路飞学城06--集成redis缓存、轮播图定时任务、课程页面设计和API接口
1 Django使用Redis 作为缓存
pip install django-redis
# 在配置文件中: 配置缓存的位置 以后还是正常用Django的缓存方法，但会缓存到Redis中
CACHES = {
"default": {
"BACKEND": "django_redis.cache.RedisCache",
"LOCATION": "redis://127.0.0.1:6379/0", # /0 表示哪一个库
"OPTIONS": {
"CLIENT_CLASS": "django_redis.client.DefaultClient",
"CONNECTION_POOL_KWARGS": {"max_connections": 100}
# "PASSWORD": "123",
}
}
}
# 使用的位置
# 方式1：使用redis连接对象 来操作
from django_redis import get_redis_connection
def test(request):
conn = get_redis_connection() # 从连接池中拿一个连接
res=conn.get('name') # 正常使用
print(res)
return HttpResponse('ok')
# 方式2：使用django的缓存 会自动缓存到redis中
from django.core.cache import cache
cache.set('name','xxx')
cache.get('name')
# django的缓存很高级，可以缓存python中所有的数据类型，包括对象
# ---》把对象通过pickle序列化成二进制，存到redis的字符串中
2 Django集成celery实现定时任务--定时更新首页轮播图
# 首页轮播图，先加入缓存
原因：提升接口并发量，提高性能。因为如果不加缓存，每次用户访问首页，都去查一次数据库，对数据库压力大
逻辑：第一次访问查数据库，拿到数据，放到缓存（redis），以后再访问，直接从redis中能够获取
# 导致：双写一致性问题(redis缓存和mysql数据不同步)
# 解决方案：缓存更新策略
-先更新数据库，再更新缓存 # 浪费性能，一般缓存不更新 直接删除
-先更新数据库，再删缓存 # 可靠性高一些 推荐使用
-先删缓存，再更新数据库（缓存删了，数据库还没更新，来了一个请求，缓存了老数据）
-定时更新（对实时性要求不高）
-每隔12个小时，更新一下缓存
-使用缓存，有可能出现的问题：缓存穿透，缓存击穿，缓存雪崩问题（暂时不讲）
# 面试回答：
先解释下什么是双写一致性问题？就是redis缓存和mysql数据出现了不同步。
怎么解决？有很多缓存更新策越，一些实时性不重要的就弄一个定时更新缓存，
实时要求高的：一开始是第三种，后面绝对不是很可靠，又用的 先更新数据库，再删缓存就行了。
2.1 修改首页轮播图接口--添加缓存
class BannerView(ViewSetMixin, ListAPIView):
queryset = models.Banner.objects.all().filter(is_delete=False, is_show=True).order_by('orders')[
:settings.BANNER_COUNT]
serializer_class = serializer.BannerSerializer
def list(self, request, *args, **kwargs):
# 先去缓存中获取，如果缓存有，直接返回，如果没有，去数据库查询，放到缓存
# 先去缓存中获取
banner_list = cache.get('banner_list_cache')
if not banner_list: # 去数据库中获取
# 没有走缓存
print('查了数据库')
res = super().list(request, *args, **kwargs)
banner_list = res.data # res是Response对象
# 放入到缓存中
cache.set('banner_list_cache', banner_list)
return Response(data=banner_list)
2.2 celery实现定时任务
# 目录结构
celery_task # 包名
__init__.py
celery.py # app所在py文件 (名字必须叫celery，不然 命令启动worker时，找不到)
home_task.py # 任务
提交任务.py # 提交任务
查看结果.py # 查看结果
# 步骤，
1 构建目录包 (任意取名，一般带有celery)
2 依次写 celery.py 、任务.py
3 把包直接复制到项目根路径
4 启动 beat 和 worker
2.2.1 home_task.py
# 更新轮播图缓存的任务
from celery_task.celery import app
from home import models
from django.conf import settings
from home import serializer
from django.core.cache import cache
@app.task()
def update_banner():
# 1 从mysql中取出轮播图数据
queryset = models.Banner.objects.all().filter(is_delete=False, is_show=True).order_by('orders')[
:settings.BANNER_COUNT]
# 2 序列化
ser = serializer.BannerSerializer(instance=queryset, many=True)
# 3 获取到字典,手动拼上前面的地址
banner_list = ser.data
for banner in banner_list:
banner['image'] = settings.BACKEND_URL % str(banner['image'])
# 4 放到缓存中
cache.set('banner_list_cache', banner_list)
return True
2.2.2 celery.py
from celery import Celery
# 由于celery和django 是独立的两个服务，要想在celery服务中使用django，必须加这两句 (跟之前 单独测试orm代码是一样的，使用Django的部分功能)
import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "luffy_api.settings.dev")
# import django
# django.setup() # 启动Django的意思
broker = 'redis://127.0.0.1:6379/1'
backend = 'redis://127.0.0.1:6379/2'
# include 是一个列表，放被管理的task 的py文件
app = Celery(__name__, backend=backend, broker=broker, include=[
'celery_task.course_task',
'celery_task.order_task',
'celery_task.user_task',
'celery_task.home_task', # 新写的task，一定要注册
])
# 修改celery的配置信息 app.conf整个celery的配置信息
# 时区
app.conf.timezone = 'Asia/Shanghai'
# 是否使用UTC
app.conf.enable_utc = False
# 配置定时任务
from datetime import timedelta
app.conf.beat_schedule = {
'update_banner_every_3_seconds': {
'task': 'celery_task.home_task.update_banner', # 指定执行的是哪个任务
'schedule': timedelta(seconds=3),
},
}
2.2.2 启动djagno，启动beat，启动worker
python manage.py runserver
celery -A celery_task beat -l info
celery -A celery_task worker -l info -P eventlet
3 课程页面（前端纯静态）
3.1 ActualCourse.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="this">全部</li>
<li>Python</li>
<li>Linux运维</li>
<li>Python进阶</li>
<li>开发工具</li>
<li>Go语言</li>
</ul>
<div class="ordering">
<ul>
<li class="title">筛 选:</li>
<li class="default this">默认</li>
<li class="hot">人气</li>
<li class="price">价格</li>
</ul>
<p class="condition-result">共21个课程</p>
</div>
</div>
<!-- 课程列表 -->
<div class="course-list">
<div class="course-item">
<div class="course-image">
<img src="@/assets/img/course-cover.jpeg" alt="">
</div>
<div class="course-info">
<h3>Python开发21天入门 <span><img src="@/assets/img/avatar1.svg" alt="">100人已加入学习</span></h3>
<p class="teather-info">Alex 金角大王 老男孩Python教学总监 <span>共154课时/更新完成</span></p>
<ul class="lesson-list">
<li><span class="lesson-title">01 | 第1节：初识编码</span> <span class="free">免费</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span> <span class="free">免费</span>
</li>
<li><span class="lesson-title">01 | 第1节：初识编码</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span></li>
</ul>
<div class="pay-box">
<span class="discount-type">限时免费</span>
<span class="discount-price">￥0.00元</span>
<span class="original-price">原价：9.00元</span>
<span class="buy-now">立即购买</span>
</div>
</div>
</div>
<div class="course-item">
<div class="course-image">
<img src="@/assets/img/course-cover.jpeg" alt="">
</div>
<div class="course-info">
<h3>Python开发21天入门 <span><img src="@/assets/img/avatar1.svg" alt="">100人已加入学习</span></h3>
<p class="teather-info">Alex 金角大王 老男孩Python教学总监 <span>共154课时/更新完成</span></p>
<ul class="lesson-list">
<li><span class="lesson-title">01 | 第1节：初识编码</span> <span class="free">免费</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span> <span class="free">免费</span>
</li>
<li><span class="lesson-title">01 | 第1节：初识编码</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span></li>
</ul>
<div class="pay-box">
<span class="discount-type">限时免费</span>
<span class="discount-price">￥0.00元</span>
<span class="original-price">原价：9.00元</span>
<span class="buy-now">立即购买</span>
</div>
</div>
</div>
<div class="course-item">
<div class="course-image">
<img src="@/assets/img/course-cover.jpeg" alt="">
</div>
<div class="course-info">
<h3>Python开发21天入门 <span><img src="@/assets/img/avatar1.svg" alt="">100人已加入学习</span></h3>
<p class="teather-info">Alex 金角大王 老男孩Python教学总监 <span>共154课时/更新完成</span></p>
<ul class="lesson-list">
<li><span class="lesson-title">01 | 第1节：初识编码</span> <span class="free">免费</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span> <span class="free">免费</span>
</li>
<li><span class="lesson-title">01 | 第1节：初识编码</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span></li>
</ul>
<div class="pay-box">
<span class="discount-type">限时免费</span>
<span class="discount-price">￥0.00元</span>
<span class="original-price">原价：9.00元</span>
<span class="buy-now">立即购买</span>
</div>
</div>
</div>
<div class="course-item">
<div class="course-image">
<img src="@/assets/img/course-cover.jpeg" alt="">
</div>
<div class="course-info">
<h3>Python开发21天入门 <span><img src="@/assets/img/avatar1.svg" alt="">100人已加入学习</span></h3>
<p class="teather-info">Alex 金角大王 老男孩Python教学总监 <span>共154课时/更新完成</span></p>
<ul class="lesson-list">
<li><span class="lesson-title">01 | 第1节：初识编码</span> <span class="free">免费</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span> <span class="free">免费</span>
</li>
<li><span class="lesson-title">01 | 第1节：初识编码</span></li>
<li><span class="lesson-title">01 | 第1节：初识编码初识编码</span></li>
</ul>
<div class="pay-box">
<span class="discount-type">限时免费</span>
<span class="discount-price">￥0.00元</span>
<span class="original-price">原价：9.00元</span>
<span class="buy-now">立即购买</span>
</div>
</div>
</div>
</div>
</div>
<Footer></Footer>
</div>
</template>
<script>
import Header from "../components/Header";
import Footer from "../components/Footer";
export default {
name: "ActualCourse",
components: {Header, Footer}
}
</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 .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 {
width: 100%;
}
.course .course-item .course-info {
float: left;
width: 596px;
}
.course-item .course-info h3 {
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 .lesson-list::after {
content: "";
display: block;
clear: both;
}
.course-item .lesson-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 .lesson-list li .lesson-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 .lesson-list li:hover {
background-image: url("/src/assets/img/play-icon-yellow.svg");
color: #ffc210;
}
.course-item .lesson-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 .lesson-list li:hover .free {
color: #ffc210;
border-color: #ffc210;
}
.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;
}
.course-item .pay-box .buy-now:hover {
color: #fff;
background: #ffc210;
border: 1px solid #ffc210;
}
</style>
4 课程表分析（创建课程相关表）
# 免费课 实战课 轻课 。。。
-如果建成一张表，使用课程类型区分不同课程
-存在问题：免费课没有价格，学习资料，作业，实战课有价格，
-不同课程字段不一样导致一张表的话，字段太多，而且有的用了有的没用
-我们的设计，一类课程，一张表
-免费课一张表
-实战课一张表
-轻课一张表
# 只以实战课为例
-实战课表：
-课程分类表（跟课程一对多，一个分类对应多门课程）
-老师表（跟课程是一对多，一个老师对应多门课程）
-章节表 （跟课程一对多，一个课程对应多个章节）
-课时表（跟章节是一对多，一个章节，多个课时）
from django.db import models
from utils.model import BaseModel
# 课程分类表
class CourseCategory(BaseModel):
"""分类"""
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 self.name
# 实战课表
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="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")
# 课程详情描述，存html内容
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)
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
# 老师表
class Teacher(BaseModel):
"""导师"""
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
# 章节表
class CourseChapter(BaseModel):
"""章节"""
course = models.ForeignKey("Course", related_name='coursechapters', on_delete=models.CASCADE, verbose_name="课程名称")
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)
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)
# 课时表
class CourseSection(BaseModel):
"""课时"""
section_type_choices = (
(0, '文档'),
(1, '练习'),
(2, '视频')
)
chapter = models.ForeignKey("CourseChapter", related_name='coursesections', on_delete=models.CASCADE,
verbose_name="课程章节")
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)
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)
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)
5 课程测试数据录入
# 表迁移--》admin中注册---》录入数据
-- 老师表
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');
-- 分类表
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');
-- 课程表
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', 'course/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', 'course/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', 'course/lyy_linux.png', 0, '', 0, '2019-07-14', 25, '', 0, 219, 100, 100, 39.00, 2, 3);
-- 章节表
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);
-- 课时表
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);
6 课程页面前端（前端带js）
<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="@/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="[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/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>
7 课程主页之课程列表接口
1 获取课程所有分类接口
2 查询所有课程接口
-通过课程分类过滤
-排序功能:学生人数，价格，id
-带分页
4 课程详情接口
7.1 获取所有课程分类
视图类
class CourseCategoryViewSet(GenericViewSet, ListModelMixin):
queryset = CourseCategory.objects.all().filter(is_delete=False, is_show=True).order_by('orders')
serializer_class = CourseCategorySerializer
序列化类
class CourseCategorySerializer(serializers.ModelSerializer):
class Meta:
model = CourseCategory
fields = ['id', 'name']
路由
router = SimpleRouter()
# api/v1/course/category/---->get请求就能获取所有分类
router.register('category',views.CourseCategoryViewSet,'category')
urlpatterns = [
]
urlpatterns += router.urls
7.2 查询所有课程接口
视图类
class CourseViewSet(GenericViewSet, ListModelMixin):
queryset = Course.objects.all().filter(is_delete=False, is_show=True).order_by('orders')
serializer_class = CourseSerializer
# 带分页
pagination_class = CommonPageNumberPagination
# 排序功能:学生人数，价格，id
filter_backends = [OrderingFilter,DjangoFilterBackend ]
ordering_fields = ['id','students','price']
# 支持过滤，按课程分类过滤：需要借助于django-filter
# http://127.0.0.1:8080/api/v1/course/actual/?course_category=2
filter_fields=['course_category']
序列化类
class TeacherSerializer(serializers.ModelSerializer):
class Meta:
model = Teacher
fields = ['id', 'name', 'title', 'signature', 'image', 'brief', 'role_name']
class CourseSerializer(serializers.ModelSerializer):
# 方法一：SerializerMethodField
# teacher = serializers.SerializerMethodField()
# def get_teacher(self, obj):
# return {'name': obj.teacher.name}
# 方法二：在models中重写一个方法
# 方式三：子序列化-->老师的序列化类即可
teacher = TeacherSerializer()
class Meta:
model = Course
# 返回课时，最多返回4条，超过4条，也是4条，不足4条，有多少返回多少
fields = ['id', 'name', 'students', 'teacher','sections','pub_sections','price','course_section_list','course_img']
路由
from rest_framework.routers import SimpleRouter
from . import views
router = SimpleRouter()
# api/v1/course/category/---->get请求就能获取所有分类
router.register('category',views.CourseCategoryViewSet,'category')
# api/v1/course/actual/---->get请求就能获取所有课程
router.register('actual',views.CourseViewSet,'actual')
urlpatterns = [
]
urlpatterns += router.urls
表模型
...
@property
def course_section_list(self):
# 根据课程拿到所有章节，从章节中一个个拿出课时，放到一个列表中，在循环的过程中判断列表长度是不是大于4，如果大于4，直接返回
course_se_list = []
# 根据课程拿到所有章节
course_chapter_list = self.coursechapters.all()
for course_chapter in course_chapter_list:
# 通过这个章节，获取所有课时
section_list = course_chapter.coursesections.all()
for section in section_list:
course_se_list.append({'id': section.id, 'name': section.name, 'free_trail': section.free_trail,
'section_link': section.section_link})
if len(course_se_list) >=4:
return course_se_list
return course_se_list
8 所有课程前端
# 分页老师测试出有bug
bug的原因：前端单页数据量:page_size 而后端配置: size
<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="@/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.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="[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.$http.get(`${this.$settings.base_url}course/category/`).then(response => {
this.category_list = response.data;
}).catch(() => {
this.$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 (bug的原因：前端单页数据量:page_size 而后端配置: size)
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;
}
// alert('----'+this.filter.page)
// alert(filters.page)
// 获取课程列表信息
this.$http.get(`${this.$settings.base_url}course/actual/`, {
params: filters
}).then(response => {
// console.log(response.data);
this.course_list = response.data.results;
this.course_total = response.data.count;
// console.log(this.course_list);
}).catch(() => {
this.$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/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>
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