Day 88 免费课 课程列表页

1.分页功能

1.1后端代码: view.py

实现思路:导入分页器,定义分页类,默认分页参数,在视图里面定义 关键字 pagination_class

from rest_framework.pagination import PageNumberPagination

class StandardPageNumberPagination(PageNumberPagination):
    page_size_query_param = 'page_size'
    max_page_size = 10
    page_size = 1 

class CourseAPIView(ListAPIView):
    queryset = Course.objects.filter(status=0).order_by("-orders","-students")
    # 设置过滤的字段
    filter_fields = ('course_category',)
    serializer_class = CourseSerializer
    filter_backends = [OrderingFilter]
    ordering_fields = ('id', 'students', 'price', 'course_category')
    pagination_class = StandardPageNumberPagination

1.2 前端courese.vue 代码

实现思路:

1)引入element ui 分页,默认初始化页面 axios 访问后端,拿到数据

<template>
  <div class="course">
    <Header/>
    <div class="main">
      <!-- 筛选功能 -->
      <div class="top">
        ....
      <!-- 课程列表 --->
      <div class="list">
        。。。。
      </div>
    /*********** 分页器 ***********/ <div class="pagination"> <!-- 必须设置page-size属性,total值的改变才会有效果 --> <el-pagination @current-change="handleCurrentChange" :current-page="query_params.current_page" background layout="prev, pager, next" :page-size="course_page_size" // 后端默认,前端可以重新定义 :total="course_count"> // 总数据数目数量 </el-pagination> </div>
    / ************** 分页器 **************/
</div> <Footer/> </div> </template> <script> import Header from "./common/Header" import Footer from "./common/Footer" export default { name: "Course", data(){ return { catetory_list:[], course_list:[], course_count: 0, course_page_size:1, query_params:{ course_category: 0, ordering:"-id", // 默认排序 current_page: 1, // 当前页 } } }, watch:{ // 每次点击不同课程时,要重新获取课程列表 "query_params.course_category":function(){ this.get_course_list(); // 当切换分类的时候,重置页码 this.query_params.current_page = 1; }, "query_params.ordering":function(){ // 当切换排序条件的时候,重置页码 // this.query_params.current_page = 1; this.get_course_list(); }, "query_params.current_page":function(){ this.get_course_list(); } }, components: {Header, Footer}, created(){ // 获取课程分类 this.$axios.get(this.$settings.Host+"/courses/cate/").then(response=>{ this.catetory_list = response.data }).catch(error=>{ console.log(error.response) }); // 获取课程信息 this.get_course_list() }, methods:{ select_ordering(selector){ // 默认排序 if(this.query_params.ordering==('-'+selector) ){ this.query_params.ordering = selector; }else{ this.query_params.ordering = '-'+selector; } }, get_course_list(){ let query_params = { ordering:this.query_params.ordering, page:this.query_params.current_page, }; if( this.query_params.course_category != 0 ){ query_params.course_category = this.query_params.course_category; } this.$axios.get(this.$settings.Host+"/courses/list/",{ params: query_params }).then(response=>{ // 课程列表 this.course_list = response.data.results; // 课程总数量 this.course_count = response.data.count; }).catch(error=>{ console.log(error.response) }); }, handleCurrentChange(page){ // 页码发生改变 this.query_params.current_page = page; } } } </script> <style scoped> ... .pagination{ text-align: center; margin: 20px 0px 50px 0px; } </style>

 

2.课程详情页

2.1CKEditor富文本编辑器

富文本即具备丰富样式格式的文本。在运营后台,运营人员需要录入课程的相关描述,可以是包含了HTML语法格式的字符串。为了快速简单的让用户能够在页面中编辑带html格式的文本,我们引入富文本编辑器。

富文本编辑器:ueditor、ckeditor、kindeditor

2.1.1. 安装

pip install django-ckeditor

2. 添加应用

在INSTALLED_APPS中添加

INSTALLED_APPS = [
    ...
    'ckeditor',  # 富文本编辑器
    'ckeditor_uploader',  # 富文本编辑器上传图片模块
    ...
]

3. 添加CKEditor设置

在settings/dev.py中添加

# 富文本编辑器ckeditor配置
CKEDITOR_CONFIGS = {
    'default': {
        'toolbar': 'full',  # 工具条功能
        'height': 300,      # 编辑器高度
        # 'width': 300,     # 编辑器宽
    },
}
CKEDITOR_UPLOAD_PATH = ''  # 上传图片保存路径,留空则调用django的文件上传功能

4. 添加ckeditor路由

在总路由中添加

path(r'^ckeditor/', include('ckeditor_uploader.urls')),

5. 为模型类添加字段

ckeditor提供了两种类型的Django模型类字段

  • ckeditor.fields.RichTextField 不支持上传文件的富文本字段

  • ckeditor_uploader.fields.RichTextUploadingField 支持上传文件的富文本字段\

修改course/models.py里面的字段信息,记得要重新数据迁移

from ckeditor_uploader.fields import RichTextUploadingField
class Course(models.Model):
    """
    专题课程
    """
    ...
    
    brief = RichTextUploadingField(max_length=2048, verbose_name="课程概述", null=True, blank=True)

 

 

3.课程详情页显示

因为接下来的组件中使用了vue-video视频播放组件,所以我们需要先预安装。

3.1安装依赖

npm install vue-video-player --save

3.2 在main.js中注册加载组件

require('video.js/dist/video-js.css');
require('vue-video-player/src/custom-theme.css');
import VideoPlayer from 'vue-video-player'
Vue.use(VideoPlayer);

3.3 Detail.vue组件代码:

<template>
    <div class="detail">
      <Header/>
      <div class="main">
        <div class="course-info">
          <div class="wrap-left">
            <video-player class="video-player vjs-custom-skin"
               ref="videoPlayer"
               :playsinline="true"
               :options="playerOptions"
               @play="onPlayerPlay($event)"
               @pause="onPlayerPause($event)"
            >
            </video-player>
          </div>
          <div class="wrap-right">
            <h3 class="course-name">{{course.name}}</h3>
            <p class="data">{{course.students}}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长:{{course.lessons}}课时/{{course.lessons==course.pub_lessons?'更新完成':('已更新'+course.pub_lessons+"课程")}}&nbsp;&nbsp;&nbsp;&nbsp;难度:{{course.level}}</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">¥{{course.price}}</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="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
            <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span :class="tabIndex!=2?'free':''">(试学)</span></li>
            <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论 (42)</li>
            <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
          </ul>
        </div>
        <div class="course-content">
          <div class="course-tab-list">
            <div class="tab-item" v-if="tabIndex==1">
              <div v-html="course.brief"></div>
            </div>
            <div class="tab-item" v-if="tabIndex==2">
              <div class="tab-item-title">
                <p class="chapter">课程章节</p>
                <p class="chapter-length">共{{chapter_list.length}}章 147个课时</p>
              </div>
              <div class="chapter-item" v-for="chapter in chapter_list">
                <p class="chapter-title"><img src="@/assets/1.svg" alt="">第{{chapter.chapter}}章·{{chapter.name}}</p>
                <ul class="lesson-list">
                  <li class="lesson-item" v-for="lesson in chapter.coursesections">
                    <p class="name"><span class="index">{{chapter.chapter}}-{{lesson.id}}</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>立即购买</button>
                  </li>

                </ul>
              </div>
            </div>
            <div class="tab-item" v-if="tabIndex==3">
              用户评论
            </div>
            <div class="tab-item" v-if="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.teacher.image">
                   <div class="name">
                     <p class="teacher-name">{{course.teacher.name}} {{course.teacher.title}}</p>
                     <p class="teacher-title">{{course.teacher.signature}}</p>
                   </div>
                 </div>
                 <p class="narrative" >Linux运维技术专家,老男孩Linux金牌讲师,讲课风趣幽默、深入浅出、声音洪亮到爆炸</p>
               </div>
             </div>
          </div>
        </div>
      </div>
      <Footer/>
    </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"

import {videoPlayer} from 'vue-video-player';

export default {
    name: "Detail",
    data(){
      return {
        tabIndex:1,  // 当前选项卡显示的下标
        course_id:0, // 当前页面对应的课程ID
        course: {
            teacher: {},
        },  // 课程详情信息
        chapter_list:{},
        playerOptions: {
          playbackRates: [0.7, 1.0, 1.5, 2.0], // 播放速度
          autoplay: false, //如果true,则自动播放
          muted: false, // 默认情况下将会消除任何音频。
          loop: false, // 循环播放
          preload: 'auto',  // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频(如果浏览器支持)
          language: 'zh-CN',
          aspectRatio: '16:9', // 将播放器置于流畅模式,并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字(例如"16:9""4:3")
          fluid: true, // 当true时,Video.js player将拥有流体大小。换句话说,它将按比例缩放以适应其容器。
          sources: [{ // 播放资源和资源格式
            type: "video/mp4",
            src: "http://img.ksbbs.com/asset/Mon_1703/05cacb4e02f9d9e.mp4" //你的视频地址(必填)
          }],
          poster: "../static/courses/675076.jpeg", //视频封面图
          width: document.documentElement.clientWidth, // 默认视频全屏时的最大宽度
          notSupportedMessage: '此视频暂无法播放,请稍后再试', //允许覆盖Video.js无法播放媒体源时显示的默认信息。
        }
      }
    },
    watch:{
      course(data){
        while(data.brief.search(`"/media`) != -1 ){
          data.brief = data.brief.replace(`"/media`,`"${this.$settings.Host}/media`)
        }
      },
      tabIndex(data){
        if(data==2){
          //获取当前课程对应的章节列表和课时列表
          this.$axios.get(`${this.$settings.Host}/courses/chapters/?course=${this.course_id}`).then(response=>{
            this.chapter_list = response.data;
          }).catch(error=>{
            console.log(error.response)
          })
        }
      }
    },
    created(){
      // 获取当前课程ID
      this.course_id = this.$route.query.id - 0;
      // 判断ID基本有效性
      let _this = this;
      if( isNaN(this.course_id) || this.course_id < 1 ){
        _this.$alert("无效的课程ID!","错误",{
          callback(){
            _this.$router.go(-1);
          }});
      }
      // 发送请求获取后端课程数据
      this.$axios.get(this.$settings.Host+`/courses/detail/${this.course_id}/`).then(response=>{
        this.course = response.data;
        // 修改视频中的封面图片
        this.playerOptions.poster = this.course.course_img;
      }).catch(error=>{
        console.log(error.response)
      });


    },
    methods: {
      // 视频播放事件
      onPlayerPlay(player) {
        alert("play");
      },
      // 视频暂停播放事件
      onPlayerPause(player){
        alert("pause");
      },
      // 视频插件初始化
      player() {
        return this.$refs.videoPlayer.player;
      }
    },
    components:{
      Header,
      Footer,
      videoPlayer,
    }
}
</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>
View Code

3.4 注册路由

routers/index.js

import CourseDetail from "../components/CourseDetail"

    ,{
      name:"CourseDetail",
      path: "/detail",
      component: CourseDetail,
    }

3.5 完善从课程列表跳转到课程详情的链接

<p class="box-title"><router-link :to="{path: '/detail',query:{id:course.id}}">{{course.name}}</router-link></p>

3.6 CourseDetail.vue:104行,接受来自课程列表的课程ID, 代码:

  mounted(){
    // 获取地址上面的课程ID
    let id = this.$route.query.id - 0;
    console.log(id);
    if( isNaN(id) || id < 1 ){
      alert("非法请求!")
      this.$router.go(-1);
    }
  }

3.7 后端提供课程详情页数据接口

3.7.1 序列化器代码:(采用序列化器嵌套)

# 默认情况,序列化器转换模型数据时,默认会把外键直接转成主键ID值
# 所以我们需要重新设置在序列化器中针对外键的序列化
# 这种操作就是一个序列器里面调用另一个序列化器了.叫"序列化器嵌套"

class TeacherDetailModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = Teacher
        fields = ("id","name","title","role","signature","image","brief")


class CourseDetailModelSerializer(serializers.ModelSerializer):
    """课程详情页的序列化器"""
    teacher = TeacherDetailModelSerializer()
    class Meta:
        model = Course
        fields = ("id","name","course_img","students","lessons","pub_lessons","price","teacher","course_level","brief")

3.7.2 视图代码: 这里采用retrieveAPIView,获取单个

from rest_framework.generics import RetrieveAPIView
from .serializers import CourseDetailModelSerializer
class CourseDeitalAPIView(RetrieveAPIView):
    """课程详情信息"""
    queryset = Course.objects.filter(is_delete=False, is_show=True).order_by("orders")
    serializer_class = CourseDetailModelSerializer

3.7.3 路由代码

from django.urls import path, re_path
from . import views
urlpatterns = [
    re_path(r"detail/(?P<pk>\d+)",views.CourseDetailAPIView.as_view())
]

 

3.8 前端请求api接口并显示数据

<template>
    <div class="detail">
      <Header/>
      <div class="main">
        <div class="course-info">
          <div class="wrap-left">
            <video-player class="video-player vjs-custom-skin"
               ref="videoPlayer"
               :playsinline="true"
               :options="playerOptions"
               @play="onPlayerPlay($event)"
               @pause="onPlayerPause($event)"
            >
            </video-player>
          </div>
          <div class="wrap-right">
            <h3 class="course-name">{{course.name}}</h3>
            <p class="data">{{course.students}}人在学&nbsp;&nbsp;&nbsp;&nbsp;课程总时长:{{course.lessons}}课时/{{course.lessons==course.pub_lessons?'更新完成':('已更新'+course.pub_lessons+"课程")}}&nbsp;&nbsp;&nbsp;&nbsp;难度:{{course.course_level}}</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">¥{{course.price}}</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="tabIndex==1?'active':''" @click="tabIndex=1">详情介绍</li>
            <li :class="tabIndex==2?'active':''" @click="tabIndex=2">课程章节 <span :class="tabIndex!=2?'free':''">(试学)</span></li>
            <li :class="tabIndex==3?'active':''" @click="tabIndex=3">用户评论 (42)</li>
            <li :class="tabIndex==4?'active':''" @click="tabIndex=4">常见问题</li>
          </ul>
        </div>
        <div class="course-content">
          <div class="course-tab-list">
            <div class="tab-item" v-if="tabIndex==1">
              <div v-html="course.brief"></div>
            </div>
            <div class="tab-item" v-if="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="tabIndex==3">
              用户评论
            </div>
            <div class="tab-item" v-if="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.teacher.image">
                   <div class="name">
                     <p class="teacher-name">{{course.teacher.name}} {{course.teacher.title}}</p>
                     <p class="teacher-title">{{course.teacher.signature}}</p>
                   </div>
                 </div>
                 <p class="narrative" >Linux运维技术专家,老男孩Linux金牌讲师,讲课风趣幽默、深入浅出、声音洪亮到爆炸</p>
               </div>
             </div>
          </div>
        </div>
      </div>
      <Footer/>
    </div>
</template>

<script>
import Header from "./common/Header"
import Footer from "./common/Footer"

import {videoPlayer} from 'vue-video-player';

export default {
    name: "Detail",
    data(){
      return {
        tabIndex:1,  // 当前选项卡显示的下标
        course_id:0, // 当前页面对应的课程ID
        course: {
            teacher: {},
        },  // 课程详情信息
        playerOptions: {
          playbackRates: [0.7, 1.0, 1.5, 2.0], // 播放速度
          autoplay: false, //如果true,则自动播放
          muted: false, // 默认情况下将会消除任何音频。
          loop: false, // 循环播放
          preload: 'auto',  // 建议浏览器在<video>加载元素后是否应该开始下载视频数据。auto浏览器选择最佳行为,立即开始加载视频(如果浏览器支持)
          language: 'zh-CN',
          aspectRatio: '16:9', // 将播放器置于流畅模式,并在计算播放器的动态大小时使用该值。值应该代表一个比例 - 用冒号分隔的两个数字(例如"16:9""4:3")
          fluid: true, // 当true时,Video.js player将拥有流体大小。换句话说,它将按比例缩放以适应其容器。
          sources: [{ // 播放资源和资源格式
            type: "video/mp4",
            src: "http://img.ksbbs.com/asset/Mon_1703/05cacb4e02f9d9e.mp4" //你的视频地址(必填)
          }],
          poster: "../static/courses/675076.jpeg", //视频封面图
          width: document.documentElement.clientWidth, // 默认视频全屏时的最大宽度
          notSupportedMessage: '此视频暂无法播放,请稍后再试', //允许覆盖Video.js无法播放媒体源时显示的默认信息。
        }
      }
    },
    watch:{
      course(data){
        while(data.brief.search(`"/media`) != -1 ){
          data.brief = data.brief.replace(`"/media`,`"${this.$settings.Host}/media`)
        }
      },
      tabIndex(){
        if(tabIndex==2){
          //获取当前课程对应的章节列表和课时列表
          
        }
      }
    },
    created(){
      // 获取当前课程ID
      this.course_id = this.$route.query.id - 0;
      // 判断ID基本有效性
      let _this = this;
      if( isNaN(this.course_id) || this.course_id < 1 ){
        _this.$alert("无效的课程ID!","错误",{
          callback(){
            _this.$router.go(-1);
          }});
      }
      // 发送请求获取后端课程数据
      this.$axios.get(this.$settings.Host+`/courses/detail/${this.course_id}/`).then(response=>{
        this.course = response.data;
        // 修改视频中的封面图片
        this.playerOptions.poster = this.course.course_img;
      }).catch(error=>{
        console.log(error.response)
      });


    },
    methods: {
      // 视频播放事件
      onPlayerPlay(player) {
        alert("play");
      },
      // 视频暂停播放事件
      onPlayerPause(player){
        alert("pause");
      },
      // 视频插件初始化
      player() {
        return this.$refs.videoPlayer.player;
      }
    },
    components:{
      Header,
      Footer,
      videoPlayer,
    }
}
</script>
View Code

3.9 后端提供当前课程对应的章节和课时列表信息

3.9.1 courses/serializers.py,序列化器,代码:

from .models import CourseLesson
class CourseLessonModelSerializer(serializers.ModelSerializer):
    """课程课时"""
    class Meta:
        model = CourseLesson
        fields = ["id","name","duration","free_trail"]

from .models import CourseChapter
class CourseChapterModelSerializer(serializers.ModelSerializer):
    """课程章节"""
    coursesections = CourseLessonModelSerializer(many=True)
    class Meta:
        model = CourseChapter
        fields = ("id","name","coursesections","chapter")

3.9.2 courses/views.py视图,代码:

from rest_framework.generics import ListAPIView
from .serializers import CourseChapterModelSerializer
from .models import CourseChapter
class CourseChapterAPIView(ListAPIView):
    """课程章节信息"""
    queryset = CourseChapter.objects.filter(is_delete=False, is_show=True).order_by("orders")
    serializer_class = CourseChapterModelSerializer
    filter_backends = [DjangoFilterBackend]
    filter_fields = ['course']

3.9.3 courses/urls.py路由,代码:

re_path(r"^chapters/$",views.CourseChapterAPIView.as_view()),

 3.9.4前端请求章节信息展示到页面中

前端请求章节信息展示到页面中
View Code

 

posted @ 2019-05-16 15:28  addit  Views(37)  Comments(0)    收藏  举报