1 查询所有课程接口

# 查询所有课程接口
	-带过滤：按分类过滤
    -带排序：价格，学习人数
    -带分页：简单分页

1.1 视图类

class CourseView(GenericViewSet, ListModelMixin):
    queryset = Course.objects.filter(is_delete=False, is_show=True).order_by('orders')
    serializer_class = CourseSerializer
    pagination_class = CommonPagination
    # 排序,过滤课程分类（course_category=2）
    filter_backends = [OrderingFilter, DjangoFilterBackend]
    ordering_fields = ['students', 'price']
    filterset_fields = ['course_category']

1.2 序列化类

class TeacherSerializer(serializers.ModelSerializer):
    class Meta:
        model = Teacher
        fields = ['id', 'name', 'role_name', 'title', 'signature', 'image', 'brief']


# 只用来做序列化
class CourseSerializer(serializers.ModelSerializer):
    teacher = TeacherSerializer() # 子序列化

    class Meta:
        model = Course
        fields = [
            'id',
            'name',
            'course_img',
            'brief',
            'attachment_path',  # 课件地址
            'pub_sections',  # 发布了多少课时
            'sections',  # 总共有多少
            'price',
            'students',
            'period',  # 建议学习周期

            'course_type_name',  # 课程类型 中文
            'level_name',  # 课程难度等级中文
            'status_name',  # 课程状态中文

            'teacher',  # 重写 返回老师的详情
            'section_list',  # 重写的字段，拿最多四个课时，超过4个就拿4个，不足4个，有几个拿几个
        ]

1.3 表模型

class Course(BaseModel):

    """课程"""
    course_type = (
        (0, '付费'),
        (1, 'VIP专享'),
    )
    level_choices = (
        (0, '初级'),
        (1, '中级'),
        (2, '高级'),
    )
    status_choices = (
        (0, '上线'),
        (1, '下线'),
        (2, '预上线'),
    )
    name = models.CharField(max_length=128, verbose_name="课程名称")
    course_img = models.ImageField(upload_to="courses", max_length=255, verbose_name="封面图片", blank=True, null=True)
    course_type = models.SmallIntegerField(choices=course_type, default=0, verbose_name="付费类型")
    brief = models.TextField(max_length=2048, verbose_name="详情介绍", null=True, blank=True)
    level = models.SmallIntegerField(choices=level_choices, default=0, verbose_name="难度等级")
    pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
    period = models.IntegerField(verbose_name="建议学习周期(day)", default=7)
    attachment_path = models.FileField(upload_to="attachment", max_length=128, verbose_name="课件路径", blank=True,
                                       null=True)
    status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="课程状态")
    students = models.IntegerField(verbose_name="学习人数", default=0)  # 优化字段
    sections = models.IntegerField(verbose_name="总课时数量", default=0)
    pub_sections = models.IntegerField(verbose_name="课时更新数量", default=0)
    price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价", default=0)

    teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, verbose_name="授课老师")
    course_category = models.ForeignKey("CourseCategory", on_delete=models.SET_NULL, db_constraint=False, null=True,
                                        blank=True, verbose_name="课程分类")

    class Meta:
        db_table = "luffy_course"
        verbose_name = "课程"
        verbose_name_plural = "课程"

    def __str__(self):
        return "%s" % self.name
    '''
    因为choice返回到前端的时候是数字显示的，但是django框架中在用choice时会自动给一个get...display转换成数字对应的中文，
    '''
    #如下所示

    def course_type_name(self):
        return self.get_course_type_display()  # 拿到course_type对应的中文

    def level_name(self):
        return self.get_level_display()

    def status_name(self):
        return self.get_status_display()

    def section_list(self):
        l = []
        # 超过4个就拿4个，不足4个，有几个拿几个
        # 根据课程，获取所有章节

        course_chapter_list = self.coursechapters.all()  # 咱们写了related_name，直接按字段名
        # 循环所有章节，拿出所有课时，追加到l中
        for course_chapter in course_chapter_list:
            chapter_section_list = course_chapter.coursesections.all()
            for chapter_section in chapter_section_list:
                l.append({'id': chapter_section.pk,
                          'name': chapter_section.name,
                          'section_link': chapter_section.section_link,
                          'duration': chapter_section.duration,
                          'free_trail': chapter_section.free_trail,
                          })
                # 当l长度大于等于4，就直接返回
                if len(l) >= 4:
                    return l

        return l

2 课程详情接口

# 课间，增加了些数据


# 多种写法
	-方式一：直接在原来查询所有的视图类上加入继承：RetrieveModelMixin
    	-继续使用查询所有的序列化类（没有章节及课时）
        -配合一个通过课程id，查询所有课程章节及课时的接口
        
     -方式二：直接在原来查询所有的视图类上加入继承：RetrieveModelMixin
    	-重写序列化类：返回课程详情，返回课程章节及课时
        
        
# 我们采用方式一：只要在CourseView加继承RetrieveModelMixin类即可，就有查询单条的接口了
class CourseView(GenericViewSet, ListModelMixin,RetrieveModelMixin):

3 课程详情后台之所有章节接口

# 该接口是为了配合 ：课程详情页面写
# 写的接口是查询所有章节及课时
	-需要按照课程id过滤
# 写查询所有章节接口（带过滤）

3.1 视图类

class CourseChapterView(GenericViewSet, ListModelMixin):
    serializer_class = CourseChapterSerializer
    queryset = CourseChapter.objects.filter(is_delete=False, is_show=True).order_by('orders')
    filter_backends = [DjangoFilterBackend]
    filterset_fields = ['course']  # 按课程过滤

3.2 序列化类

class CourseSectionSerializer(serializers.ModelSerializer):
    class Meta:
        model = CourseSection
        fields = ['id', 'name', 'section_type_name',
                  'section_link',
                  'duration',
                  'free_trail',]



class CourseChapterSerializer(serializers.ModelSerializer):
    '''
        拿出章节下所有课时，方案有三种
         -表模型中写
         -序列化类中写
         -方式三子序列化
    coursesections = CourseSectionSerializer(many=True)  # 章节下的课时，是多条，使用子序列化，instance不用传，但是many=True必须传

    class Meta:
        model = CourseChapter
        fields = ['id', 'name', 'chapter', 'summary', 'coursesections']

4 所有课程前台，课程详情前台

# 0 查询所有课程分类接口
# 1 查询所有课程（过滤，排序，分页）
# 2 查询课程详情
# 3 查询所有章节及其下的课时，带按课程id过滤功能
	-配合查询课程详情页面使用的

4.1 课程列表页

<template>
  <div class="course">
    <Header></Header>
    <div class="main">
      <!-- 筛选条件 -->
      <div class="condition">
        <ul class="cate-list">
          <li class="title">课程分类:</li>
          <li :class="filter.course_category==0?'this':''" @click="filter.course_category=0">全部</li>
          <li :class="filter.course_category==category.id?'this':''" v-for="category in category_list"
              @click="filter.course_category=category.id" :key="category.name">{{ category.name }}
          </li>
        </ul>

        <div class="ordering">
          <ul>
            <li class="title">筛&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;选:</li>
            <li class="default" :class="(filter.ordering=='id' || filter.ordering=='-id')?'this':''"
                @click="filter.ordering='-id'">默认
            </li>
            <li class="hot" :class="(filter.ordering=='students' || filter.ordering=='-students')?'this':''"
                @click="filter.ordering=(filter.ordering=='-students'?'students':'-students')">人气
            </li>
            <li class="price"
                :class="filter.ordering=='price'?'price_up this':(filter.ordering=='-price'?'price_down this':'')"
                @click="filter.ordering=(filter.ordering=='-price'?'price':'-price')">价格
            </li>
          </ul>
          <p class="condition-result">共{{ course_total }}个课程</p>
        </div>

      </div>
      <!-- 课程列表 -->
      <div class="course-list">
        <div class="course-item" v-for="course in course_list" :key="course.name">
          <div class="course-image">
            <img :src="course.course_img" alt="">
          </div>
          <div class="course-info">
            <h3>
              <router-link :to="'/course/detail/'+course.id">{{ course.name }}</router-link>
              <span><img src="@/assets/img/avatar1.svg" alt="">{{ course.students }}人已加入学习</span></h3>
            <p class="teather-info">
              {{ course.teacher.name }} {{ course.teacher.title }} {{ course.teacher.signature }}
              <span v-if="course.sections>course.pub_sections">共{{ course.sections }}课时/已更新{{ course.pub_sections }}课时</span>
              <span v-else>共{{ course.sections }}课时/更新完成</span>
            </p>
            <ul class="section-list">
              <li v-for="(section, key) in course.section_list" :key="section.name"><span
                  class="section-title">0{{ key + 1 }}  |  {{ section.name }}</span>
                <span class="free" v-if="section.free_trail">免费</span></li>
            </ul>
            <div class="pay-box">
              <div v-if="course.discount_type">
                <span class="discount-type">{{ course.discount_type }}</span>
                <span class="discount-price">￥{{ course.real_price }}元</span>
                <span class="original-price">原价：{{ course.price }}元</span>
              </div>
              <span v-else class="discount-price">￥{{ course.price }}元</span>
              <span class="buy-now">立即购买</span>
            </div>
          </div>
        </div>
      </div>
      <div class="course_pagination block">
        <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page.sync="filter.page"
            :page-sizes="[3, 5]"
            :page-size="filter.page_size"
            layout="sizes, prev, pager, next"
            :total="course_total">
        </el-pagination>
      </div>
    </div>
    <Footer></Footer>
  </div>
</template>

<script>
import Header from "@/components/Header"
import Footer from "@/components/Footer"

export default {
  name: "Course",
  data() {
    return {
      category_list: [], // 课程分类列表
      course_list: [],   // 课程列表
      course_total: 0,   // 当前课程的总数量
      filter: {
        course_category: 0, // 当前用户选择的课程分类，刚进入页面默认为全部，值为0
        ordering: "-id",    // 数据的排序方式，默认值是-id，表示对于id进行降序排列
        page_size: 3,       // 单页数据量
        page: 1,
      }
    }
  },
  created() {
    this.get_category();
    this.get_course();
  },
  components: {
    Header,
    Footer,
  },
  watch: {
    "filter.course_category": function () {
      this.filter.page = 1;
      this.get_course();
    },
    "filter.ordering": function () {
      this.get_course();
    },
    "filter.page_size": function () {
      this.get_course();
    },
    "filter.page": function () {
      this.get_course();
    }
  },
  methods: {

    handleSizeChange(val) {
      // 每页数据量发生变化时执行的方法
      this.filter.page = 1;
      this.filter.page_size = val;
    },
    handleCurrentChange(val) {
      // 页码发生变化时执行的方法
      this.filter.page = val;
    },
    get_category() {
      // 获取课程分类信息
      this.$axios.get(`${this.$settings.BASE_URL}course/category/`).then(response => {
        if (response.data.code == 100) {
          this.category_list = response.data.data;
          console.log(this.category_list)
        }

      }).catch(() => {
        this.$message({
          message: "获取课程分类信息有误，请联系客服工作人员",
        })
      })
    },
    get_course() {
      // 排序
      let filters = {
        ordering: this.filter.ordering, // 排序
      };
      // 判决是否进行分类课程的展示
      if (this.filter.course_category > 0) {
        filters.course_category = this.filter.course_category;
      }

      // 设置单页数据量
      if (this.filter.page_size > 0) {
        filters.page_size = this.filter.page_size;
      } else {
        filters.page_size = 5;
      }

      // 设置当前页码
      if (this.filter.page > 1) {
        filters.page = this.filter.page;
      } else {
        filters.page = 1;
      }


      // 获取课程列表信息
      this.$axios.get(`${this.$settings.BASE_URL}course/course/`, {
        params: filters
      }).then(response => {
        if (response.data.code == 100) {
          this.course_list = response.data.data.results;
          this.course_total = response.data.data.count;
        }

      }).catch(() => {
        this.$message({
          message: "获取课程信息有误，请联系客服工作人员"
        })
      })
    }
  }
}
</script>

<style scoped>
.course {
  background: #f6f6f6;
}

.course .main {
  width: 1100px;
  margin: 35px auto 0;
}

.course .condition {
  margin-bottom: 35px;
  padding: 25px 30px 25px 20px;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 4px 0 #f0f0f0;
}

.course .cate-list {
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
  padding-bottom: 18px;
  margin-bottom: 17px;
}

.course .cate-list::after {
  content: "";
  display: block;
  clear: both;
}

.course .cate-list li {
  float: left;
  font-size: 16px;
  padding: 6px 15px;
  line-height: 16px;
  margin-left: 14px;
  position: relative;
  transition: all .3s ease;
  cursor: pointer;
  color: #4a4a4a;
  border: 1px solid transparent; /* transparent 透明 */
}

.course .cate-list .title {
  color: #888;
  margin-left: 0;
  letter-spacing: .36px;
  padding: 0;
  line-height: 28px;
}

.course .cate-list .this {
  color: #ffc210;
  border: 1px solid #ffc210 !important;
  border-radius: 30px;
}

.course .ordering::after {
  content: "";
  display: block;
  clear: both;
}

.course .ordering ul {
  float: left;
}

.course .ordering ul::after {
  content: "";
  display: block;
  clear: both;
}

.course .ordering .condition-result {
  float: right;
  font-size: 14px;
  color: #9b9b9b;
  line-height: 28px;
}

.course .ordering ul li {
  float: left;
  padding: 6px 15px;
  line-height: 16px;
  margin-left: 14px;
  position: relative;
  transition: all .3s ease;
  cursor: pointer;
  color: #4a4a4a;
}

.course .ordering .title {
  font-size: 16px;
  color: #888;
  letter-spacing: .36px;
  margin-left: 0;
  padding: 0;
  line-height: 28px;
}

.course .ordering .this {
  color: #ffc210;
}

.course .ordering .price {
  position: relative;
}

.course .ordering .price::before,
.course .ordering .price::after {
  cursor: pointer;
  content: "";
  display: block;
  width: 0px;
  height: 0px;
  border: 5px solid transparent;
  position: absolute;
  right: 0;
}

.course .ordering .price::before {
  border-bottom: 5px solid #aaa;
  margin-bottom: 2px;
  top: 2px;
}

.course .ordering .price::after {
  border-top: 5px solid #aaa;
  bottom: 2px;
}

.course .ordering .price_up::before {
  border-bottom-color: #ffc210;
}

.course .ordering .price_down::after {
  border-top-color: #ffc210;
}

.course .course-item:hover {
  box-shadow: 4px 6px 16px rgba(0, 0, 0, .5);
}

.course .course-item {
  width: 1100px;
  background: #fff;
  padding: 20px 30px 20px 20px;
  margin-bottom: 35px;
  border-radius: 2px;
  cursor: pointer;
  box-shadow: 2px 3px 16px rgba(0, 0, 0, .1);
  /* css3.0 过渡动画 hover 事件操作 */
  transition: all .2s ease;
}

.course .course-item::after {
  content: "";
  display: block;
  clear: both;
}

/* 顶级元素 父级元素  当前元素{} */
.course .course-item .course-image {
  float: left;
  width: 423px;
  height: 210px;
  margin-right: 30px;
}

.course .course-item .course-image img {
  max-width: 100%;
  max-height: 210px;
}

.course .course-item .course-info {
  float: left;
  width: 596px;
}

.course-item .course-info h3 a {
  font-size: 26px;
  color: #333;
  font-weight: normal;
  margin-bottom: 8px;
}

.course-item .course-info h3 span {
  font-size: 14px;
  color: #9b9b9b;
  float: right;
  margin-top: 14px;
}

.course-item .course-info h3 span img {
  width: 11px;
  height: auto;
  margin-right: 7px;
}

.course-item .course-info .teather-info {
  font-size: 14px;
  color: #9b9b9b;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid #333;
  border-bottom-color: rgba(51, 51, 51, .05);
}

.course-item .course-info .teather-info span {
  float: right;
}

.course-item .section-list::after {
  content: "";
  display: block;
  clear: both;
}

.course-item .section-list li {
  float: left;
  width: 44%;
  font-size: 14px;
  color: #666;
  padding-left: 22px;
  /* background: url("路径") 是否平铺 x轴位置 y轴位置 */
  background: url("/src/assets/img/play-icon-gray.svg") no-repeat left 4px;
  margin-bottom: 15px;
}

.course-item .section-list li .section-title {
  /* 以下3句，文本内容过多，会自动隐藏，并显示省略符号 */
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  display: inline-block;
  max-width: 200px;
}

.course-item .section-list li:hover {
  background-image: url("/src/assets/img/play-icon-yellow.svg");
  color: #ffc210;
}

.course-item .section-list li .free {
  width: 34px;
  height: 20px;
  color: #fd7b4d;
  vertical-align: super;
  margin-left: 10px;
  border: 1px solid #fd7b4d;
  border-radius: 2px;
  text-align: center;
  font-size: 13px;
  white-space: nowrap;
}

.course-item .section-list li:hover .free {
  color: #ffc210;
  border-color: #ffc210;
}

.course-item {
  position: relative;
}

.course-item .pay-box {
  position: absolute;
  bottom: 20px;
  width: 600px;
}

.course-item .pay-box::after {
  content: "";
  display: block;
  clear: both;
}

.course-item .pay-box .discount-type {
  padding: 6px 10px;
  font-size: 16px;
  color: #fff;
  text-align: center;
  margin-right: 8px;
  background: #fa6240;
  border: 1px solid #fa6240;
  border-radius: 10px 0 10px 0;
  float: left;
}

.course-item .pay-box .discount-price {
  font-size: 24px;
  color: #fa6240;
  float: left;
}

.course-item .pay-box .original-price {
  text-decoration: line-through;
  font-size: 14px;
  color: #9b9b9b;
  margin-left: 10px;
  float: left;
  margin-top: 10px;
}

.course-item .pay-box .buy-now {
  width: 120px;
  height: 38px;
  background: transparent;
  color: #fa6240;
  font-size: 16px;
  border: 1px solid #fd7b4d;
  border-radius: 3px;
  transition: all .2s ease-in-out;
  float: right;
  text-align: center;
  line-height: 38px;
  position: absolute;
  right: 0;
  bottom: 5px;
}

.course-item .pay-box .buy-now:hover {
  color: #fff;
  background: #ffc210;
  border: 1px solid #ffc210;
}

.course .course_pagination {
  margin-bottom: 60px;
  text-align: center;
}
</style>

4.2 课程详情页面

# 视频播放器，可以使用h5自带的video标签
	-画面比例，清晰度
    -倍速播放
    -静音
    -暂停可以插广告。。。
# 使用第三方：vue-video-player
cnpm install -S vue-core-video-player 

# mian.js
import VueCoreVideoPlayer from 'vue-core-video-player'
//或者
Vue.use(VueCoreVideoPlayer, {
  lang: 'zh-CN'
})

<template>
  <div class="detail">
    <Header/>
    <div class="main">
      <div class="course-info">
        <div class="wrap-left">
          <vue-core-video-player :src="mp4_url"
                                 :muted="true"
                                 :autoplay="false"
                                 title="致命诱惑"
                                 preload="nona"
                                 :loop="true"
                                 controls="auto"
                                 cover='https://img1.wxzxzj.com/vpc-example-cover-your-name-c.png'
                                 @loadedmetadata="onLoaded"
                                 @play="onPlayerPlay"
                                 @pause="onPlayerPause"
          ></vue-core-video-player>
        </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.sections
            }}课时/{{ course_info.pub_sections }}小时&nbsp;&nbsp;&nbsp;&nbsp;难度：{{ course_info.level_name }}</p>
          <div class="sale-time">
            <p class="sale-type">价格 <span class="original_price">¥{{ course_info.price }}</span></p>
            <p class="expire"></p>
          </div>
          <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" @click="add_cart(course_info.id)">-->
            <!--<img src="@/assets/img/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</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 class="course-brief" v-html="course_info.brief_text"></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{{ course_chapters.length }}章 {{ course_info.sections }}个课时</p>
            </div>
            <div class="chapter-item" v-for="chapter in course_chapters" :key="chapter.name">
              <p class="chapter-title"><img src="@/assets/img/enum.svg"
                                            alt="">第{{ chapter.chapter }}章·{{ chapter.name }}
              </p>
              <ul class="section-list">
                <li class="section-item" v-for="section in chapter.coursesections" :key="section.name">
                  <p class="name"><span class="index">{{ chapter.chapter }}-{{ section.orders }}</span>
                    {{ section.name }}<span class="free" v-if="section.free_trail">免费</span></p>
                  <p class="time">{{ section.duration }} <img src="@/assets/img/chapter-player.svg"></p>
                  <button class="try" v-if="section.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_info.teacher.image">
                <div class="name">
                  <p class="teacher-name">{{ course_info.teacher.name }}
                    {{ course_info.teacher.title }}</p>
                  <p class="teacher-title">{{ course_info.teacher.signature }}</p>
                </div>
              </div>
              <p class="narrative">{{ course_info.teacher.brief }}</p>
            </div>
          </div>
        </div>
      </div>
    </div>
    <Footer/>
  </div>
</template>

<script>
import Header from "@/components/Header"
import Footer from "@/components/Footer"


export default {
  name: "Detail",
  data() {
    return {
      tabIndex: 2,   // 当前选项卡显示的下标
      course_id: 0, // 当前课程信息的ID
      course_info: {
        teacher: {},
      }, // 课程信息
      course_chapters: [], // 课程的章节课时列表
      mp4_url: 'https://video.pearvideo.com/mp4/short/20230703/cont-1784316-71095491-hd.mp4',
    }
  },
  created() {
    this.get_course_id();
    this.get_course_data();
    this.get_chapter();
  },
  methods: {
    onLoaded() {
      console.log('视频播放第一帧')
    },
    onPlayerPlay() {
      // 当视频播放时，执行的方法
      console.log('视频开始播放')
    },
    onPlayerPause() {
      // 当视频暂停播放时，执行的方法
      console.log('视频暂停，可以打开广告了')
    },
    get_course_id() {
      // 获取地址栏上面的课程ID
      this.course_id = this.$route.params.id
      if (this.course_id < 1) {
        let _this = this;
        _this.$alert("对不起，当前视频不存在！", "警告", {
          callback() {
            _this.$router.go(-1);
          }
        });
      }
    },
    get_course_data() {
      // ajax请求课程信息
      this.$axios.get(`${this.$settings.BASE_URL}course/course/${this.course_id}/`).then(response => {
        this.course_info = response.data.data;
        console.log(this.course_info)
      }).catch(() => {
        this.$message({
          message: "对不起，访问页面出错！请联系客服工作人员！"
        });
      })
    },

    get_chapter() {
      // 获取当前课程对应的章节课时信息
      this.$axios.get(`${this.$settings.BASE_URL}course/course_chapter/`, {
        params: {
          "course": this.course_id,
        }
      }).then(response => {
        this.course_chapters = response.data.data;
      }).catch(error => {
        window.console.log(error.response);
      })
    },
  },
  components: {
    Header,
    Footer,
  }
}
</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;
}

.section-list {
  padding: 0 20px;
}

.section-list .section-item {
  padding: 15px 20px 15px 36px;
  cursor: pointer;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.section-item .name {
  font-size: 14px;
  color: #666;
  float: left;
}

.section-item .index {
  margin-right: 5px;
}

.section-item .free {
  font-size: 12px;
  color: #fff;
  letter-spacing: .19px;
  background: #ffc210;
  border-radius: 100px;
  padding: 1px 9px;
  margin-left: 10px;
}

.section-item .time {
  font-size: 14px;
  color: #666;
  letter-spacing: .23px;
  opacity: 1;
  transition: all .15s ease-in-out;
  float: right;
}

.section-item .time img {
  width: 18px;
  height: 18px;
  margin-left: 15px;
  vertical-align: text-bottom;
}

.section-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;
}

.section-item:hover {
  background: #fcf7ef;
  box-shadow: 0 0 0 0 #f3f3f3;
}

.section-item:hover .name {
  color: #333;
}

.section-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>

5 视频托管

# 以后 静态文件(视频，图片，zip。。。)，因为会越来越多，不会放在项目的media中---》使用第三方的托管平台---》第三方文件存储

# 存储视频，图片，文件
	-1 meida
    -2 第三方存储（花钱）
    	-七牛云
        -阿里 oss存储
        -其他。。。
    -3 自己公司内部搭建文件存储
    	-Ceph（重）、Minio（用的多一些）、FastDFS（老牌）
        -知乎：
        	-FastDFS：https://zhuanlan.zhihu.com/p/372286804
     	-Minio：之前学长写的博客
        	-参照一下：下午我搭建一下
            
        
# 使用七牛云托管
	-空间：存储文件的地方，不同空间相互隔离
    -注册七牛云账号
    -选择文件存储kodo
    -创建空间，手动上传视频
    
    
# 正常项目上传流程
	-后端：需要配合文件上传接口
    	-前端选择视频----》传到咱们后端----》后端把视频传到七牛云上----》返回地址--》存到咱们数据库
        -前端直接使用js---》传到七牛云---》七牛云返回地址---》向咱们后端发送ajax请求---》我们直接把地址存到库中即可
        
# 如何使用python把文件传到七牛云
	
from qiniu import Auth, put_file

q = Auth('', '')
#要上传的空间
bucket_name = 'lqz-luffy'
#上传后保存的文件名
key = '致命诱惑.mp4'
#生成上传 Token，可以指定过期时间等
token = q.upload_token(bucket_name, key, 3600)
#要上传文件的本地路径
localfile = './1.mp4'
ret, info = put_file(token, key, localfile, version='v2')
print(info)
print(ret)
print('http://rx7c1tgq2.hd-bkt.clouddn.com/'+key)
        
        
        
        
 # 域名备案相关
	1 以后写了项目，放到互联网上给别人用
    2 购买域名---》www.lqz.com
    3 备案---》工信部---》流程比较繁琐
    4 项目在  189.28.11.11  
    5 域名解析：只要www.lqz.com  ---》189.28.11.11  
        

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