课程列表页

xiaoxiao2023-11-21 150

课程列表页

前端显示课程列表页面

在xadmin中增加课程列表的链接导航。然后把课程列表页面组件Course.vue放到项目中.

<template> <div class="course"> <Header/> <div class="main">  <div class="top"> <ul class="condition condition1"> <li class="cate-condition">课程分类:</li> <li class="item current">全部</li> <li class="item">Python</li> <li class="item">Linux运维</li> <li class="item">Python进阶</li> <li class="item">开发工具</li> <li class="item">Go语言</li> <li class="item">机器学习</li> <li class="item">技术生涯</li> </ul> <ul class="condition condition2"> <li class="cate-condition">筛选:</li> <li class="item current">默认</li> <li class="item">人气</li> <li class="item price">价格</li> <li class="course-length">共21个课程</li> </ul> </div>  <div class="list"> <ul> <li class="course-item"> <router-link to="/detail" class="course-link"> <div class="course-cover"> <img src="../../static/course/1544059695.jpeg" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>Python开发21天入门</h3> <span>46520人已加入学习</span> </div> <p class="teacher"> <span class="info">Alex 金角大王老男孩Python教学总监</span> <span class="lesson">共154课时/更新完成</span> </p> <ul class="lesson-list"> <li> <p class="lesson-title">01 | 常用模块学习-模块的种类和导入方法</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">02 | 编程语言介绍（三）高级语言</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">03 | 编程语言介绍（一）</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">04 | 课程介绍（二）-Python与其他语言的区别</p> <span class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：9.00元</span> <button class="buy-now">立即购买</button> </div> </div> </router-link> </li> <li class="course-item"> <div class="course-cover"> <img src="../../static/course/1544059695.jpeg" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>Python开发21天入门</h3> <span>46520人已加入学习</span> </div> <p class="teacher"> <span class="info">Alex 金角大王老男孩Python教学总监</span> <span class="lesson">共154课时/更新完成</span> </p> <ul class="lesson-list"> <li> <p class="lesson-title">01 | 常用模块学习-模块的种类和导入方法</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">02 | 编程语言介绍（三）高级语言</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">03 | 编程语言介绍（一）</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">04 | 课程介绍（二）-Python与其他语言的区别</p> <span class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：9.00元</span> <button class="buy-now">立即购买</button> </div> </div> </li> <li class="course-item"> <div class="course-cover"> <img src="../../static/course/1544059695.jpeg" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>Python开发21天入门</h3> <span>46520人已加入学习</span> </div> <p class="teacher"> <span class="info">Alex 金角大王老男孩Python教学总监</span> <span class="lesson">共154课时/更新完成</span> </p> <ul class="lesson-list"> <li> <p class="lesson-title">01 | 常用模块学习-模块的种类和导入方法</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">02 | 编程语言介绍（三）高级语言</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">03 | 编程语言介绍（一）</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">04 | 课程介绍（二）-Python与其他语言的区别</p> <span class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：9.00元</span> <button class="buy-now">立即购买</button> </div> </div> </li> <li class="course-item"> <div class="course-cover"> <img src="../../static/course/1544059695.jpeg" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>Python开发21天入门</h3> <span>46520人已加入学习</span> </div> <p class="teacher"> <span class="info">Alex 金角大王老男孩Python教学总监</span> <span class="lesson">共154课时/更新完成</span> </p> <ul class="lesson-list"> <li> <p class="lesson-title">01 | 常用模块学习-模块的种类和导入方法</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">02 | 编程语言介绍（三）高级语言</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">03 | 编程语言介绍（一）</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">04 | 课程介绍（二）-Python与其他语言的区别</p> <span class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：9.00元</span> <button class="buy-now">立即购买</button> </div> </div> </li> </ul> </div> </div> <Footer/> </div> </template> <script> import Header from "./common/Header" import Footer from "./common/Footer" export default { name: "Course", data(){ return { } }, components:{Header,Footer} } </script> <style scoped> .main{ width: 1100px; height: auto; margin: 0 auto; padding-top: 35px; } .main .top{ margin-bottom: 35px; padding: 25px 30px 25px 20px; background: #fff; border-radius: 4px; box-shadow: 0 2px 4px 0 #f0f0f0; } .condition{ border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); padding-bottom: 18px; margin-bottom: 17px; overflow: hidden; } .condition li{ float: left; } .condition .cate-condition{ color: #888; font-size: 16px; } .condition .item{ padding: 6px 16px; line-height: 16px; margin-left: 14px; position: relative; transition: all .3s ease; cursor: pointer; color: #4a4a4a; } .condition1 .current{ color: #ffc210; border: 1px solid #ffc210!important; border-radius: 30px; } .condition2 .current{ color: #ffc210; } .condition .price:before{ content: ""; width: 0; border: 5px solid transparent; border-top-color: #d8d8d8; position: absolute; right: 0; bottom: 2.5px; } .condition .price:after{ content: ""; width: 0; border: 5px solid transparent; border-bottom-color: #ffc210; position: absolute; right: 0; top: 2.5px; } .condition2 .course-length{ float: right; font-size: 14px; color: #9b9b9b; } .course-item{ 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); transition: all .2s ease; overflow: hidden; cursor:pointer; } .course-link{ overflow: hidden; } .course-cover { width: 423px; height: 210px; margin-right: 30px; float: left; } .course-info{ width: 597px; float: left; } .course-title{ margin-bottom: 8px; overflow: hidden; } .course-title h3{ font-size: 26px; color: #333; float: left; } .course-title span { float: right; font-size: 14px; color: #9b9b9b; margin-top: 12px; text-indent: 1em; /* 缩进 2字符宽度 */ background: url("../assets/people.svg") no-repeat 0px 3px; } .teacher{ justify-content: space-between; font-size: 14px; color: #9b9b9b; margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); } .teacher .lesson{ float: right; } .lesson-list{ overflow: hidden; } .lesson-list li{ width: 49%; margin-bottom: 15px; cursor: pointer; float: left; margin-right:1%; } .lesson-list li .player{ width: 16px; height: 16px; vertical-align: text-bottom; } .lesson-list li .lesson-title { display: inline-block; max-width: 227px; text-overflow: ellipsis; /* 如果字体太多超出元素的宽度，则添加省略符号 */ color: #666; overflow: hidden; white-space: nowrap; font-size: 14px; vertical-align: text-bottom; /* 文本的垂直对齐方式： text-botton 文本底部对齐 */ text-indent: 1.5em; background: url(../../static/player.svg) no-repeat 0px 3px; } .lesson-list .free{ width: 34px; height: 20px; color: #fd7b4d; margin-left: 10px; border: 1px solid #fd7b4d; border-radius: 2px; text-align: center; font-size: 13px; white-space: nowrap; } .lesson-list li:hover .lesson-title{ color: #ffc210; background-image: url(../../static/player2.svg); } .lesson-list li:hover .free{ border-color: #ffc210; color: #ffc210; } .buy-info .discount{ padding: 0px 10px; font-size: 16px; color: #fff; display: inline-block; height: 36px; text-align: center; margin-right: 8px; background: #fa6240; border: 1px solid #fa6240; border-radius: 10px 0 10px 0; line-height: 36px; } .present-price{ font-size: 24px; color: #fa6240; } .original-price{ text-decoration: line-through; font-size: 14px; color: #9b9b9b; margin-left: 10px; } .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; /* 过渡动画 */ float: right; margin-top: 5px; } .buy-now:hover{ color: #fff; background: #ffc210; border: 1px solid #ffc210; cursor: pointer; } </style>

注册路由

import Course from "../components/Course" .... { name:"Course", path: "/course", component: Course, }

分析课程列表页面中的出现的数据之间的关系

课程分类: 课程信息: 课程章节: 课时信息: 老师信息: 价格策略:(限时免费\限时折扣\限时满减\原价)

课程子应用创建

python ../../manage.py startapp courses

注册子应用

INSTALLED_APPS = [ ... 'courses', ]

数据模型创建

from django.db import models from luffy.utils.models import BaseModel # Create your models here. class CourseCategory(BaseModel): """ 课程分类 """ name = models.CharField(max_length=64, unique=True, verbose_name="分类名称") class Meta: db_table = "ly_course_category" verbose_name = "课程分类" verbose_name_plural = "课程分类" def __str__(self): return "%s" % self.name class Course(BaseModel): """ 专题课程 """ 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=1, 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(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") course_category = models.ForeignKey("CourseCategory", on_delete=models.CASCADE, null=True, blank=True,verbose_name="课程分类") students = models.IntegerField(verbose_name="学习人数",default = 0) lessons = models.IntegerField(verbose_name="总课时数量",default = 0) pub_lessons = 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") class Meta: db_table = "ly_course" verbose_name = "专题课程" verbose_name_plural = "专题课程" def __str__(self): return "%s" % self.name class Teacher(BaseModel): """讲师、导师表""" role_choices = ( (0, '讲师'), (1, '导师'), (2, '班主任'), ) name = models.CharField(max_length=32, verbose_name="讲师title") role = models.SmallIntegerField(choices=role_choices, default=0, verbose_name="讲师身份") 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 = "讲师封面") brief = models.TextField(max_length=1024, verbose_name="讲师描述") class Meta: db_table = "ly_teacher" verbose_name = "讲师导师" verbose_name_plural = "讲师导师" def __str__(self): return "%s" % self.name class CourseChapter(BaseModel): """课程章节""" 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 = "ly_course_chapter" verbose_name = "课程章节" verbose_name_plural = "课程章节" def __str__(self): return "%s:(第%s章)%s" % (self.course, self.chapter, self.name) class CourseLesson(BaseModel): """课程课时""" 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) # 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) class Meta: db_table = "ly_course_lesson" verbose_name = "课程课时" verbose_name_plural = "课程课时" def __str__(self): return "%s-%s" % (self.chapter, self.name)

执行数据迁移

python manage.py makemigrations python manage.py migrate

执行数据库时,如果发生以下错误

则到 django/db/backends/utils.py : 237,修改代码如下:

if value is None: return None if isinstance(value, decimal.Decimal): context = decimal.getcontext().copy() if max_digits is not None: # 增加转型类型转换 context.prec = int(max_digits) if decimal_places is not None: # 增加转型类型转换 value = value.quantize(decimal.Decimal(1).scaleb(-int(decimal_places)), context=context) else: context.traps[decimal.Rounded] = 1 value = context.create_decimal(value) return "{:f}".format(value) if decimal_places is not None: return "%.*f" % (decimal_places, value) return "{:f}".format(value)

把当前新增的课程模型注册到xadmin里面.

coursers/adminx.py,代码:

import xadmin from .models import CourseCategory class CourseCategoryModelAdmin(object): """课程分类模型管理类""" pass xadmin.site.register(CourseCategory, CourseCategoryModelAdmin) from .models import Course class CourseModelAdmin(object): """课程模型管理类""" pass xadmin.site.register(Course, CourseModelAdmin) from .models import Teacher class TeacherModelAdmin(object): """老师模型管理类""" pass xadmin.site.register(Teacher, TeacherModelAdmin) from .models import CourseChapter class CourseChapterModelAdmin(object): """课程章节模型管理类""" pass xadmin.site.register(CourseChapter, CourseChapterModelAdmin) from .models import CourseLesson class CourseLessonModelAdmin(object): """课程课时模型管理类""" pass xadmin.site.register(CourseLesson, CourseLessonModelAdmin)

添加测试数据

后端实现课程分类列表接口

创建序列化器

courses/serializers.py

from rest_framework import serializers from .models import CourseCategory class CourseCategoryModelSerializer(serializers.ModelSerializer): class Meta: model = CourseCategory fields = ("id","name")

创建视图

courses/views.py

# Create your views here. from rest_framework.generics import ListAPIView from .models import CourseCategory from .serializers import CourseCategoryModelSerializer class CourseCategoryAPIView(ListAPIView): """课程分类列表""" queryset = CourseCategory.objects.filter( is_delete=False, is_show=True ).order_by("-orders") serializer_class = CourseCategoryModelSerializer

注册路由

from django.urls import path from . import views urlpatterns = [ path(r"cate/",views.CourseCategoryAPIView.as_view()), ] # 总路由 path('courses/', include("courses.urls")),

客户端发送请求获取课程分类信息

<template> <div class="course"> <Header/> <div class="main">  <div class="top"> <ul class="condition condition1"> <li class="cate-condition">课程分类:</li> <li class="item current">全部</li> <li v-for="catetory in catetory_list" :data-key="catetory.id" class="item">{{catetory.name}}</li> </ul> <ul class="condition condition2"> <li class="cate-condition">筛选:</li> <li class="item current">默认</li> <li class="item">人气</li> <li class="item price">价格</li> <li class="course-length">共21个课程</li> </ul> </div> 。。。。 </div> </template> <script> import Header from "./common/Header" import Footer from "./common/Footer" export default { name: "Course", data(){ return { catetory_list:[], } }, components: {Header, Footer}, created(){ // 获取课程分类 this.$axios.get(this.$settings.Host+"/courses/cate/").then(response=>{ this.catetory_list = response.data }).catch(error=>{ console.log(error.response) }); }, } </script>

完善课程分类筛选的前端特效

后端实现课程信息列表接口

创建序列化器，代码

# 开发中一个序列化器 A 中需要同时序列化其他模型 B 的数据返回给客户端,那么直接通过外键默认只会返回主键ID # 所以我们可以通过再创建一个模型B的序列化器,对模型B的数据进行序列化 # 在序列化器A中直接把模型B的序列化器调用作为字段值来声明即可. from .models import Teacher class TeacherSerializer(serializers.ModelSerializer): class Meta: model = Teacher fields = ("id","name","title") from .models import Course class CourseSerializer(serializers.ModelSerializer): # 这里调用的序列化器,必须事先在前面已经声明好的,否则报错 teacher = TeacherSerializer() class Meta: model= Course fields = ("id","name","course_img","students","lessons","pub_lessons","price","teacher")

视图代码:

from .serializers import CourseModelSerializer class CourseAPIView(ListAPIView): queryset = Course.objects.filter(is_delete=False, is_show=True).order_by("orders") serializer_class = CourseModelSerializer

路由代码：

path(r"list/",views.CourseAPIView.as_view()),

客户端发送请求获取课程列表信息

<template> <div class="course"> <Header/> <div class="main">  <div class="top"> <ul class="condition condition1"> <li class="cate-condition">课程分类:</li> <li class="item" :class="current_cate==0?'current':''" @click="current_cate=0">全部</li> <li :class="current_cate==catetory.id?'current':''" @click="current_cate=catetory.id" v-for="catetory in catetory_list" :data-key="catetory.id" class="item">{{catetory.name}}</li> </ul> <ul class="condition condition2"> <li class="cate-condition">筛选:</li> <li class="item current">默认</li> <li class="item">人气</li> <li class="item price">价格</li> <li class="course-length">共21个课程</li> </ul> </div>  <div class="list"> <ul> <li class="course-item" v-for="course in course_list"> <router-link to="/detail" class="course-link"> <div class="course-cover"> <img :src="course.course_img" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>{{course.name}}</h3> <span>{{course.students}}人已加入学习</span> </div> <p class="teacher"> <span class="info">{{course.teacher.name}} {{course.teacher.title}}</span> <span class="lesson">共{{course.lessons}}课时/{{course.lessons==course.pub_lessons?'更新完成':('已更新'+course.pub_lessons+"课时")}}</span> </p> <ul class="lesson-list"> <li> <p class="lesson-title">01 | 常用模块学习-模块的种类和导入方法</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">02 | 编程语言介绍（三）高级语言</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">03 | 编程语言介绍（一）</p> <span class="free">免费</span> </li> <li> <p class="lesson-title">04 | 课程介绍（二）-Python与其他语言的区别</p> <span class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：{{course.price}}元</span> <button class="buy-now">立即购买</button> </div> </div> </router-link> </li>                                                                                                                      </ul> </div> </div> <Footer/> </div> </template> <script> import Header from "./common/Header" import Footer from "./common/Footer" export default { name: "Course", data(){ return { catetory_list:[], course_list:[], current_cate:0, } }, components: {Header, Footer}, created(){ // 获取课程分类 this.$axios.get(this.$settings.Host+"/courses/cate/").then(response=>{ this.catetory_list = response.data }).catch(error=>{ console.log(error.response) }); // 获取课程信息 this.$axios.get(this.$settings.Host+"/courses/list/").then(response=>{ this.course_list = response.data }).catch(error=>{ console.log(error.response) }); }, methods:{ } } </script> <style scoped> .main{ width: 1100px; height: auto; margin: 0 auto; padding-top: 35px; } .main .top{ margin-bottom: 35px; padding: 25px 30px 25px 20px; background: #fff; border-radius: 4px; box-shadow: 0 2px 4px 0 #f0f0f0; } .condition{ border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); padding-bottom: 18px; margin-bottom: 17px; overflow: hidden; } .condition li{ float: left; } .condition .cate-condition{ color: #888; font-size: 16px; } .condition .item{ padding: 6px 16px; line-height: 16px; margin-left: 14px; position: relative; transition: all .3s ease; border:1px solid transparent; /* transparent 透明 */ cursor: pointer; color: #4a4a4a; } .condition1 .current{ color: #ffc210; border: 1px solid #ffc210!important; border-radius: 30px; } .condition2 .current{ color: #ffc210; } .condition .price:before{ content: ""; width: 0; border: 5px solid transparent; border-top-color: #d8d8d8; position: absolute; right: 0; bottom: 2.5px; } .condition .price:after{ content: ""; width: 0; border: 5px solid transparent; border-bottom-color: #ffc210; position: absolute; right: 0; top: 2.5px; } .condition2 .course-length{ float: right; font-size: 14px; color: #9b9b9b; } .course-item{ 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); transition: all .2s ease; overflow: hidden; cursor:pointer; } .course-link{ overflow: hidden; } .course-cover { width: 423px; height: 210px; margin-right: 30px; float: left; } .course-info{ width: 597px; float: left; } .course-title{ margin-bottom: 8px; overflow: hidden; } .course-title h3{ font-size: 26px; color: #333; float: left; } .course-title span { float: right; font-size: 14px; color: #9b9b9b; margin-top: 12px; text-indent: 1em; /* 缩进 2字符宽度 */ background: url("../assets/people.svg") no-repeat 0px 3px; } .teacher{ justify-content: space-between; font-size: 14px; color: #9b9b9b; margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); } .teacher .lesson{ float: right; } .lesson-list{ overflow: hidden; } .lesson-list li{ width: 49%; margin-bottom: 15px; cursor: pointer; float: left; margin-right:1%; } .lesson-list li .player{ width: 16px; height: 16px; vertical-align: text-bottom; } .lesson-list li .lesson-title { display: inline-block; max-width: 227px; text-overflow: ellipsis; /* 如果字体太多超出元素的宽度，则添加省略符号 */ color: #666; overflow: hidden; white-space: nowrap; font-size: 14px; vertical-align: text-bottom; /* 文本的垂直对齐方式： text-botton 文本底部对齐 */ text-indent: 1.5em; background: url(../../static/player.svg) no-repeat 0px 3px; } .lesson-list .free{ width: 34px; height: 20px; color: #fd7b4d; margin-left: 10px; border: 1px solid #fd7b4d; border-radius: 2px; text-align: center; font-size: 13px; white-space: nowrap; } .lesson-list li:hover .lesson-title{ color: #ffc210; background-image: url(../../static/player2.svg); } .lesson-list li:hover .free{ border-color: #ffc210; color: #ffc210; } .buy-info .discount{ padding: 0px 10px; font-size: 16px; color: #fff; display: inline-block; height: 36px; text-align: center; margin-right: 8px; background: #fa6240; border: 1px solid #fa6240; border-radius: 10px 0 10px 0; line-height: 36px; } .present-price{ font-size: 24px; color: #fa6240; } .original-price{ text-decoration: line-through; font-size: 14px; color: #9b9b9b; margin-left: 10px; } .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; /* 过渡动画 */ float: right; margin-top: 5px; } .buy-now:hover{ color: #fff; background: #ffc210; border: 1px solid #ffc210; cursor: pointer; } </style>

客户端的课程列表显示当前课程的章节信息

可以通过序列化器嵌套来完成，但是查询过程的数量不好控制。以下代码仅供参考：

from .models import CourseLesson class CourseLessonModelSerializer(serializers.ModelSerializer): class Meta: model = CourseLesson fields = ("id","name","free_trail") from .models import CourseChapter class CourseChapterModelSerializer(serializers.ModelSerializer): coursesections = CourseLessonModelSerializer(many=True) class Meta: model = CourseChapter fields = ("id", "name", "coursesections") from .models import Course class CourseModelSerializer(serializers.ModelSerializer): teacher = TeacherModelSerializer() coursechapters = CourseChapterModelSerializer(many=True) # 课程章节多个,所以需要声明 many=True class Meta: model = Course fields = ("id", "name", "course_img", "students", "lessons", "pub_lessons", "price", "teacher","coursechapters")

我们可以通过在models模型中给数据模型增加自定义字段来完成获取课时功能。

class Course(BaseModel): """ 专题课程 """ 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=1, 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(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") course_category = models.ForeignKey("CourseCategory", on_delete=models.CASCADE, null=True, blank=True,verbose_name="课程分类") students = models.IntegerField(verbose_name="学习人数",default = 0) lessons = models.IntegerField(verbose_name="总课时数量",default = 0) pub_lessons = 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") class Meta: db_table = "ly_course" verbose_name = "专题课程" verbose_name_plural = "专题课程" def __str__(self): return "%s" % self.name def lesson_list(self): """获取当前课程的前8个课时展示到列表中""" # 获取所有章节 chapters_list = self.coursechapters.filter(is_delete=False,is_show=True) lesson_list = [] if chapters_list: for chapter in chapters_list: lessons = chapter.coursesections.filter(is_delete=False,is_show=True)[:4] if lessons: for lesson in lessons: lesson_list.append({ "id":lesson.id, "name":lesson.name, "free_trail":lesson.free_trail }) return lesson_list[:4]

序列化器字段增加自定义的模型字段，

class CourseModelSerializer(serializers.ModelSerializer): # 默认情况,序列化器转换模型数据时,默认会把外键直接转成主键ID值 # 所以我们需要重新设置在序列化器中针对外键的序列化 # 这种操作就是一个序列器里面调用另一个序列化器了.叫"序列化器嵌套" teacher = TeacherModelSerializer() # coursechapters = CourseChapterModelSerializer(many=True) class Meta: model = Course fields = ("id","name","course_img","students","lessons","pub_lessons","price","teacher","lesson_list")

前端显示课程章节信息

按照指定分类显示课程信息

在当前项目中安装字段过滤排序

pip install django-filter

在settings/dev.py配置文件中增加过滤后端的设置：

INSTALLED_APPS = [ ... 'django_filters', # 需要注册应用， ]

在视图中设置允许过滤的字段名和引入过滤字段核心类

from .serializers import CourseModelSerializer from django_filters.rest_framework import DjangoFilterBackend class CourseAPIView(ListAPIView): queryset = Course.objects.filter(is_delete=False, is_show=True).order_by("orders") serializer_class = CourseModelSerializer filter_backends = [DjangoFilterBackend, ] filter_fields = ('course_category',)

排序显示课程

后端提供排序课程的接口

把原来views.py中的CoursesAPIView新增两句代码:

from .models import Course from .serializers import CourseModelSerializer from rest_framework.filters import OrderingFilter from django_filters.rest_framework import DjangoFilterBackend class CourseAPIView(ListAPIView): queryset = Course.objects.filter(status=0).order_by("-orders","-id") serializer_class = CourseModelSerializer # 设置价格排序 filter_backends = [DjangoFilterBackend,OrderingFilter] filter_fields = ('course_category',) ordering_fields = ('id', 'students', 'price')

前端根据排序字段对应的课程顺序

组件html代码

<template> <div class="course"> <Header/> <div class="main">  <div class="top"> <ul class="condition condition1"> <li class="cate-condition">课程分类:</li> <li class="item" :class="query_params.course_category==0?'current':''" @click="query_params.course_category=0">全部</li> <li :class="query_params.course_category==catetory.id?'current':''" @click="query_params.course_category=catetory.id" v-for="catetory in catetory_list" :data-key="catetory.id" class="item">{{catetory.name}}</li> </ul> <ul class="condition condition2"> <li class="cate-condition">筛选:</li> <li class="item" :class="(query_params.ordering=='-id' || query_params.ordering=='id')?'current':''" @click="select_ordering('id')">默认</li> <li class="item" :class="(query_params.ordering=='-students' || query_params.ordering=='students')?'current':''" @click="select_ordering('students')">人气</li> <li class="item" :class="query_params.ordering=='price'?'current price':(query_params.ordering=='-price'?'current price2':'')" @click="select_ordering('price')">价格</li> <li class="course-length">共21个课程</li> </ul> </div>  <div class="list"> <ul> <li class="course-item" v-for="course in course_list"> <router-link to="/detail" class="course-link"> <div class="course-cover"> <img :src="course.course_img" alt=""> </div> <div class="course-info"> <div class="course-title"> <h3>{{course.name}}</h3> <span>{{course.students}}人已加入学习</span> </div> <p class="teacher"> <span class="info">{{course.teacher.name}} {{course.teacher.title}}</span> <span class="lesson">共{{course.lessons}}课时/{{course.lessons==course.pub_lessons?'更新完成':('已更新'+course.pub_lessons+"课时")}}</span> </p> <ul class="lesson-list"> <li v-for="lesson,key in course.lesson_list"> <p class="lesson-title">0{{key+1}} | {{lesson.name}}</p> <span v-if="lesson.free_trail" class="free">免费</span> </li> </ul> <div class="buy-info"> <span class="discount">限时免费</span> <span class="present-price">￥0.00元</span> <span class="original-price">原价：{{course.price}}元</span> <button class="buy-now">立即购买</button> </div> </div> </router-link> </li> </ul> </div> </div> <Footer/> </div> </template> <script> import Header from "./common/Header" import Footer from "./common/Footer" export default { name: "Course", data(){ return { catetory_list:[], course_list:[], query_params:{ course_category: 0, ordering:"-id", } } }, watch:{ // 每次点击不同课程时,要重新获取课程列表 "query_params.course_category":function(){ this.get_course_list(); }, "query_params.ordering":function(){ this.get_course_list(); }, }, components: {Header, Footer}, created(){ // 获取课程分类 this.$axios.get(this.$settings.Host+"/courses/cate/").then(response=>{ this.catetory_list = response.data }).catch(error=>{ console.log(error.response) }); // 获取课程信息 this.get_course_list() }, methods:{ select_ordering(selector){ // 默认排序 if(this.query_params.ordering==('-'+selector) ){ this.query_params.ordering = selector; }else{ this.query_params.ordering = '-'+selector; } }, get_course_list(){ let query_params = {ordering:this.query_params.ordering}; if( this.query_params.course_category != 0 ){ query_params.course_category = this.query_params.course_category; } this.$axios.get(this.$settings.Host+"/courses/list/",{ params: query_params }).then(response=>{ this.course_list = response.data }).catch(error=>{ console.log(error.response) }); } } } </script> <style scoped> .main{ width: 1100px; height: auto; margin: 0 auto; padding-top: 35px; } .main .top{ margin-bottom: 35px; padding: 25px 30px 25px 20px; background: #fff; border-radius: 4px; box-shadow: 0 2px 4px 0 #f0f0f0; } .condition{ border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); padding-bottom: 18px; margin-bottom: 17px; overflow: hidden; } .condition li{ float: left; } .condition .cate-condition{ color: #888; font-size: 16px; } .condition .item{ padding: 6px 16px; line-height: 16px; margin-left: 14px; position: relative; transition: all .3s ease; border:1px solid transparent; /* transparent 透明 */ cursor: pointer; color: #4a4a4a; } .condition1 .current{ color: #ffc210; border: 1px solid #ffc210!important; border-radius: 30px; } .condition2 .current{ color: #ffc210; } .condition .price:before{ content: ""; width: 0; border: 5px solid transparent; border-top-color: #d8d8d8; position: absolute; right: 0; bottom: 2.5px; } .condition .price2:before{ content: ""; width: 0; border: 5px solid transparent; position: absolute; right: 0; bottom: 2.5px; border-top-color: #ffc210; } .condition .price2:after{ content: ""; width: 0; border: 5px solid transparent; position: absolute; right: 0; top: 2.5px; border-bottom-color: #d8d8d8; } .condition .price:after{ content: ""; width: 0; border: 5px solid transparent; border-bottom-color: #ffc210; position: absolute; right: 0; top: 2.5px; } .condition2 .course-length{ float: right; font-size: 14px; color: #9b9b9b; } .course-item{ 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); transition: all .2s ease; overflow: hidden; cursor:pointer; } .course-link{ overflow: hidden; } .course-cover { width: 423px; height: 210px; margin-right: 30px; float: left; } .course-info{ width: 597px; float: left; } .course-title{ margin-bottom: 8px; overflow: hidden; } .course-title h3{ font-size: 26px; color: #333; float: left; } .course-title span { float: right; font-size: 14px; color: #9b9b9b; margin-top: 12px; text-indent: 1em; /* 缩进 2字符宽度 */ background: url("../assets/people.svg") no-repeat 0px 3px; } .teacher{ justify-content: space-between; font-size: 14px; color: #9b9b9b; margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid #333; border-bottom-color: rgba(51,51,51,.05); } .teacher .lesson{ float: right; } .lesson-list{ overflow: hidden; } .lesson-list li{ width: 49%; margin-bottom: 15px; cursor: pointer; float: left; margin-right:1%; } .lesson-list li .player{ width: 16px; height: 16px; vertical-align: text-bottom; } .lesson-list li .lesson-title { display: inline-block; max-width: 227px; text-overflow: ellipsis; /* 如果字体太多超出元素的宽度，则添加省略符号 */ color: #666; overflow: hidden; white-space: nowrap; font-size: 14px; vertical-align: text-bottom; /* 文本的垂直对齐方式： text-botton 文本底部对齐 */ text-indent: 1.5em; background: url(../../static/player.svg) no-repeat 0px 3px; } .lesson-list .free{ width: 34px; height: 20px; color: #fd7b4d; margin-left: 10px; border: 1px solid #fd7b4d; border-radius: 2px; text-align: center; font-size: 13px; white-space: nowrap; } .lesson-list li:hover .lesson-title{ color: #ffc210; background-image: url(../../static/player2.svg); } .lesson-list li:hover .free{ border-color: #ffc210; color: #ffc210; } .buy-info .discount{ padding: 0px 10px; font-size: 16px; color: #fff; display: inline-block; height: 36px; text-align: center; margin-right: 8px; background: #fa6240; border: 1px solid #fa6240; border-radius: 10px 0 10px 0; line-height: 36px; } .present-price{ font-size: 24px; color: #fa6240; } .original-price{ text-decoration: line-through; font-size: 14px; color: #9b9b9b; margin-left: 10px; } .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; /* 过渡动画 */ float: right; margin-top: 5px; } .buy-now:hover{ color: #fff; background: #ffc210; border: 1px solid #ffc210; cursor: pointer; } </style>

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