serializer_class = CourseRetrieveModelSerializer

路由代码:

urlpatterns = [
    # 。。。。
    re_path("^(?P<pk>\d+)/$", views.CourseRetrieveAPIView.as_view()),
]

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 服务端提供课程详情的api接口"
git push

客户端请求api接口并展示课程详情信息

src/api/course.js，代码：

import http from "../utils/http";
import {reactive, ref} from "vue"


const course = reactive({
    // 中间代码省略...
    course_id: null,  // 课程ID
    info: {           // 课程详情信息
        teacher:{},   // 课程相关的老师信息
        discount:{    // 课程相关的折扣信息
          type: ""
        }
    },
    tabIndex: 1,      // 课程详情页中默认展示的课程信息的选项卡
    // 中间代码省略...
    // 获取课程详情
    get_course(){
        return http.get(`/courses/${this.course_id}`)
    },
})

export default course;

views/Info.vue，代码：

<template>
    <div class="detail">
      <Header/>
      <div class="main">
        <div class="course-info">
          <div class="wrap-left">
            <!-- 课程封面或封面商品 -->
            <AliPlayerV3
              ref="player"
              class="h-64 md:h-96 w-full rounded-lg"
              style="height: 100%; width: 100%;"
              :source="course.info.course_video"
              :cover="course.info.course_cover"
              :options="options"
              @play="onPlay($event)"
              @pause="onPause($event)"
              @playing="onPlaying($event)"
              v-if="course.info.course_video"
            />
            <img :src="course.info.course_cover" style="width: 100%;" alt="" v-else>
          </div>
          <div class="wrap-right">
            <h3 class="course-name">{{course.info.name}}</h3>
            <p class="data">{{course.info.students}}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长：{{course.info.pub_lessons}}课时/{{course.info.lessons}}课时&nbsp;&nbsp;&nbsp;&nbsp;难度：{{course.info.get_level_display}}</p>
            <div class="sale-time" v-if="course.info.discount.type">
              <p class="sale-type">{{course.info.discount.type}}</p>
              <p class="expire" v-if="course.info.discount.expire>0">距离结束：仅剩 {{parseInt(course.info.discount.expire/86400)}}天 {{fill0(parseInt(course.info.discount.expire/3600%24))}}小时 {{fill0(parseInt(course.info.discount.expire/60%60))}}分 <span class="second">{{fill0(parseInt(course.info.discount.expire%60))}}</span> 秒</p>
            </div>
            <div class="sale-time" v-if="!course.info.discount.type">
              <p class="sale-type">课程价格 ¥{{parseFloat(course.info.price).toFixed(2)}}</p>
            </div>
            <p class="course-price" v-if="course.info.discount.price">
              <span>活动价</span>
              <span class="discount">¥{{parseFloat(course.info.discount.price).toFixed(2)}}</span>
              <span class="original">¥{{parseFloat(course.info.price).toFixed(2)}}</span>
            </p>
            <div class="buy">
              <div class="buy-btn">
                <button class="buy-now">立即购买</button>
                <button class="free">免费试学</button>
              </div>
              <div class="add-cart"><img src="../assets/cart-yellow.svg" alt="">加入购物车</div>
            </div>
          </div>
        </div>
        <div class="course-tab">
          <ul class="tab-list">
            <li :class="course.tabIndex===1?'active':''" @click="course.tabIndex=1">详情介绍</li>
            <li :class="course.tabIndex===2?'active':''" @click="course.tabIndex=2">课程章节 <span :class="course.tabIndex!==2?'free':''">(试学)</span></li>
            <li :class="course.tabIndex===3?'active':''" @click="course.tabIndex=3">用户评论 (42)</li>
            <li :class="course.tabIndex===4?'active':''" @click="course.tabIndex=4">常见问题</li>
          </ul>
        </div>
        <div class="course-content">
          <div class="course-tab-list">
            <div class="tab-item" v-if="course.tabIndex===1" v-html="course.info.description">

            </div>
            <div class="tab-item" v-if="course.tabIndex===2">
              <div class="tab-item-title">
                <p class="chapter">课程章节</p>
                <p class="chapter-length">共11章 147个课时</p>
              </div>
              <div class="chapter-item">
                <p class="chapter-title"><img src="../assets/1.svg" alt="">第1章·Linux硬件基础</p>
                <ul class="lesson-list">
                  <li class="lesson-item">
                    <p class="name"><span class="index">1-1</span> 课程介绍-学习流程<span class="free">免费</span></p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即试学</button>
                  </li>
                  <li class="lesson-item">
                    <p class="name"><span class="index">1-2</span> 服务器硬件-详解<span class="free">免费</span></p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即试学</button>
                  </li>
                </ul>
              </div>
              <div class="chapter-item">
                <p class="chapter-title"><img src="../assets/1.svg" alt="">第2章·Linux发展过程</p>
                <ul class="lesson-list">
                  <li class="lesson-item">
                    <p class="name"><span class="index">2-1</span> 操作系统组成-Linux发展过程</p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即购买</button>
                  </li>
                  <li class="lesson-item">
                    <p class="name"><span class="index">2-2</span> 自由软件-GNU-GPL核心讲解</p>
                    <p class="time">07:30 <img src="../assets/chapter-player.svg"></p>
                    <button class="try">立即购买</button>
                  </li>
                </ul>
              </div>
            </div>
            <div class="tab-item" v-if="course.tabIndex===3">
              用户评论
            </div>
            <div class="tab-item" v-if="course.tabIndex===4">
              常见问题
            </div>
          </div>
          <div class="course-side">
             <div class="teacher-info">
               <h4 class="side-title"><span>授课老师</span></h4>
               <div class="teacher-content">
                 <div class="cont1">
                   <img :src="course.info.teacher.avatar">
                   <div class="name">
                     <p class="teacher-name">{{course.info.teacher.name}}</p>
                     <p class="teacher-title">{{course.info.teacher.get_role_display}}，{{course.info.teacher.title}}</p>
                   </div>
                 </div>
                 <div class="narrative" v-html="course.info.teacher.brief"></div>
               </div>
             </div>
          </div>
        </div>
      </div>
      <Footer/>
    </div>
</template>

<script setup>
import {reactive,ref, watch} from "vue"
import {useRoute, useRouter} from "vue-router"
import Header from "../components/Header.vue"
import Footer from "../components/Footer.vue"
import { AliPlayerV3 } from "vue-aliplayer-v3"
import course from "../api/course"
import { ElMessage } from 'element-plus'
import {fill0} from "../utils/func";

let route = useRoute()
let router= useRouter()
let player = ref(null)

// 获取url地址栏上的课程ID
course.course_id = route.params.id;

// 简单判断课程ID是否合法
if(course.course_id > 0){
  // 根据课程ID到服务端获取课程详情数据
  course.get_course().then(response=>{
    course.info = response.data;
    clearInterval(course.timer);
    course.timer = setInterval(()=>{
      if(course.info.discount.expire && course.info.discount.expire>0){
            course.info.discount.expire--
        }
    },1000);

  }).catch(error=>{
    ElMessage.error({
      message: "非法的URL地址，无法获取课程信息！",
      duration: 1000,
      onClose(){
        router.go(-1)
      }
    })
  })
}else{
    ElMessage.error({
      message: "非法的URL地址，无法获取课程信息！",
      duration: 1000,
      onClose(){
        router.go(-1)
      }
    })
}

// 阿里云播放器的选项参数
const options = reactive({
  // source: "/src/assets/1.mp4",
  // cover: "/src/assets/course-1.png",
  autoplay: false,   // 是否自动播放
  preload: true,     // 是否自动预加载
  isLive: false,     // 切换为直播流的时候必填true
  // format: 'm3u8'  // 切换为直播流的时候必填
})

const onPlay = (event)=>{
  console.log("播放视频");
  console.log(player.value.getCurrentTime());  // 当前视频播放时间
}

const onPause = (event)=>{
  console.log("暂停播放");
  console.log(player.value.getCurrentTime());
}

const onPlaying = (event)=>{
  console.log("播放中");
  console.log(player.value.getCurrentTime());
  console.log(player.value.getDuration());  // 获取视频长度
}

</script>

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 客户端展示课程详情信息"
git push

服务端提供课程对应的章节列表和课时列表信息

courses/models.py，给章节模型新增返回课时列表字段，代码：

class CourseChapter(BaseModel):
    """课程章节"""
    orders = models.SmallIntegerField(default=1, verbose_name="第几章")
    summary = RichTextUploadingField(blank=True, null=True, verbose_name="章节介绍")
    pub_date = models.DateField(auto_now_add=True, verbose_name="发布日期")
    course = models.ForeignKey("Course", related_name='chapter_list', on_delete=models.CASCADE, db_constraint=False, verbose_name="课程名称")

    class Meta:
        db_table = "fg_course_chapter"
        verbose_name = "课程章节"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s-第%s章-%s" % (self.course.name, self.orders, self.name)

    # 自定义字段
    def text(self):
        return self.__str__()
    # admin站点配置排序规则和显示的字段文本提示
    text.short_description = "章节名称"
    text.allow_tags = True
    text.admin_order_field = "orders"


    def get_lesson_list(self):
        """返回当前章节的课时列表"""
        lesson_list = self.lesson_list.filter(is_deleted=False, is_show=True).order_by("orders").all()
        return [{
            "id":lesson.id,
            "name":lesson.name,
            "orders":lesson.orders,
            "duration":lesson.duration,
            "lesson_type":lesson.lesson_type,
            "lesson_link":lesson.lesson_link,
            "free_trail":lesson.free_trail
        } for lesson in lesson_list]

courses.serializers，序列化器，代码：

from .models import CourseChapter
class CourseChapterModelSerializer(serializers.ModelSerializer):
    """课程章节序列化器"""
    class Meta:
        model = CourseChapter
        fields = ["id", "orders", "name", "summary", "get_lesson_list"]

courses/views.py视图，代码：

from .models import CourseChapter
from .serializers import CourseChapterModelSerializer


class CourseChapterListAPIView(ListAPIView):
    """课程章节列表"""
    serializer_class = CourseChapterModelSerializer
    def get_queryset(self):
        """列表页数据"""
        course = int(self.kwargs.get("course", 0))
        try:
            ret = Course.objects.filter(pk=course).all()
        except:
            return []
        queryset = CourseChapter.objects.filter(course=course,is_show=True, is_deleted=False).order_by("orders", "id")
        return queryset.all()

courses.urls，路由，代码：

urlpatterns = [
    # 。。。。
    re_path("^(?P<course>\d+)/chapters/$", views.CourseChapterListAPIView.as_view()),
]

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 服务端提供课程对应的章节列表和课时列表信息"
git push

客户端请求章节信息展示到页面中

src/api/course.js，代码：

import http from "../utils/http";
import {reactive, ref} from "vue"


const course = reactive({
    // 中间代码省略....
    chapter_list: [], // 课程章节列表
    // 中间代码省略....
    get_course_chapters(){
        // 获取指定课程的章节列表
        return http.get(`/courses/${this.course_id}/chapters`)
    }
})

export default course;

views/Info.vue，代码：

<div class="tab-item" v-if="course.tabIndex===2">
              <div class="tab-item-title">
                <p class="chapter">课程章节</p>
                <p class="chapter-length">共{{course.chapter_list.length}}章 {{course.info.lessons}}个课时</p>
              </div>
              <div class="chapter-item" v-for="chapter in course.chapter_list">
                <p class="chapter-title"><img src="../assets/1.svg" alt="">第{{chapter.orders}}章·{{chapter.name}}</p>
                <div class="chapter-title" style="padding-left: 2.4rem;" v-if="chapter.summary" v-html="chapter.summary"></div>
                <ul class="lesson-list">
                  <li class="lesson-item" v-for="lesson in chapter.get_lesson_list">
                    <p class="name">
                      <span class="index">{{chapter.orders}}-{{lesson.orders}}</span>
                      {{lesson.name}}
                      <span class="free" v-if="lesson.free_trail">免费</span>
                    </p>
                    <p class="time">{{lesson.duration}} <img src="../assets/chapter-player.svg"></p>
                    <button class="try"  v-if="lesson.free_trail">立即试学</button>
                    <button class="try" v-else>购买课程</button>
                  </li>
                </ul>
              </div>
            </div>

<script setup>
import {reactive,ref, watch} from "vue"
import {useRoute, useRouter} from "vue-router"
import Header from "../components/Header.vue"
import Footer from "../components/Footer.vue"
import { AliPlayerV3 } from "vue-aliplayer-v3"
import course from "../api/course"
import { ElMessage } from 'element-plus'
import {fill0} from "../utils/func";

let route = useRoute()
let router= useRouter()
let player = ref(null)

// 获取url地址栏上的课程ID
course.course_id = route.params.id;


// 简单判断课程ID是否合法
if(course.course_id > 0){
  // 根据课程ID到服务端获取课程详情数据
  course.get_course().then(response=> {
    course.info = response.data;
    clearInterval(course.timer);
    course.timer = setInterval(() => {
      if (course.info.discount.expire && course.info.discount.expire > 0) {
        course.info.discount.expire--
      }
    }, 1000);
  }).catch(error=>{
    ElMessage.error({
      message: "非法的URL地址，无法获取课程信息！",
      duration: 1000,
      onClose(){
        router.go(-1);
      }
    })
  })

  // 获取课程章节信息
  course.get_course_chapters().then(response=>{
    course.chapter_list = response.data
  })

}else{
    ElMessage.error({
      message: "非法的URL地址，无法获取课程信息！",
      duration: 1000,
      onClose(){
        router.go(-1)
      }
    })
}


// 阿里云播放器的选项参数
const options = reactive({
  // source: "/src/assets/1.mp4",
  // cover: "/src/assets/course-1.png",
  autoplay: false,   // 是否自动播放
  preload: true,     // 是否自动预加载
  isLive: false,     // 切换为直播流的时候必填true
  // format: 'm3u8'  // 切换为直播流的时候必填
})

const onPlay = (event)=>{
  console.log("播放视频");
  console.log(player.value.getCurrentTime());  // 当前视频播放时间
}

const onPause = (event)=>{
  console.log("暂停播放");
  console.log(player.value.getCurrentTime());
}

const onPlaying = (event)=>{
  console.log("播放中");
  console.log(player.value.getCurrentTime());
  console.log(player.value.getDuration());  // 获取视频长度
}

</script>

服务端课程详情信息接口新增返回试学的判断状态。

courses.models，代码：

class Course(BaseModel):
    course_type = (
        (0, '付费购买'),
        (1, '会员专享'),
        (2, '学位课程'),
    )
    level_choices = (
        (0, '初级'),
        (1, '中级'),
        (2, '高级'),
    )
    status_choices = (
        (0, '上线'),
        (1, '下线'),
        (2, '预上线'),
    )
    # course_cover = models.ImageField(upload_to="course/cover", max_length=255, verbose_name="封面图片", blank=True, null=True)
    course_cover = StdImageField(variations={
        'thumb_1080x608': (1080, 608),   # 高清图
        'thumb_540x304': (540, 304),    # 中等比例,
        'thumb_108x61': (108, 61, True),  # 小图(第三个参数表示保持图片质量),
    }, max_length=255, delete_orphans=True, upload_to="course/cover", null=True, verbose_name="封面图片",blank=True)

    course_video = models.FileField(upload_to="course/video", max_length=255, verbose_name="封面视频", blank=True, null=True)
    course_type = models.SmallIntegerField(choices=course_type,default=0, verbose_name="付费类型")
    level = models.SmallIntegerField(choices=level_choices, default=1, verbose_name="难度等级")
    description = RichTextUploadingField(null=True, blank=True, verbose_name="详情介绍")
    pub_date = models.DateField(auto_now_add=True, verbose_name="发布日期")
    period = models.IntegerField(default=7, verbose_name="建议学习周期(day)")
    attachment_path = models.FileField(max_length=1000, blank=True, null=True, verbose_name="课件路径")
    attachment_link = models.CharField(max_length=1000, blank=True, null=True, verbose_name="课件链接")
    status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="课程状态")
    students = models.IntegerField(default=0, verbose_name="学习人数")
    lessons = models.IntegerField(default=0, verbose_name="总课时数量")
    pub_lessons = models.IntegerField(default=0, verbose_name="已更新课时数量")
    price = models.DecimalField(max_digits=10,decimal_places=2, verbose_name="课程原价",default=0)
    recomment_home_hot = models.BooleanField(default=False, verbose_name="是否推荐到首页新课栏目")
    recomment_home_top = models.BooleanField(default=False, verbose_name="是否推荐到首页必学栏目")
    direction = models.ForeignKey("CourseDirection", related_name="course_list", on_delete=models.DO_NOTHING, null=True, blank=True, db_constraint=False, verbose_name="学习方向")
    category = models.ForeignKey("CourseCategory", related_name="course_list", on_delete=models.DO_NOTHING, null=True, blank=True, db_constraint=False, verbose_name="课程分类")
    teacher = models.ForeignKey("Teacher", related_name="course_list", on_delete=models.DO_NOTHING, null=True, blank=True, db_constraint=False, verbose_name="授课老师")

    class Meta:
        db_table = "fg_course_info"
        verbose_name = "课程信息"
        verbose_name_plural = verbose_name

    def __str__(self):
        return "%s" % self.name

    def course_cover_small(self):
        if self.course_cover:
            return mark_safe(f'<img style="border-radius: 0%;" src="{self.course_cover.thumb_108x61.url}">')
        return ""

    course_cover_small.short_description = "封面图片(108x61)"
    course_cover_small.allow_tags = True
    course_cover_small.admin_order_field = "course_cover"

    def course_cover_medium(self):
        if self.course_cover:
            return mark_safe(f'<img style="border-radius: 0%;" src="{self.course_cover.thumb_540x304.url}">')
        return ""

    course_cover_medium.short_description = "封面图片(540x304)"
    course_cover_medium.allow_tags = True
    course_cover_medium.admin_order_field = "course_cover"

    def course_cover_large(self):
        if self.course_cover:
            return mark_safe(f'<img style="border-radius: 0%;" src="{self.course_cover.thumb_1080x608.url}">')
        return ""

    course_cover_large.short_description = "封面图片(1080x608)"
    course_cover_large.allow_tags = True
    course_cover_large.admin_order_field = "course_cover"

    @property
    def discount(self):
        # todo 将来通过计算获取当前课程的折扣优惠相关的信息
        import random
        return {
            "type": ["限时优惠","限时减免"].pop(random.randint(0,1)), # 优惠类型
            "expire": random.randint(100000, 1200000),  #  优惠倒计时
            "price": float(self.price - random.randint(1,10) * 10),  # 优惠价格
        }

    def discount_json(self):
        # 必须转成字符串才能保存到es中。所以该方法提供给es使用的。
        return json.dumps(self.discount)


    @property
    def can_free_study(self):
        """是否允许试学"""
        lesson_list = self.lesson_list.filter(is_deleted=False, is_show=True).order_by("orders").all()
        return len(lesson_list) > 0

courses/serializers.py，代码：

class CourseRetrieveModelSerializer(serializers.ModelSerializer):
    """课程详情的序列化器"""
    diretion_name = serializers.CharField(source="diretion.name")
    # diretion = serializers.SlugRelatedField(read_only=True, slug_field='name')
    category_name = serializers.CharField(source="category.name")
    # 序列化器嵌套
    teacher = CourseTearchModelSerializer()

    class Meta:
        model = Course
        fields = [
            "name", "course_cover", "course_video", "level", "get_level_display",
            "description", "pub_date", "status", "get_status_display", "students","discount",
            "lessons", "pub_lessons", "price", "diretion", "diretion_name", "category", "category_name", "teacher","can_free_study"
        ]

客户端直接根据con_free_study来判断是否显示试学。

views/Info.vue，代码：

          <ul class="tab-list">
            <li :class="state.tabIndex===1?'active':''" @click="state.tabIndex=1">详情介绍</li>
            <li :class="state.tabIndex===2?'active':''" @click="state.tabIndex=2">课程章节 <span :class="state.tabIndex!==2?'free':''" v-if="course.con_free_study">(试学)</span></li>
            <li :class="state.tabIndex===3?'active':''" @click="state.tabIndex=3">用户评论 (42)</li>
            <li :class="state.tabIndex===4?'active':''" @click="state.tabIndex=4">常见问题</li>
          </ul>

后台添加模拟数据。

INSERT INTO luffycity.fg_course_chapter (id, name, is_deleted, is_show, created_time, updated_time, orders, summary, pub_date, course_id) VALUES (1, 'Typescript快速入门', 0, 1, '2022-03-21 05:39:39.925451', '2022-03-21 05:39:39.925775', 1, '<p>Typescript快速入门的相关概念以及基本安装和基本使用</p>', '2022-03-21', 1);
INSERT INTO luffycity.fg_course_chapter (id, name, is_deleted, is_show, created_time, updated_time, orders, summary, pub_date, course_id) VALUES (2, 'Typescript的基本语法', 0, 1, '2022-03-21 05:40:38.672697', '2022-03-21 05:40:38.672749', 1, '<p>注释、数据类型、类型注解、函数、面向对象语法、泛型等</p>', '2022-03-21', 1);

INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (1, 'Typescript基本介绍', 0, 1, '2022-03-21 05:41:47.975350', '2022-03-21 05:41:47.975495', 1, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '5:00', '2022-03-21 05:41:47.975554', 1, 1, 1, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (2, 'Typescript与javascript的关系', 0, 1, '2022-03-21 05:42:13.059002', '2022-03-21 05:42:13.059077', 2, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '3:00', '2022-03-21 05:42:13.059128', 1, 1, 1, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (3, 'Typescript基本安装', 0, 1, '2022-03-21 05:42:29.797695', '2022-03-21 05:42:29.797750', 3, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '10:00', '2022-03-21 05:42:29.797796', 1, 1, 1, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (4, 'Typescript快速使用', 0, 1, '2022-03-21 05:42:43.776543', '2022-03-21 05:42:43.776618', 4, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '10:00', '2022-03-21 05:42:43.776672', 1, 1, 1, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (5, 'Typescript的解释器基本使用', 0, 1, '2022-03-21 05:43:07.315028', '2022-03-21 05:43:07.315092', 5, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '10:00', '2022-03-21 05:43:07.315150', 1, 1, 1, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (6, 'Typescript的注释写法', 0, 1, '2022-03-21 05:43:43.696556', '2022-03-21 05:43:43.696611', 1, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '4:00', '2022-03-21 05:43:43.696656', 1, 0, 2, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (7, 'Typescript的变量声明', 0, 1, '2022-03-21 05:44:06.271049', '2022-03-21 05:44:06.271109', 2, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '4:00', '2022-03-21 05:44:06.271160', 1, 0, 2, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (8, 'Typescript的类型注解', 0, 1, '2022-03-21 05:44:17.103618', '2022-03-21 05:44:17.103717', 3, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '4:00', '2022-03-21 05:44:17.103765', 1, 0, 2, 1);
INSERT INTO luffycity.fg_course_lesson (id, name, is_deleted, is_show, created_time, updated_time, orders, lesson_type, lesson_link, duration, pub_date, free_trail, recomment, chapter_id, course_id) VALUES (9, 'Typescript的函数声明', 0, 1, '2022-03-21 05:44:44.347650', '2022-03-21 05:44:44.347716', 4, 2, 'https://luffycityoline.oss-cn-beijing.aliyuncs.com/uploads/course/video/1.mp4', '4:00', '2022-03-21 05:44:44.347764', 1, 0, 2, 1);

提交代码版本

cd /home/moluo/Desktop/luffycity/
git add .
git commit -m "feature: 客户端请求章节信息展示到页面中"
git push