课程模块
06-01 课程主页面之前台
FreeCourse.vue
<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 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="'/free/detail/'+course.id">{{course.name}}</router-link>
<span><img src="src/assets/img/avtar.png" 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>
<!-- 分页器 -->
<div class="course_pagination block">
<el-pagination
@size-change="handleSizeChange"
@current-change="handleCurrentChange"
:current-page.sync="filter.page"
:page-sizes="[2, 3, 5, 10]"
: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: 2, // 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.$settings.base_url}/course/categories/`).then(response => {
this.category_list = response.data;
}).catch(() => {
this.$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.$settings.base_url}/course/free/`, {
params: filters
}).then(response => {
// console.log(response.data);
this.course_list = response.data.results;
this.course_total = response.data.count;
// console.log(this.course_list);
}).catch(() => {
this.$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/avatar1.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/avatar1.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>
06-02 课程主页之课程表分析
class Course(models.Model): name = models.CharField(max_length=64) title = models.CharField(max_length=64) detail = models.TextField() # 可以关联详情表 type = models.IntegerField(choices=((0, 'Python'), (1, 'Linux')), default=0) is_show = models.BooleanField(default=False) # 1. 重点: choices字段后期优化方法: 将choices字段制作成一对多外键关联表, 为了之后的可扩展性埋下伏笔 # level = models.IntegerField(choices=((0, '入门'), (1, '进阶')), default=0) level = models.ForeignKey(to='LevelChoices', on_delete=models.DO_NOTHING, db_constraint=False) # 2. 重点: 针对后期需要获取学生学习人数, 课程总时长, 这些需要通过跨表查询才可以实现这总统计, 那么我们使用数据库设计优化普通字段. (注意: 默认值都是0) students = models.IntegerField(default=0, verbose_name='总学生') time = models.IntegerField(default=0, verbose_name='总学时') class Meta: abstract = True class LevelChoices(models.Model): """choices字段后期优化方法""" introduction = models.CharField(verbose_name='入门') advance = models.CharField(verbose_name='进阶') # 免费课 class FreeCourse(Course): image = models.ImageField(upload_to='course/free') attachment = models.FileField(upload_to='attachment') # 实战课 class ActualCourse(Course): image = models.ImageField(upload_to='course/actual') price = models.DecimalField(max_digits=7, decimal_places=2) cost = models.DecimalField(max_digits=7, decimal_places=2) # 轻课 class LightCourse(Course): image = models.ImageField(upload_to='course/light') price = models.DecimalField(max_digits=7, decimal_places=2) cost = models.DecimalField(max_digits=7, decimal_places=2) period = models.IntegerField(verbose_name='学习建议周期(month)', default=0) # 评论表：分三个表、(id，ctx，date，user_id，free_course_id, comment_id) # 老师表：在课程表建立多对一外键 # 章节表：在章节表建立多对一外键关联课程
二. 免费课案例
1.基表utils/models.py
from django.db import models # Create your models here. class BaseModel(models.Model): created_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间') updated_time = models.DateTimeField(auto_now=True, verbose_name='最后更新时间') is_delete = models.BooleanField(default=False, verbose_name='是否删除') is_show = models.BooleanField(default=True, verbose_name='是否展示') orders = models.IntegerField(verbose_name='优先级') class Meta: # 不实际建表 abstract = True
from luffyapi.utils.models import BaseModel # 实际路飞课程相关表，以免费课为例 class CourseCategory(BaseModel): """分类""" # python,go,linux,网络安全，跟课程一对多的关系 name = models.CharField(max_length=64, unique=True, verbose_name="分类名称") class Meta: db_table = "luffy_course_category" verbose_name = "分类" verbose_name_plural = verbose_name def __str__(self): return "%s" % self.name class Course(BaseModel): """课程""" course_type = ( (0, '付费'), (1, 'VIP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'), ) name = models.CharField(max_length=128, verbose_name="课程名称") course_img = models.ImageField(upload_to="course", 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") # 使用这个字段的原因 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") price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价", default=0) # !!!重点!!!: 数据库设计优化普通字段. (注意: 默认值都是0) ''' 虽然下述的三个字段可以从其他表里面跨表查询计算得出，但是频繁跨表效率, 因此我们建立普通字段, ''' students = models.IntegerField(verbose_name="学习人数", default=0) 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) # !!!重点!!!: 一个分类可以有多门课程. 一门课程不可以属于多门分类. 关系: 课程和分类, 课程是多的一方 -> 一对多 course_category = models.ForeignKey("CourseCategory", on_delete=models.SET_NULL, db_constraint=False, null=True, blank=True, verbose_name="课程分类") # !!!重点!!!: 一个老师教多门课程. 一个课程不可以被多个老师教. 关系: 课程和老师, 课程是多的一方. -> 一对多 teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, db_constraint=False, verbose_name="授课老师") class Meta: db_table = "luffy_course" verbose_name = "课程" verbose_name_plural = "课程" def __str__(self): return "%s" % self.name @property def course_type_name(self): return self.get_course_type_display() @property def level_name(self): return self.get_level_display() @property def status_name(self): return self.get_status_display() @property def section_list(self): ll = [] # 根据课程取出所有章节（反向查询，表名小写_set.all(),有relates_name,就是coursechapters.all() course_chapter_lsit = self.coursechapters.all() for course_chapter in course_chapter_lsit: # 通过章节对象，取到章节下所有的课时（反向查询） # course_chapter,表名小写_set.all(),因Forinkey字段加了related_name,现在变成了coursesections.all() course_section_list = course_chapter.coursesections.all() for course_section in course_section_list: ll.append({ 'name': course_section.name, 'free_trail': course_section.free_trail, 'section_link': course_section.section_link, 'duration': course_section.duration, }) if len(ll) >= 4: return ll else: return ll class Teacher(BaseModel): """导师""" # 跟课程一对多关系，关联字段写在课程表中 role_choices = ( (0, '讲师'), (1, '导师'), (2, '班主任'), ) name = models.CharField(max_length=32, verbose_name="导师名") role = models.SmallIntegerField(choices=role_choices, default=0, verbose_name="导师身份") title = models.CharField(max_length=64, verbose_name="职位、职称") signature = models.CharField(max_length=255, verbose_name="导师签名", help_text="导师签名", blank=True, null=True) image = models.ImageField(upload_to="teacher", null=True, verbose_name="导师封面") brief = models.TextField(max_length=1024, verbose_name="导师描述") class Meta: db_table = "luffy_teacher" verbose_name = "导师" verbose_name_plural = verbose_name def __str__(self): return "%s" % self.name def role_name(self): # 返回角色的中文 return self.get_role_display() class CourseChapter(BaseModel): """章节""" # 一个课程多个章节，跟课程的关系是一对多关系 chapter = models.SmallIntegerField(verbose_name="第几章", default=1) name = models.CharField(max_length=128, verbose_name="章节标题") summary = models.TextField(verbose_name="章节介绍", blank=True, null=True) pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True) # !!!重点!!!: related_name的指定争对子查询的反向查询. 当结果有多个的时候就不需要_set. 如: ''' course = Course.objects.filter(pk=1).first() res = course.coursechapters.all() # 如果没有指定related_name那么就会是如下. res = course.coursechapter_set.all() Foreignkey字段： -related_name 反向操作是，使用的字段名，用于替代原反向查询时的'表名_set' -related_query_name 反向查询操作时，使用的连接前缀，用于替换表名 ''' # !!!重点!!!: 一个课程可以有多个章节. 一个章节不能在多个课程中. 关系: 课程和课程章节, 章节是多的一方. -> 一对多 course = models.ForeignKey("Course", related_name='coursechapters', on_delete=models.CASCADE, db_constraint=False, verbose_name="课程名称") class Meta: db_table = "luffy_course_chapter" verbose_name = "章节" verbose_name_plural = verbose_name def __str__(self): return "%s:(第%s章)%s" % (self.course, self.chapter, self.name) class CourseSection(BaseModel): """课时""" # 章节和课时是一对多的关系，关联字段写在多的方（课时） section_type_choices = ( (0, '文档'), (1, '练习'), (2, '视频') ) name = models.CharField(max_length=128, verbose_name="课时标题") orders = models.PositiveSmallIntegerField(verbose_name="课时排序") section_type = models.SmallIntegerField(default=2, choices=section_type_choices, verbose_name="课时种类") section_link = models.CharField(max_length=255, blank=True, null=True, verbose_name="课时链接", help_text="若是video，填vid,若是文档，填link") duration = models.CharField(verbose_name="视频时长", blank=True, null=True, max_length=32) # 仅在前端展示使用 pub_date = models.DateTimeField(verbose_name="发布时间", auto_now_add=True) free_trail = models.BooleanField(verbose_name="是否可试看", default=False) # !!!重点!!!: 一个章节可以有多个课时. 一个课时不包含多个章节. 关系: 课程和章节, 课时是多的一方 -> 一对多 chapter = models.ForeignKey("CourseChapter", related_name='coursesections', on_delete=models.CASCADE, db_constraint=False, verbose_name="课程章节") class Meta: db_table = "luffy_course_Section" verbose_name = "课时" verbose_name_plural = verbose_name def __str__(self): return "%s-%s" % (self.chapter, self.name) @property def section_type_name(self): return self.get_section_type_display()
import xadmin from . import models xadmin.site.register(models.CourseCategory) xadmin.site.register(models.Course) xadmin.site.register(models.Teacher) xadmin.site.register(models.CourseChapter) xadmin.site.register(models.CourseSection)
python manage.py makemigrations
python manage.py migrate
1. 创建课程应用, 注册应用 2. 分析课程表, 构建课程表, 迁移课程表, 插入数据 3. 修改之前的BaseModel表中的update_time变成updated_time, create_time变成created_time, display_order变成orders 4. 课程引用下admin.py变成adminx.py, 并注册 5. 修改轮播图的试图接口, 将使用display_order排序的字段变成orders, 还有修改轮播图的定时任务
06-03 课程主页之课程表数据
# 头像图片放在 media/teacher 文件夹下 # 课程图片放在 media/course 文件夹下
INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (1, 1, 1, 0, '2019-07-14 13:44:19.661327', '2019-07-14 13:46:54.246271', 'Alex', 1, '老男孩Python教学总监', '金角大王', 'teacher/alex_icon.png', '老男孩教育CTO & CO-FOUNDER 国内知名PYTHON语言推广者 51CTO学院2016\2017年度最受学员喜爱10大讲师之一 多款开源软件作者 曾任职公安部、飞信、中金公司、NOKIA中国研究院、华尔街英语、ADVENT、汽车之家等公司'); INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (2, 2, 1, 0, '2019-07-14 13:45:25.092902', '2019-07-14 13:45:25.092936', 'Mjj', 0, '前美团前端项目组架构师', NULL, 'teacher/mjj_icon.png', '是马JJ老师, 一个集美貌与才华于一身的男人，搞过几年IOS，又转了前端开发几年，曾就职于美团网任高级前端开发，后来因为不同意王兴(美团老板)的战略布局而出家做老师去了，有丰富的教学经验，开起车来也毫不含糊。一直专注在前端的前沿技术领域。同时，爱好抽烟、喝酒、烫头(锡纸烫)。 我的最爱是前端，因为前端妹子多。'); INSERT INTO luffy_teacher(id, orders, is_show, is_delete, created_time, updated_time, name, role, title, signature, image, brief) VALUES (3, 3, 1, 0, '2019-07-14 13:46:21.997846', '2019-07-14 13:46:21.997880', 'Lyy', 0, '老男孩Linux学科带头人', NULL, 'teacher/lyy_icon.png', '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');
INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (1, 1, 1, 0, '2019-07-14 13:40:58.690413', '2019-07-14 13:40:58.690477', 'Python'); INSERT INTO luffy_course_category(id, orders, is_show, is_delete, created_time, updated_time, name) VALUES (2, 2, 1, 0, '2019-07-14 13:41:08.249735', '2019-07-14 13:41:08.249817', 'Linux');
INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (1, 1, 1, 0, '2019-07-14 13:54:33.095201', '2019-07-14 13:54:33.095238', 'Python开发21天入门', 'courses/alex_python.png', 0, 'Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土&&&Python从入门到入土', 0, '2019-07-14', 21, '', 0, 231, 120, 120, 0.00, 1, 1); INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (2, 2, 1, 0, '2019-07-14 13:56:05.051103', '2019-07-14 13:56:05.051142', 'Python项目实战', 'courses/mjj_python.png', 0, '', 1, '2019-07-14', 30, '', 0, 340, 120, 120, 99.00, 1, 2); INSERT INTO luffy_course(id, orders, is_show, is_delete, created_time, updated_time, name, course_img, course_type, brief, level, pub_date, period, attachment_path, status, students, sections, pub_sections, price, course_category_id, teacher_id) VALUES (3, 3, 1, 0, '2019-07-14 13:57:21.190053', '2019-07-14 13:57:21.190095', 'Linux系统基础5周入门精讲', 'courses/lyy_linux.png', 0, '', 0, '2019-07-14', 25, '', 0, 219, 100, 100, 39.00, 2, 3);
INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (1, 1, 1, 0, '2019-07-14 13:58:34.867005', '2019-07-14 14:00:58.276541', 1, '计算机原理', '', '2019-07-14', 1); INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (2, 2, 1, 0, '2019-07-14 13:58:48.051543', '2019-07-14 14:01:22.024206', 2, '环境搭建', '', '2019-07-14', 1); INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (3, 3, 1, 0, '2019-07-14 13:59:09.878183', '2019-07-14 14:01:40.048608', 1, '项目创建', '', '2019-07-14', 2); INSERT INTO luffy_course_chapter(id, orders, is_show, is_delete, created_time, updated_time, chapter, name, summary, pub_date, course_id) VALUES (4, 4, 1, 0, '2019-07-14 13:59:37.448626', '2019-07-14 14:01:58.709652', 1, 'Linux环境创建', '', '2019-07-14', 3);
INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (1, 1, 0, '2019-07-14 14:02:33.779098', '2019-07-14 14:02:33.779135', '计算机原理上', 1, 2, NULL, NULL, '2019-07-14 14:02:33.779193', 1, 1); INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (2, 1, 0, '2019-07-14 14:02:56.657134', '2019-07-14 14:02:56.657173', '计算机原理下', 2, 2, NULL, NULL, '2019-07-14 14:02:56.657227', 1, 1); INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (3, 1, 0, '2019-07-14 14:03:20.493324', '2019-07-14 14:03:52.329394', '环境搭建上', 1, 2, NULL, NULL, '2019-07-14 14:03:20.493420', 0, 2); INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (4, 1, 0, '2019-07-14 14:03:36.472742', '2019-07-14 14:03:36.472779', '环境搭建下', 2, 2, NULL, NULL, '2019-07-14 14:03:36.472831', 0, 2); INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (5, 1, 0, '2019-07-14 14:04:19.338153', '2019-07-14 14:04:19.338192', 'web项目的创建', 1, 2, NULL, NULL, '2019-07-14 14:04:19.338252', 1, 3); INSERT INTO luffy_course_Section(id, is_show, is_delete, created_time, updated_time, name, orders, section_type, section_link, duration, pub_date, free_trail, chapter_id) VALUES (6, 1, 0, '2019-07-14 14:04:52.895855', '2019-07-14 14:04:52.895890', 'Linux的环境搭建', 1, 2, NULL, NULL, '2019-07-14 14:04:52.895942', 1, 4);
06-04 课程主页之课程接口
1. course/views.py
from rest_framework.viewsets import GenericViewSet from rest_framework.mixins import ListModelMixin from .models import CourseCategory from .serializer import CourseModelSerializer class CourseCategoryView(ListModelMixin, GenericViewSet): queryset = CourseCategory.objects.filter(is_delete=False, is_show=True).order_by('orders') serializer_class = CourseModelSerializer
from rest_framework import serializers from .models import CourseCategory class CourseModelSerializer(serializers.ModelSerializer): class Meta: model = CourseCategory fields = ('id', 'name')
router.register('categories', views.CourseCategoryView, 'categories')
path('course/', include('course.urls')),
1. 视图定义课程分类视图, 继承GenericViewSet, ListModelMixin 2. 对课程分类接口进行is_delete, is_show过滤, 再使用orders进行排序 3. 序列化定义课程分类序列化类. 不过需要给课程分类的id, 在分类的时候, 需要前端传递过来实现分类. 然后只需要给课程分类名即可. 4. 配置course中的路由, 配置总路由
二. 课程接口
1. views.py
from .pagination import PageNumberPagination from rest_framework.filters import OrderingFilter, SearchFilter from django_filters.rest_framework import DjangoFilterBackend class CourseView(ListModelMixin, GenericViewSet): queryset = Course.objects.filter(is_delete=False, is_show=True).order_by('orders') serializer_class = CourseModelSerializer pagination_class = PageNumberPagination filter_backends = [] # 内置排序 filter_backends.append(OrderingFilter) ordering_param = 'ordering' ordering_fields = ('id', 'price', 'students') # 内置过滤(搜索组件) """ filter_backends.append(SearchFilter) search_param = 'search' search_fields = ['course_category'] # 外键字段的操作将会抛出异常 """ # django-filter过滤 filter_backends.append(DjangoFilterBackend) # 指定过滤字段方式一: filter_fields = ['course_category', 'students']
class TeacherModelSerializer(serializers.ModelSerializer): class Meta: model = Teacher fields = ('name', 'role_name', 'title', 'signature', 'image', 'brief') class CourseModelSerializer(serializers.ModelSerializer): # teacher子序列化 teacher = TeacherModelSerializer() class Meta: model = Course fields = ( 'id', 'name', 'course_img', 'brief', 'attachment_path', 'pub_sections', 'price', 'students', 'period', 'sections', 'course_type_name', 'level_name', 'status_name', 'teacher', 'section_list', )
class Course(BaseModel): ... @property def level_name(self): return self.get_level_display() @property def course_type_name(self): return self.get_course_type_display() @property def status_name(self): return self.get_status_display() @property def section_list(self): course_chapter_queryset = self.coursechapters.all() course_section_list = [] for course_chapter in course_chapter_queryset: course_section_queryset = course_chapter.coursesections.all() for course_section in course_section_queryset: course_section_list.append({ 'name': course_section.name, 'section_type': course_section.section_type, 'section_link': course_section.section_link, 'duration': course_section.duration, }) if len(course_section_list) == 4: return course_section_list return course_section_list class Teacher(BaseModel): ... @property def role_name(self): return self.get_role_display()
from rest_framework.pagination import PageNumberPagination as PNP class PageNumberPagination(PNP): page_size = 1 page_query_param = 'page' page_size_query_param = 'size' max_page_size = 5
from rest_framework.filters import BaseFilterBackend class CustomFilter(BaseFilterBackend): def filter_queryset(self, request, queryset, view): # 老师的模糊匹配 name = request.GET.get('teacher') if not name: return queryset teacher_queryset = queryset.filter(teacher__name__contains=name) return teacher_queryset
router.register('free', views.CourseView, 'free')
1. 视图中定义课程视图类继承GenericViewSet,ListModelMixin 2. 视图中queryset的查询过滤is_delete, is_show, 再使用orders字段进行排序 3. 序列化中定义课程序列化类, 控制序列化的字段, 在序列化类中针对teacher使用子序列化进行控制teacher包含字段对应数值的展示 4. 对应choices字段的展示, 有2种方式进行控制, 在序列化类中重写字段, 使用serializerMethod, 模型类中使用@property装饰返回对应get_字段_display()字段参数对应的值. 5. 配置路由 6. 配置分页器. 自定义分页器, 使用了as的特殊用法
三. 排序和过滤组件
1. 内置排序组件OrderingFilter
# 1）在视图文件views.py中导入drf的搜索组件 from rest_framework.filters import OrderingFilter # 2）将搜索组件配置给群查接口视图类的filter_backends filter_backends = [OrderingFilter] # 3）配置视图类关联的Model表允许排序的字段 ordering_fields = ['id', 'price'] # 4）前台访问该群查接口，采用拼接参数方式用search关键字将搜索目标提供给后台 http://127.0.0.1:8000/course/free/?ordering=price,-id # 按price升序，如果price相同，再按id降序
2. 过滤组件
1) 内置过滤组件SearchFilter
# 缺点: 外键字段的搜索操作将会抛出异常: Related Field got invalid lookup: icontains # 1）在视图文件views.py中导入drf的搜索组件 from rest_framework.filters import SearchFilter # 2）将搜索组件配置给群查接口视图类的filter_backends filter_backends = [SearchFilter] # 3）配置视图类关联的Model表参与搜索的字段 search_fields = ['name', 'id'] # 4）前台访问该群查接口，采用拼接参数方式用search关键字将搜索目标提供给后台 http://127.0.0.1:8000/course/free/?search=2 # id或name中包含2的所有结果
# 介绍: 争对django内置搜索组件的拓展, 在django内置的基础之上还拓展了外键字段的过滤功能. # 前提：安装django-filter插件 pip install django-filter (注意: 不要安装成了django-filters) """方式一""" # 1）在视图文件views.py中导入django-filter的功能组件 from django_filters.rest_framework import DjangoFilterBackend # 2）将搜索组件配置给群查接口视图类的filter_backends filter_backends = [DjangoFilterBackend] # 3）配置视图类关联的Model表可以分类的字段（通常是可以分组的字段） filter_fields = ['course_category'] # 4）前台访问该群查接口，采用拼接参数方式用分类course_category字段将分类条件提供给后台 http://127.0.0.1:8000/course/free/?course_category=1 # 拿课程分类1下的所有课程 '''方式二''' # 1）自定义过滤类继承django-filter插件的FilterSet类，绑定Model表，并设置分类字段 from django_filters.filterset import FilterSet from . import models class CourseFilterSet(FilterSet): class Meta: model = models.Course fields = ['course_category'] # 2）在视图文件views.py中导入django-filter的功能组件及自定义的过滤类 from django_filters.rest_framework import DjangoFilterBackend from .filters import CourseFilterSet # 3）将搜索组件配置给群查接口视图类的filter_backends filter_backends = [DjangoFilterBackend] # 4）配置视图类关联的自定义过滤类 filter_class = CourseFilterSet # 5）前台访问该群查接口，采用拼接参数方式用分类course_category字段将分类条件提供给后台 http://127.0.0.1:8000/course/free/?course_category=1 # 拿课程分类1下的所有课程
# 1）自定义过滤类继承django-filter插件的FilterSet类，绑定Model表，并设置自定义区间规则字段 from django_filters.filterset import FilterSet from . import models class CourseFilterSet(FilterSet): # 区间过滤: students学生中总人数要大于等于min_students, 要小于等于max_students. [min_students, max_students] max_students = filters.NumberFilter(field_name='students', lookup_expr='lte') min_students = filters.NumberFilter(field_name='students', lookup_expr='gte') class Meta: model = Course fields = ['course_category', 'students', 'min_students', 'max_students'] # 2）在视图文件views.py中导入django-filter的功能组件及自定义的过滤类 from django_filters.rest_framework import DjangoFilterBackend from .filters import CourseFilterSet # 3）将搜索组件配置给群查接口视图类的filter_backends filter_backends = [DjangoFilterBackend] # 4）配置视图类关联的自定义过滤类 filter_class = CourseFilterSet # 5）前台访问该群查接口，采用拼接参数方式用自定义区间规则字段将区间条件提供给后台 http://127.0.0.1:8000/course/free/?min_students=230&max_students=250 # 获取学生总人数230~250之间的数据
''' # django-filter区间过滤源码流程 关键: filter_queryset get_filterset_class: 反射filter_class MetaBase AutoFilterSet filterset就是我们自定义类实例化出来的对象 有值调用: filterset.is_valid() reutrn filterset.qs qs在BaseFilterSet中 return self.qs = qs queryset对象 反射filter_fields '''
# filters.py from rest_framework.filters import BaseFilterBackend class CustomFilter(BaseFilterBackend): def filter_queryset(self, request, queryset, view): # 老师的模糊匹配 name = request.GET.get('teacher') if not name: return queryset teacher_queryset = queryset.filter(teacher__name__contains=name) return teacher_queryset # views.py # 自定义过滤: 通过老师名进行模糊匹配 filter_backends = [CustomFilter]
# 过滤, 排序, 分页的使用范围 视图类继承关系中必须含有的视图类: ListModelMixin, GenericAPIView ListModelMixin中实现的是调用GenericAPIView中对应的过滤,排序(filter_queryset), 分页(paginate_queryset)方法 GenericAPIView中实现的是循环调用视图类中配置的类, 调用视图类中对应的方法 def filter_queryset(self, queryset): for backend in list(self.filter_backends): queryset = backend().filter_queryset(self.request, queryset, self) return queryset
06-05 课程详情页之前台
一. 流程
''' 1. 课程详情页面创建 FreeCourseDetail.vue 2. 配置课程详情页面路由 /free/detail/:id 3. 课程详情页面从路由中获取 this.$route.params.id 4. 直接拿课程详情页面 5. 下载视频组件 vue-video-player 6. main.js中配置刚刚下载好的视频组件vue-video-player '''
cnpm install vue-video-player@5.0.2
// vue-video播放器 require('video.js/dist/video-js.css'); require('vue-video-player/src/custom-theme.css'); import VideoPlayer from 'vue-video-player' Vue.use(VideoPlayer);
""" enum.svg chapter-player.svg cart-yellow.svg """
import FreeCourseDetail from './views/FreeCourseDetail.vue' export default new Router({ routes: [ // ... { path: '/free/detail/:pk', name: 'free-detail', component: FreeCourseDetail } ] }
<template>
<div class="detail">
<Header/>
<div class="main">
<div class="course-info">
<div class="wrap-left">
<videoPlayer class="video-player vjs-custom-skin"
ref="videoPlayer"
:playsinline="true"
:options="playerOptions"
@play="onPlayerPlay($event)"
@pause="onPlayerPause($event)">
</videoPlayer>
</div>
<div class="wrap-right">
<h3 class="course-name">{{course_info.name}}</h3>
<p class="data">{{course_info.students}}人在学 课程总时长：{{course_info.sections}}课时/{{course_info.pub_sections}}小时 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"
// 加载组件
import {videoPlayer} from 'vue-video-player';
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
playerOptions: {
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"或"4:3"）
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）
}],
}
}
},
created() {
this.get_course_id();
this.get_course_data();
this.get_chapter();
},
methods: {
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.pk || this.$route.query.pk;
if (this.course_id < 1) {
let _this = this;
_this.$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/free/${this.course_id}/`).then(response => {
// window.console.log(response.data);
this.course_info = response.data;
console.log(this.course_info)
}).catch(() => {
this.$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
// http://127.0.0.1:8000/course/chapters/?course=(pk)
this.$axios.get(`${this.$settings.base_url}/course/chapters/`, {
params: {
"course": this.course_id,
}
}).then(response => {
this.course_chapters = response.data;
}).catch(error => {
window.console.log(error.response);
})
},
},
components: {
Header,
// Footer,
videoPlayer, // 注册组件
}
}
</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>
七 . 视频托管
七牛云视频托管
# 1 注册七牛云，实名认证 https://www.qiniu.com/ # 2 登录--->管理控制台--->对象存储 # 3 新建空间--->上传视频--->拿到视频链接
06-06 课程详情页之后台
一. 流程
''' 1. 课程单查 CourseView配置RetrieveModelMixin 2. 课程章节 新建视图中 CourseChapterView, 继承G/L 新建序列化 CourseChapterModelSerializer 需要的字段. name, summary, chapter, 章节下的课时使用子序列化. 新建序列化 CourseSectionModelSerializer 需要的字段name, orders, duration, section_type_name, section_link, free_trail 配置路由 course_chapter 问题: 会把所有的章节查出来 解决: 按照课程过滤 问题: 前端的章节使用的路由与刚刚写的不匹配 解决: 修改后端路由为 chapters '''
router.register('free', views.CourseView, 'free') router.register('chapters', views.CourseChapterView, 'chapters')
from rest_framework.viewsets import GenericViewSet from rest_framework.mixins import ( ListModelMixin, RetrieveModelMixin ) from .models import ( CourseCategory, Course, CourseChapter ) from .serializer import ( CourseCategoryModelSerializer, CourseModelSerializer, CourseChapterModelSerializer ) # 课程群查 from .pagination import PageNumberPagination from rest_framework.filters import OrderingFilter, SearchFilter from django_filters.rest_framework import DjangoFilterBackend class CourseView(ListModelMixin, RetrieveModelMixin, GenericViewSet): queryset = Course.objects.filter(is_delete=False, is_show=True).order_by('orders') serializer_class = CourseModelSerializer pagination_class = PageNumberPagination filter_backends = [] # 内置排序 filter_backends.append(OrderingFilter) ordering_param = 'ordering' ordering_fields = ('id', 'price', 'students') # django-filter过滤 filter_backends.append(DjangoFilterBackend) # 指定过滤字段方式一: filter_fields = ['course_category', 'students'] # 一个课程的所有章节（群查） class CourseChapterView(ListModelMixin, GenericViewSet): queryset = CourseChapter.objects.filter(is_delete=False, is_show=True).order_by('orders') serializer_class = CourseChapterModelSerializer # 课程章节按照每个课程进行过滤 filter_backends = [DjangoFilterBackend] filter_fields = ['course']
class CourseSectionSerializer(serializers.ModelSerializer): class Meta: model = models.CourseSection fields = ('name', 'orders', 'section_link', 'duration', 'free_trail') class CourseChapterSerializer(serializers.ModelSerializer): coursesections = CourseSectionSerializer(many=True) class Meta: model = models.CourseChapter fields = ('name', 'chapter', 'summary', 'coursesections')
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