课程前端页面
<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="'/actual/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(); // 加载课程分类
this.get_course(); // 加载科创城
},
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.$settings.base_url}course/category/`).then(response => {
this.category_list = response.data;
}).catch(() => {
this.$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.$settings.base_url}course/actual/`, {
params: filters
}).then(response => {
// console.log(response.data);
this.course_list = response.data.results;
this.course_total = response.data.count;
// console.log(this.course_list);
}).catch(() => {
this.$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>
课程主页表分析
# 三类课程---》表用同一个还是分开
-由于三种课程字段不一样，我们把每个课程简历一个表
# 以实战课为例来写
-课程分类表
-实战课表 ---》跟课程分类是一对多
---》Python7天入门---》第一章：环境搭建 5个视频 第二章：面向对象 15个视频
-课程章节---》跟实战课表是一对多的关系
-课时表---》跟章节表一对多
-老师表--》一对多---》一个老师讲多门课程
-评论表(没写)
# 建立5张表
# ForeignKey 属性on_delete可以选择如下：
-CASCADE 级联删除，比如删除老师，老师关联的所有课程都删除---》危险系数太高
作者和作者详情，就可以使用级联删除
-DO_NOTHING 什么都不做
-SET_DEFAULT 删了老师，课程这个字段设置成默认，配合default
-SET_NULL 删了老师，课程中老师这个字段设置为空 null=True
-SET(值/函数) 删除老师，执行函数，课程中老师这个字段设置为SET的值或函数的执行结果
# ForeignKey 属性 db_constraint
-ForeignKey是外键---》实际上在数据库会有外键关系
-实际上外键关系有好处---》做约束---》插入数据时，脏数据插入不进去
-坏处--》插入速度慢---》插入的时候要校验约束
-实际编码中，公司里，基本不用外键约束----》这些操作统统由程序员和程序约束--》提高速度
-db_constraint 不建外键约束---》可以基于对象的跨表查询--》基于双下划线的连表查---》一点不受影响
# ForeignKey 属性 related_name
反向操作时，使用的字段名，用于代替原反向查询时的’表名_set’
反向操作：通过课程查询所有章节：course.表名小写_set.all()
如果写了related_name---》course.coursechapters.all()
# ForeignKey 属性 related_query_name
反向查询操作时，使用的连接前缀，用于替换表名。
原来 __链表查询，使用表名小写，写了它后，直接使用这个字段
课程表
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 "%s" % self.name
# 实战课表
class Course(BaseModel):
# choice
course_type = (
(0, '付费'),
(1, '超级VIP专享'),
)
level_choices = (
(0, '初级'),
(1, '中级'),
(2, '高级'),
(3, '特高级'),
(4, '超神'),
)
status_choices = (
(0, '上线'),
(1, '下线'),
(2, '预上线'),
)
# 课程名
name = models.CharField(max_length=128, verbose_name="课程名称")
# 课程图片 null：数据库可以为空，blank:后台管理录入的时候可以不填，
course_img = models.ImageField(upload_to="courses", max_length=255, verbose_name="封面图片", blank=True, null=True)
# 付费类型
course_type = models.SmallIntegerField(choices=course_type, default=0, verbose_name="付费类型")
# 详情介绍--》课程详情页面---》TextField---》bbs项目的文章详情，html内容
brief = models.TextField(max_length=2048, verbose_name="详情介绍", null=True, blank=True)
# 难度等级
level = models.SmallIntegerField(choices=level_choices, default=0, verbose_name="难度等级")
# 发布日期 课程录入一个时间---》没有发布---》发布是在网站上可以看到了
pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)
# 建议学习周期
period = models.IntegerField(verbose_name="建议学习周期(day)", default=7)
# 课件路径--》课程有课件 ppt，png，md---》压缩成zip
attachment_path = models.FileField(upload_to="attachment", max_length=128, verbose_name="课件路径", blank=True,
null=True)
# 课程状态
status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="课程状态")
# 学习人数 ---》优化字段，正常课程跟用户是有关系的，不需要关联查询统计用户个数了
students = models.IntegerField(verbose_name="学习人数", default=0)
# 总课时数量---3个章节20课时的内容
sections = models.IntegerField(verbose_name="总课时数量", default=0)
# 课时更新数量 ---》3个章节20课时的内容现在只更新了10个
pub_sections = models.IntegerField(verbose_name="课时更新数量", default=0)
# 课程原价
price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价", default=0)
### 关联字段---》老师---》一个老师有多门课程，关联字段写在多的一方，写在课程中
teacher = models.ForeignKey("Teacher", on_delete=models.DO_NOTHING, null=True, blank=True, verbose_name="授课老师")
### 关联字段---》课程分类--->一个分类下有多个课程，关联字段写在多的一方
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
# 课程章节
class CourseChapter(BaseModel):
# 一对多，写在多的一方
course = models.ForeignKey("Course", related_name='coursechapters', on_delete=models.CASCADE, verbose_name="课程名称")
# 章节数字--->第几章
chapter = models.SmallIntegerField(verbose_name="第几章", default=1)
# 章节标题
name = models.CharField(max_length=128, verbose_name="章节标题")
# 章节介绍
summary = models.TextField(verbose_name="章节介绍", blank=True, null=True)
# 发布日期
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')
)
# 跟章节一对多，关联字段写在多的一方
chapter = models.ForeignKey("CourseChapter", related_name='coursesections', on_delete=models.CASCADE,
verbose_name="课程章节")
# 课时名
name = models.CharField(max_length=128, verbose_name="课时标题")
# 重写字段
orders = models.PositiveSmallIntegerField(verbose_name="课时排序")
# 课时种类：视频，文档，练习
section_type = models.SmallIntegerField(default=2, choices=section_type_choices, verbose_name="课时种类")
# 课时链接：视频地址，文档地址
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")
# 视频时长 ，仅在前端展示使用
duration = models.CharField(verbose_name="视频时长", blank=True, null=True, max_length=32)
# 发布时间
pub_date = models.DateTimeField(verbose_name="发布时间", auto_now_add=True)
# 是否可试看 允许免费看几个视频
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)
# 老师表
class Teacher(BaseModel):
"""导师"""
role_choices = (
(0, '讲师'),
(1, '导师'),
(2, '班主任'),
)
# 老师名
name = models.CharField(max_length=32, verbose_name="导师名")
# 老师身份---》讲师，导师，班主任
role = models.SmallIntegerField(choices=role_choices, default=0, verbose_name="导师身份")
# 职位、职称
title = models.CharField(max_length=64, verbose_name="职位、职称")
# 导师签名
signature = models.CharField(max_length=255, verbose_name="导师签名", help_text="导师签名", blank=True, null=True)
# 老师图片
image = models.ImageField(upload_to="teacher", null=True, verbose_name="导师封面")
# 导师描述-->很详细-->html
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
# 注册app
# 迁移数据
python manage.py makemigrations
python manage.py migrate
# admin中注册
from .models import *
admin.site.register(Teacher)
admin.site.register(CourseCategory)
admin.site.register(Course)
admin.site.register(CourseChapter)
admin.site.register(CourseSection)
课程分类接口
路由
# http://127.0.0.1:8000/api/v1/course/category/
from django.urls import path, include
from rest_framework.routers import SimpleRouter
from .views import CourseCategoryView
router = SimpleRouter()
router.register('category', CourseCategoryView, 'category')
urlpatterns = [
path('', include(router.urls)),
]
视图类
from django.shortcuts import render
# Create your views here.
from .models import CourseCategory
from .serializer import CourseCategorySerializer
from rest_framework.viewsets import GenericViewSet
from rest_framework.mixins import ListModelMixin
class CourseCategoryView(GenericViewSet,ListModelMixin):
queryset = CourseCategory.objects.all().filter(is_delete=False,is_show=True).order_by('orders')
serializer_class =CourseCategorySerializer
序列化类
from rest_framework import serializers
from .models import CourseCategory
class CourseCategorySerializer(serializers.ModelSerializer):
class Meta:
model = CourseCategory
fields = ['id', 'name']
课程列表接口
路由
router.register('actual', CourseView, 'actual')
序列化类
class TeacherSerializer(serializers.ModelSerializer):
class Meta:
model = Teacher
fields = ('id', 'name', 'role_name', 'title', 'signature', 'image', 'brief')
class CourseSerializer(serializers.ModelSerializer):
teacher = TeacherSerializer() # 子序列化，单单条数据，直接子序列化
class Meta:
model = Course
# fields = ['id', 'name'] # 这里要写很多，自定义字段
fields = [
'id',
'name',
'course_img',
'brief', # 课程介绍--->后面课程详情使用同一个序列化类
'attachment_path', # 课件
'pub_sections', # 发布的课时数
'price', # 价格
'students', # 学习人数
'period', # 学习周期
'sections', # 总课时数
'course_type_name', # choice字段---》表模型中写
'level_name', # choice字段---》表模型中写
'status_name', # choice字段---》表模型中写
'teacher', # 表模型中写，序列化类中写，子序列化
'section_list', # 表模型中写 -章节--->Course表中没有---》重写：序列类写，表模型中写
]
视图类
class CourseView(GenericViewSet, ListModelMixin):
queryset = Course.objects.all().filter(is_delete=False, is_show=True).order_by('orders')
serializer_class = CourseSerializer
# 加入分页---》随着课程越来越多，要分页
pagination_class = CommonPageNumberPagination
# 加入排序
filter_backends = [DjangoFilterBackend, OrderingFilter]
ordering_fields = ['price', 'students']
# 加入过滤---》不是按名字搜索的这种过滤，而是按课程分类过滤--》第三方django-filter
filter_fields = ['course_category']
表模型
#### course表模型
@property # 返回课程类型的中文，不这么写，它是一个数字
def course_type_name(self):
return self.get_course_type_display()
def level_name(self):
return self.get_level_display()
def status_name(self):
return self.get_status_display()
@property
def section_list(self):
sections = []
# 如果课时小于等于四条，返回总课时，如果大于4条，最多返回4条
# 第一步：通过课程拿到所有章节
# course_chapter_list=self.coursechapter_set.all() # 不需要
course_chapter_list = self.coursechapters.all()
# 第二步：循环所有章节
for course_chapter in course_chapter_list:
# 第三步：通过章节，拿到该章节的所有课时
course_section_list = course_chapter.coursesections.all()
# 第四步：循环取出所有章节，追加到一个列表中，准备返回
for course_section in course_section_list:
sections.append({
'name': course_section.name,
'section_link': course_section.section_link,
'duration': course_section.duration,
'free_trail': course_section.free_trail,
})
if len(sections) == 4:
return sections
# 在for循环外层
return sections
### Teacher表模型
def role_name(self):
return self.get_role_display()
分页类
from rest_framework.pagination import PageNumberPagination
class CommonPageNumberPagination(PageNumberPagination):
page_size = 2
page_query_param = 'page'
page_size_query_param = 'page_size'
max_page_size = 5
前后端调通
<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(); // 加载课程分类
this.get_course(); // 加载科创城
},
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.$settings.base_url}course/category/`).then(response => {
this.category_list = response.data;
}).catch(() => {
this.$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.$settings.base_url}course/actual/`, {
params: filters
}).then(response => {
// console.log(response.data);
this.course_list = response.data.results;
this.course_total = response.data.count;
// console.log(this.course_list);
}).catch(() => {
this.$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>
课程详情接口
# 课程列表(所有课程:分页，排序。。。)，再加一个课程详情
# 基于原来的课程列表接口，只需要再加入继承一个类：RetrieveModelMixin
class CourseView(GenericViewSet, ListModelMixin,RetrieveModelMixin):
queryset = Course.objects.all().filter(is_delete=False, is_show=True).order_by('orders')
serializer_class = CourseSerializer
课程章节接口
路由
router.register('chapter', CourseChapterView, 'chapter')
视图类
class CourseChapterView(GenericViewSet, ListModelMixin):
queryset = CourseChapter.objects.all().filter(is_show=True,is_delete=False).order_by('orders')
serializer_class =CourseChapterSerializer
filter_backends = [DjangoFilterBackend]
# 加入过滤---》按照课程id过滤--》第三方django-filter
filter_fields = ['course_id']
序列化类
class CourseSectionSerializer(serializers.ModelSerializer):
class Meta:
model = CourseSection
fields = ['name', 'orders', 'section_link', 'duration', 'free_trail']
class CourseChapterSerializer(serializers.ModelSerializer):
# 使用子序列化
coursesections = CourseSectionSerializer(many=True)
class Meta:
model = CourseChapter
# CourseChapter表中隐藏了一个coursesections字段，对象.coursesections
fields = ['id', 'name', 'chapter', 'summary', 'coursesections'] # 返回该章节下的课时
搜索功能
视图类
# 只针对于实战课的搜索接口
class CourseSearchView(GenericViewSet, ListModelMixin):
queryset = Course.objects.all().filter(is_delete=False, is_show=True).order_by('orders')
serializer_class = CourseSerializer
filter_backends = [SearchFilter]
search_fields = ['name',]
# 方便后期扩展
# def list(self, request, *args, **kwargs):
# # 这个查的是实战课
# res=super().list(request, *args, **kwargs)
# # res2=查询免费课
# # res3=查询轻课
#
# # 上面全是取数据库查询
# # 后期改成取es中查询，
# return APIResponse(result={'free_course':'字典','actual_course':res.data})
视频托管
# 图片，视频，一般不放在自己项目中--->只要访问一次图片，就向后端发一次请求--》消耗服务器资源
# 静态类型文件，托管到第三方平台---》花钱---》使用第三方平台的服务器资源和带宽
# 视频托管到云平台了
-阿里 oss
-七牛云存储。。。
# 公司里多种方案---》托管到其他平台
-云平台---》花钱---》七牛云
-公司自己搭建文件服务器
-fastdfs：搭建笔记，python上传：https://zhuanlan.zhihu.com/p/372286804
-Minio：自己搭建Minio，阿里云上--》搭建笔记--》上传下载比较简单
-图形化界面后台，登陆上看到文件
-ceph
。。。
-放到项目中
# 七牛云---》国内go语言推崇者--》项目基本都是go开发的---》许式伟
-go的国内镜像：goproxy.cn 就是七牛云的
-豆瓣python---》python写的
# 七牛云上传
-手动上传---》手动配置视频地址--（不采取）
-前端上传，返回连接地址，提交到咱们自己的后端，存到数据库
-前端把视频传到咱们后端，咱们后端通过python传到七牛云，生成连接，存到数据库
文件上传
from qiniu import Auth, put_file, etag
q = Auth('--', '-')
#要上传的空间
bucket_name = 'lqz'
#上传后保存的文件名
key = '致命诱惑.png'
#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 = './default.png'
ret, info = put_file(token, key, localfile, version='v2')
print(info)
支付接口
订单表设计
# 订单表
# 订单详情表
"""
class Order(models.Model):
# 主键、总金额、订单名、订单号、订单状态、创建时间、支付时间、流水号、支付方式、支付人(外键) - 优惠劵(外键，可为空)
pass
class OrderDetail(models.Model):
# 订单号(外键)、商品(外键)、实价、成交价 - 商品数量
pass
"""
from django.db import models
from user.models import User
from course.models import Course
class Order(models.Model):
"""订单模型"""
status_choices = (
(0, '未支付'),
(1, '已支付'),
(2, '已取消'),
(3, '超时取消'),
)
pay_choices = (
(1, '支付宝'),
(2, '微信支付'),
)
# 订单标题
subject = models.CharField(max_length=150, verbose_name="订单标题")
# 总价格
total_amount = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="订单总价", default=0)
# 订单号--使用uuid生成
out_trade_no = models.CharField(max_length=64, verbose_name="订单号", unique=True)
# 流水号支付宝返回的
trade_no = models.CharField(max_length=64, null=True, verbose_name="流水号")
# 订单状态 待支付，已支付。。。
order_status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="订单状态")
# 微信，支付宝
pay_type = models.SmallIntegerField(choices=pay_choices, default=1, verbose_name="支付方式")
# 支付时间--》支付宝回调回来会有
pay_time = models.DateTimeField(null=True, verbose_name="支付时间")
# 用户表关联
user = models.ForeignKey(User, related_name='order_user', on_delete=models.DO_NOTHING, db_constraint=False,
verbose_name="下单用户")
# 订单创建时间 auto_now_add:新增这个时间可以不传，用当前时间 auto_now：修改时间不传，自动存入当前时间
created_time = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
class Meta:
db_table = "luffy_order"
verbose_name = "订单记录"
verbose_name_plural = "订单记录"
def __str__(self):
return "%s - ￥%s" % (self.subject, self.total_amount)
@property
def courses(self):
data_list = []
for item in self.order_courses.all():
data_list.append({
"id": item.id,
"course_name": item.course.name,
"real_price": item.real_price,
})
return data_list
class OrderDetail(models.Model):
"""订单详情"""
# 跟订单一对多
order = models.ForeignKey(Order, related_name='order_courses', on_delete=models.CASCADE, db_constraint=False,
verbose_name="订单")
# 跟课程一对多
course = models.ForeignKey(Course, related_name='course_orders', on_delete=models.CASCADE, db_constraint=False,
verbose_name="课程")
# 价格
price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程原价")
# 真实价格
real_price = models.DecimalField(max_digits=6, decimal_places=2, verbose_name="课程实价")
class Meta:
db_table = "luffy_order_detail"
verbose_name = "订单详情"
verbose_name_plural = "订单详情"
def __str__(self):
try:
return "%s的订单：%s" % (self.course.name, self.order.out_trade_no)
except:
return super().__str__()
支付接口
支付宝支付二次封装
结构
libs
├── iPay # aliapy二次封装包
│ ├── __init__.py # 包文件
│ ├── pem # 公钥私钥文件夹
│ │ ├── alipay_public_key.pem # 支付宝公钥文件
│ │ ├── app_private_key.pem # 应用私钥文件
│ ├── pay.py # 支付文件
└── └── settings.py # 应用配置
alipay_public_key.pem
-----BEGIN PUBLIC KEY-----
拿应用公钥跟支付宝换来的支付宝公钥
-----END PUBLIC KEY-----
app_private_key.pem
-----BEGIN RSA PRIVATE KEY-----
通过支付宝公钥私钥签发软件签发的应用私钥
-----END RSA PRIVATE KEY---
setting.py
import os
# 应用私钥
APP_PRIVATE_KEY_STRING = open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'pem', 'app_private_key.pem')).read()
# 支付宝公钥
ALIPAY_PUBLIC_KEY_STRING = open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'pem', 'alipay_public_key.pem')).read()
# 应用ID
APP_ID = '2016093000631831'
# 加密方式
SIGN = 'RSA2'
# 是否是支付宝测试环境(沙箱环境)，如果采用真是支付宝环境，配置False
DEBUG = True
# 支付网关
GATEWAY = 'https://openapi.alipaydev.com/gateway.do' if DEBUG else 'https://openapi.alipay.com/gateway.do'
pay.py
from alipay import AliPay
from . import settings
# 支付对象
alipay = AliPay(
appid=settings.APP_ID,
app_notify_url=None,
app_private_key_string=settings.APP_PRIVATE_KEY_STRING,
alipay_public_key_string=settings.ALIPAY_PUBLIC_KEY_STRING,
sign_type=settings.SIGN,
debug=settings.DEBUG
)
# 支付网关
gateway = settings.GATEWA
*init*.py
# 包对外提供的变量
from .pay import gateway, alipay
路由
router.register('pay', OrderView, 'pay')
视图类
class OrderView(GenericViewSet, CreateModelMixin):
# 登陆后才能访问
authentication_classes = [JSONWebTokenAuthentication,]
permission_classes = [IsAuthenticated]
queryset = Order.objects.all()
serializer_class = OrderSerializer
def create(self, request, *args, **kwargs):
serializer = self.get_serializer(data=request.data,context={'request':request})
serializer.is_valid(raise_exception=True)
pay_url = serializer.context.get('pay_url')
self.perform_create(serializer)
return APIResponse(pay_url=pay_url)
序列化类
# 只用来做反序列化--->数据校验-->重写create方法--》存两个表
class OrderSerializer(serializers.ModelSerializer):
# 前端传入的是课程列表[1,2,3,]---》转成[课程对象1，课程对象2，课程对象三]
courses = serializers.PrimaryKeyRelatedField(queryset=Course.objects.all(), many=True)
# 前端传入的是课程列表[1,2,3,]
# courses = serializers.ListField()
class Meta:
model = Order
# 订单标题，总价格，支付方式，courses所有购买的课程id号列表
fields = ('subject', 'total_amount', 'pay_type', 'courses')
def _check_total_amount(self, attrs):
courses = attrs.get('courses') # 列表[课程1，课程2，课程3]
total_amount = attrs.get('total_amount') # 前端传入的总价格
total_price = 0
for course in courses:
total_price += course.price
if total_price != total_amount: # 计算完的价格不等于传入的价格，抛异常
raise ValidationError('total_amount error')
return total_amount
def _get_out_trade_no(self):
import uuid
code = str(uuid.uuid4()) # 分布式id的生成方案：订单号全局唯一，如何生成全局唯一的订单号：uuid，使用当前时间时间戳(重复概率)，雪花算法
return code.replace('-', '')
# 获取支付人
def _get_user(self):
return self.context.get('request').user
# 获取支付链接
def _get_pay_url(self, out_trade_no, total_amount, subject):
from libs import iPay
from django.conf import settings
order_string = iPay.alipay.api_alipay_trade_page_pay(
out_trade_no=out_trade_no,
total_amount=float(total_amount), # 只有生成支付宝链接时，不能用Decimal
subject=subject,
return_url=settings.RETURN_URL, # get回调地址，前台地址
notify_url=settings.NOTIFY_URL, # post回调地址,后台地址
)
pay_url = iPay.gateway + '?' + order_string
# 将支付链接存入，传递给views
self.context['pay_url'] = pay_url
# 入库(两个表)的信息准备
def _before_create(self, attrs, user, out_trade_no):
attrs['user'] = user
attrs['out_trade_no'] = out_trade_no
def validate(self, attrs):
# 1）订单总价校验--
total_amount = self._check_total_amount(attrs)
# 2）生成订单号--》唯一的
out_trade_no = self._get_out_trade_no()
# 3）支付用户：request.user
user = self._get_user()
# 4）支付链接生成
self._get_pay_url(out_trade_no, total_amount, attrs.get('subject'))
# 5）入库(两个表)的信息准备
self._before_create(attrs, user, out_trade_no)
# 代表该校验方法通过，进入入库操作
return attrs
def create(self, validated_data):
courses = validated_data.pop('courses')
# 订单表入库，不需要courses, 订单号，订单标题，订单价格，购买人，支付方式
order = Order.objects.create(**validated_data)
# 订单详情表入库：只需要订单对象，课程对象(courses要拆成一个个course)
for course in courses:
OrderDetail.objects.create(order=order, course=course, price=course.price, real_price=course.price)
return order
支付成功回调接口
from utils.log import logger
# from rest_framework.viewsets import ViewSet
from rest_framework.views import APIView
from rest_framework.response import Response
# 支付回调接口
class SuccessViewSet(APIView):
# 认证取消
authentication_classes = ()
permission_classes = ()
# 支付宝同步回调给前台，在同步通知给后台处理
# 写不写都行---》给咱们前端做二次验证的
def get(self, request, *args, **kwargs):
# return Response('后台已知晓，Over！！！')
# 不能在该接口完成订单修改操作
# 但是可以在该接口中校验订单状态(已经收到支付宝post异步通知，订单已修改)，告诉前台
# print(type(request.query_params)) # django.http.request.QueryDict
# print(type(request.query_params.dict())) # dict
out_trade_no = request.query_params.get('out_trade_no')
try:
Order.objects.get(out_trade_no=out_trade_no, order_status=1)
return APIResponse(status=100,msg='订单支付成功')
except:
return APIResponse(status=101,msg='订单还未支付')
# 支付宝异步回调处理
def post(self, request, *args, **kwargs):
try:
# request.data前端(支付宝)post传给咱们的数据--》request.data--》 QueyDic对象，不允许pop，把它转成字典
result_data = request.data.dict()
# 支付宝给我的订单号---》数据库有个订单号
out_trade_no = result_data.get('out_trade_no')
# 前面-->验证签名才信任支付宝，防止伪造
signature = result_data.pop('sign')
from libs import iPay
result = iPay.alipay.verify(result_data, signature)
if result and result_data["trade_status"] in ("TRADE_SUCCESS", "TRADE_FINISHED"):
# 完成订单修改：订单状态、流水号、支付时间
# 已支付
Order.objects.filter(out_trade_no=out_trade_no).update(order_status=1)
# 完成日志记录
logger.warning('%s订单支付成功' % out_trade_no)
return Response('success')
else:
logger.error('%s订单支付失败' % out_trade_no)
except:
pass
return Response('failed')
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