目录

在线教育平台(一)      在线教育平台(二)

在线教育平台(三)      在线教育平台(四)

在线教育平台(五)      在线教育平台(六)

在线教育平台(七)      在线教育平台(八)

在线教育平台(九)      在线教育平台(十)

代码

github下载

教程

学习自慕课网-使用python3.x与Django2.0.1开发的在线教育平台

八、课程详情页功能的实现

8.1.课程列表

(1)配置urls

MxOnline/urls中

path("course/", include('course.urls', namespace="course")),

course里面新建urls.py

# course/urls.py

from django.urls import path,re_path
from .views import CourseListView # 要写上app的名字
app_name = "course" urlpatterns = [
path('list/',CourseListView.as_view(),name='course_list'), ]

把course-list.html拷贝到templates目录下

from django.shortcuts import render
from django.views.generic import View class CourseListView(View):
def get(self, request):
return render(request, "course-list.html")

(2)course-list.html继承base.html

修改title,修改bread里面,content里面放course-list独有的

{#templates/course-list.html#}

{% extends 'base.html' %}
{% load staticfiles %}
{% block title %}公开课列表{% endblock %} {% block custom_bread %}
<section>
<div class="wp">
<ul class="crumbs">
<li><a href="index.html">首页</a>></li>
<li>公开课</li>
</ul>
</div>
</section>
{% endblock %}
{% block content %}
<section>
<div class="wp">
<div class="list" style="margin-top:0;">
<div class="left layout">
<div class="head">
<ul class="tab_header">
<li class="active"><a href="?sort=">最新 </a></li>
<li ><a href="?sort=hot">最热门</a></li>
<li ><a href="?sort=students">参与人数</a></li>
</ul>
</div>
<div id="inWindow">
<div class="tab_cont " id="content">
<div class="group_list"> <div class="box">
<a href="course-detail.html">
<img width="280" height="350" class="scrollLoading" src="{% static 'media/courses/2016/12/mysql.jpg' %}"/>
</a>
<div class="des">
<a href="course-detail.html">
<h2>xadmin进阶开发</h2>
</a>
<span class="fl">时长:<i class="key">30</i></span>
<span class="fr">学习人数:2&nbsp;&nbsp;</span>
</div>
<div class="bottom">
<a href="course-detail.html"><span class="fl">来自慕课网</span></a>
<span class="star fr notlogin
" data-favid="15">
1
</span>
</div>
</div> </div>
<div class="pageturn">
<ul class="pagelist"> <li class="active"><a href="?page=1">1</a></li> <li><a href="?page=2" class="page">2</a></li> <li class="long"><a href="?page=2">下一页</a></li> </ul>
</div>
</div>
</div>
</div>
<div class="right layout">
<div class="head">热门课程推荐</div>
<div class="group_recommend"> <dl>
<dt>
<a target="_blank" href="">
<img width="240" height="220" class="scrollLoading" src="{% static 'media/courses/2016/11/540e57300001d6d906000338-240-135_n0L8vbw.jpg' %}"/>
</a>
</dt>
<dd>
<a target="_blank" href=""><h2> django与vuejs实战项目2</h2></a>
<span class="fl">难度:<i class="key">高级</i></span>
</dd>
</dl> </div>
</div>
</div>
</div>
</section>
{% endblock %}

course-list.html

然后去后台添加十门课程

(3)列表展示

views.py

# course/views.py

from django.shortcuts import render
from django.views.generic import View
from .models import Course class CourseListView(View):
def get(self, request):
all_courses = Course.objects.all() return render(request, "course-list.html",{'all_courses':all_courses})

course-list.html

 <div class="group_list">
{% for course in all_course %}
<div class="box">
<a href="course-detail.html">
<img width="280" height="350" class="scrollLoading" src="{{ MEDIA_URL }}{{ course.image }}"/>
</a>
<div class="des">
<a href="course-detail.html">
<h2>{{ course.name }}</h2>
</a>
<span class="fl">时长:<i class="key">{{ course.learn_times }}</i></span>
<span class="fr">学习人数:{{ course.students }}&nbsp;&nbsp;</span>
</div>
<div class="bottom">
<a href="course-detail.html"><span class="fl">来自{{ course.course_org.name }}</span></a>
<span class="star fr notlogin
" data-favid="15">
{{ course.fav_nums }}
</span>
</div>
</div>
{% endfor %}

8.2.分页

        try:
page = request.GET.get('page', 1)
except PageNotAnInteger:
page = 1
p = Paginator(all_courses,2 , request=request)
courses = p.page(page)
<div class="pageturn">
<ul class="pagelist">
{% if all_courses.has_previous %}
<li class="long"><a href="?{{ all_courses.previous_page_number.querystring }}">上一页</a></li>
{% endif %} {% for page in all_courses.pages %}
{% if page %}
{% ifequal page all_courses.number %}
<li class="active"><a href="?{{ page.querystring }}">{{ page }}</a></li>
{% else %}
<li><a href="?{{ page.querystring }}" class="page">{{ page }}</a></li>
{% endifequal %}
{% else %}
<li class="none"><a href="">...</a></li>
{% endif %}
{% endfor %}
{% if all_courses.has_next %}
<li class="long"><a href="?{{ all_courses.next_page_number.querystring }}">下一页</a></li>
{% endif %}
</ul>
</div>

8.3.排序

class CourseListView(View):
def get(self, request):
all_courses = Course.objects.all().order_by('-add_time')
# 热门课程推荐
hot_courses = Course.objects.all().order_by('-click_nums')[:3]
# 排序
sort = request.GET.get('sort', "")
if sort:
if sort == "students":
all_courses = all_courses.order_by("-students")
elif sort == "hot":
all_courses = all_courses.order_by("-click_nums")
# 分页
try:
page = request.GET.get('page', 1)
except PageNotAnInteger:
page = 1
p = Paginator(all_courses,2 , request=request)
courses = p.page(page)
return render(request, "course-list.html", {
"all_courses":courses,
'sort': sort,
'hot_courses':hot_courses, })
<div class="head">
<ul class="tab_header">
<li class="{% ifequal sort '' %}active{% endifequal %}"><a href="?sort=" >最新 </a></li>
<li class="{% ifequal sort 'hot' %}active{% endifequal %}"><a href="?sort=hot" >最热门 </a></li>
<li class="{% ifequal sort 'students' %}active{% endifequal %}"><a href="?sort=students" >参与人数 </a></li>
</ul>
</div>
<div class="head">热门课程推荐</div>
<div class="group_recommend">
{% for hot_course in hot_courses %}
<dl>
<dt>
<a target="_blank" href="">
<img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ hot_course.image }}"/>
</a>
</dt>
<dd>
<a target="_blank" href=""><h2> {{ hot_course.name }}</h2></a>
<span class="fl">难度:<i class="key">{{ hot_course.get_degree_display }}</i></span>
</dd>
</dl>
{% endfor %}
{#templates/course-list.html#}

{% extends 'base.html' %}
{% load staticfiles %}
{% block title %}公开课列表{% endblock %} {% block custom_bread %}
<section>
<div class="wp">
<ul class="crumbs">
<li><a href="index.html">首页</a>></li>
<li>公开课</li>
</ul>
</div>
</section>
{% endblock %}
{% block content %}
<section>
<div class="wp">
<div class="list" style="margin-top:0;">
<div class="left layout">
<div class="head">
<ul class="tab_header">
<li class="{% ifequal sort '' %}active{% endifequal %}"><a href="?sort=" >最新 </a></li>
<li class="{% ifequal sort 'hot' %}active{% endifequal %}"><a href="?sort=hot" >最热门 </a></li>
<li class="{% ifequal sort 'students' %}active{% endifequal %}"><a href="?sort=students" >参与人数 </a></li>
</ul>
</div>
<div id="inWindow">
<div class="tab_cont " id="content">
<div class="group_list">
{% for course in all_courses.object_list %}
<div class="box">
<a href="course-detail.html">
<img width="280" height="350" class="scrollLoading" src="{{ MEDIA_URL }}{{ course.image }}"/>
</a>
<div class="des">
<a href="course-detail.html">
<h2>{{ course.name }}</h2>
</a>
<span class="fl">时长:<i class="key">{{ course.learn_times }}</i></span>
<span class="fr">学习人数:{{ course.students }}&nbsp;&nbsp;</span>
</div>
<div class="bottom">
<a href="course-detail.html"><span class="fl">来自{{ course.course_org.name }}</span></a>
<span class="star fr notlogin
" data-favid="15">
{{ course.fav_nums }}
</span>
</div>
</div>
{% endfor %}
</div>
<div class="pageturn">
<ul class="pagelist">
{% if all_courses.has_previous %}
<li class="long"><a href="?{{ all_courses.previous_page_number.querystring }}">上一页</a></li>
{% endif %} {% for page in all_courses.pages %}
{% if page %}
{% ifequal page all_courses.number %}
<li class="active"><a href="?{{ page.querystring }}">{{ page }}</a></li>
{% else %}
<li><a href="?{{ page.querystring }}" class="page">{{ page }}</a></li>
{% endifequal %}
{% else %}
<li class="none"><a href="">...</a></li>
{% endif %}
{% endfor %}
{% if all_courses.has_next %}
<li class="long"><a href="?{{ all_courses.next_page_number.querystring }}">下一页</a></li>
{% endif %}
</ul>
</div>
</div>
</div>
</div>
<div class="right layout">
<div class="head">热门课程推荐</div>
<div class="group_recommend">
{% for hot_course in hot_courses %}
<dl>
<dt>
<a target="_blank" href="">
<img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ hot_course.image }}"/>
</a>
</dt>
<dd>
<a target="_blank" href=""><h2> {{ hot_course.name }}</h2></a>
<span class="fl">难度:<i class="key">{{ hot_course.get_degree_display }}</i></span>
</dd>
</dl>
{% endfor %} </div>
</div>
</div>
</div>
</section>
{% endblock %} course-list.html

course-list.html

# course/views.py

from django.shortcuts import render
from django.views.generic import View
from .models import Course
from pure_pagination import Paginator, EmptyPage, PageNotAnInteger class CourseListView(View):
def get(self, request):
all_courses = Course.objects.all().order_by('-add_time')
# 热门课程推荐
hot_courses = Course.objects.all().order_by('-click_nums')[:3]
# 排序
sort = request.GET.get('sort', "")
if sort:
if sort == "students":
all_courses = all_courses.order_by("-students")
elif sort == "hot":
all_courses = all_courses.order_by("-click_nums")
# 分页
try:
page = request.GET.get('page', 1)
except PageNotAnInteger:
page = 1
p = Paginator(all_courses,2 , request=request)
courses = p.page(page)
return render(request, "course-list.html", {
"all_courses":courses,
'sort': sort,
'hot_courses':hot_courses, })

views.py

8.4.课程详情

course-detail.html复制进来

(1)url配置

re_path('course/(?P<course_id>\d+)/', CourseDetailView.as_view(), name="course_detail"),
class CourseDetailView(View):
'''课程详情'''
def get(self, request, course_id):
return render(request, "course-detail.html", { })

在course-list.html中添加链接到详情

(2)views

class CourseDetailView(View):
'''课程详情'''
def get(self, request, course_id):
course = Course.objects.get(id=int(course_id))
# 课程的点击数加1
course.click_nums += 1
course.save()
return render(request, "course-detail.html", {
'course':course, })

(3)Course model增加

  • 一个category字段
  • 一个获取章节数的方法
  • 一个获取这么课程的学习用户方法

class Course(models.Model):
DEGREE_CHOICES = (
("cj", "初级"),
("zj", "中级"),
("gj", "高级")
)
name = models.CharField("课程名",max_length=50)
desc = models.CharField("课程描述",max_length=300)
detail = models.TextField("课程详情")
degree = models.CharField('难度',choices=DEGREE_CHOICES, max_length=2)
learn_times = models.IntegerField("学习时长(分钟数)",default=0)
students = models.IntegerField("学习人数",default=0)
fav_nums = models.IntegerField("收藏人数",default=0)
image = models.ImageField("封面图",upload_to="courses/%Y/%m",max_length=100)
click_nums = models.IntegerField("点击数",default=0)
add_time = models.DateTimeField("添加时间",default=datetime.now,)
course_org = models.ForeignKey(CourseOrg, on_delete=models.CASCADE, verbose_name="所属机构", null=True, blank=True)
category = models.CharField("课程类别",max_length=20, default="") class Meta:
verbose_name = "课程"
verbose_name_plural = verbose_name def get_zj_nums(self):
#获取课程的章节数
return self.lesson_set.all().count() def get_learn_users(self):
#获取这门课程的学习用户
return self.usercourse_set.all()[:5] def __str__(self):
return self.name

Course

(4)course-detail.html中课程详情信息显示

<div class="picbox">
<div class="tb-booth tb-pic">
<img width="440" height="445" src="{{ MEDIA_URL }}{{ course.image }}" class="jqzoom" />
</div> </div>
<div class="des">
<h1 title="{{ course.name }}">{{ course.name }}</h1>
<span class="key">{{ course.desc }}</span>
<div class="prize">
<span class="fl">难度:<i class="key">{{ course.get_degree_display }}</i></span>
<span class="fr">学习人数:{{ course.students }}</span>
</div>
<ul class="parameter">
<li><span class="pram word3">时&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;长:</span><span>{{ course.learn_times }}</span></li>
<li><span class="pram word3">章&nbsp;节&nbsp;数:</span><span>{{ course.get_zj_nums }}</span></li>
<li><span class="pram word3">课程类别:</span><span title="">{{ course.category }}</span></li>
<li class="piclist"><span class="pram word4">学习用户:</span>
{% for user_course in course.get_learn_users %}
<span class="pic"><img width="40" height="40" src="{{ MEDIA_URL }}{{ user_course.user.image }}"/></span>
{% endfor %}
</li>
</ul>
<div class="btns">

 显示课程详情

8.5.授课机构

(1)CourseOrg model添加一个获取教师数的方法

    def get_teacher_nums(self):
#获取机构的教师数
return self.teacher_set.all().count()
class CourseOrg(models.Model):
ORG_CHOICES = (
("pxjg", u"培训机构"),
("gx", u"高校"),
("gr", u"个人"),
)
name = models.CharField('机构名称',max_length=50)
desc = models.TextField('机构描述')
category = models.CharField(max_length=20, choices=ORG_CHOICES, verbose_name=u"机构类别", default="pxjg")
click_nums = models.IntegerField('点击数',default=0)
fav_nums = models.IntegerField('收藏数',default=0)
students = models.IntegerField("学习人数",default=0)
course_nums = models.IntegerField("课程数",default=0)
image = models.ImageField('logo',upload_to='org/%Y/%m',max_length=100)
address = models.CharField('机构地址',max_length=150,)
city = models.ForeignKey(CityDict,verbose_name='所在城市',on_delete=models.CASCADE)
add_time = models.DateTimeField(default=datetime.now) class Meta:
verbose_name = '课程机构'
verbose_name_plural = verbose_name def get_teacher_nums(self):
#获取机构的教师数
return self.teacher_set.all().count() def __str__(self):
return self.name

CourseOrg

(2)授课机构显示

<div class="head">
<h1>授课机构</h1>
<p>世界名校,课程权威</p>
</div>
<div class="pic">
<a href="/company/14/">
<img width="150" height="80" src="{{ MEDIA_URL }}{{ course.course_org.image }}"/>
</a>
</div>
<a href="/company/14/">
<h2 class="center" title="清华大学">{{ course.course_org.name }}</h2>
</a>
<div class="btn notlogin
"data-favid="14" id="jsRightBtn">
已收藏
</div>
<div class="clear">
<ul>
<li>
<span>课 &nbsp;程&nbsp; 数:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {{ course.course_org.course_nums }}</span>
</li>
<li>
<span>教 &nbsp;师&nbsp; 数:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {{ course.course_org.get_teacher_nums }}</span>
</li>
<li>所在地区:&nbsp;&nbsp;{{ course.course_org.address }}</li>
<li>认&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;证&nbsp;:
&nbsp;&nbsp;
<img title="金牌机构", src="{% static 'images/gold.png' %}"/>
</li>
</ul>
</div>
</div>

8.6.相关课程推荐

(1)给“Course” model添加一个“课程标签”字段

tag = models.CharField('课程标签',default='',max_length=10)
class Course(models.Model):
DEGREE_CHOICES = (
("cj", "初级"),
("zj", "中级"),
("gj", "高级")
)
name = models.CharField("课程名",max_length=50)
desc = models.CharField("课程描述",max_length=300)
detail = models.TextField("课程详情")
degree = models.CharField('难度',choices=DEGREE_CHOICES, max_length=2)
learn_times = models.IntegerField("学习时长(分钟数)",default=0)
students = models.IntegerField("学习人数",default=0)
fav_nums = models.IntegerField("收藏人数",default=0)
image = models.ImageField("封面图",upload_to="courses/%Y/%m",max_length=100)
click_nums = models.IntegerField("点击数",default=0)
tag = models.CharField('课程标签',default='',max_length=10)
add_time = models.DateTimeField("添加时间",default=datetime.now,)
course_org = models.ForeignKey(CourseOrg, on_delete=models.CASCADE, verbose_name="所属机构", null=True, blank=True)
category = models.CharField("课程类别",max_length=20, default="") class Meta:
verbose_name = "课程"
verbose_name_plural = verbose_name def get_zj_nums(self):
#获取课程的章节数
return self.lesson_set.all().count() def get_learn_users(self):
#获取这门课程的学习用户
return self.usercourse_set.all()[:5] def __str__(self):
return self.name

Course

(2)views

class CourseDetailView(View):
'''课程详情'''
def get(self, request, course_id):
course = Course.objects.get(id=int(course_id))
# 课程的点击数加1
course.click_nums += 1
course.save()
# 课程标签
# 通过当前标签,查找数据库中的课程
tag = course.tag
if tag:
# 需要从1开始不然会推荐自己
relate_courses = Course.objects.filter(tag=tag)[:3]
else:
relate_courses = []
return render(request, "course-detail.html", {
'course':course,
'relate_courses':relate_courses,
})

(3)前端

<div class="right layout">

                <div class="head">相关课程推荐</div>
<div class="group_recommend">
{% for relate_course in relate_courses %}
<dl>
<dt>
<a target="_blank" href="">
<img width="240" height="220" class="scrollLoading" src="{{ MEDIA_URL }}{{ relate_course.image }}"/>
</a>
</dt>
<dd>
<a target="_blank" href=""><h2> {{ relate_course.name }}</h2></a>
<span class="fl">学习时长:<i class="key">{{ relate_course.learn_times }}</i></span>
</dd>
</dl>
{% endfor %}
</div>
</div>

8.7.课程收藏和机构收藏

{% block custom_js %}{% endblock %},放到最下面的位置,因为是js代码,要最后加载

后端判断当前收藏转态

class CourseDetailView(View):
'''课程详情'''
def get(self, request, course_id):
course = Course.objects.get(id=int(course_id))
# 课程的点击数加1
course.click_nums += 1
course.save()
# 课程标签
# 通过当前标签,查找数据库中的课程
has_fav_course = False
has_fav_org = False # 必须是用户已登录我们才需要判断。
if request.user.is_authenticated:
if UserFavorite.objects.filter(user=request.user, fav_id=course.id, fav_type=1):
has_fav_course = True
if UserFavorite.objects.filter(user=request.user, fav_id=course.course_org.id, fav_type=2):
has_fav_org = True
tag = course.tag
if tag:
# 需要从1开始不然会推荐自己
relate_courses = Course.objects.filter(tag=tag)[:2]
else:
relate_courses = []
return render(request, "course-detail.html", {
'course':course,
'relate_courses':relate_courses,
"has_fav_course": has_fav_course,
"has_fav_org": has_fav_org,
})

course-detail.html中添加Ajax

{% block custom_js %}
<script type="text/javascript">
//收藏分享
function add_fav(current_elem, fav_id, fav_type){
$.ajax({
cache: false,
type: "POST",
url:"{% url "org:add_fav" %}",
data:{'fav_id':fav_id, 'fav_type':fav_type},
async: true,
beforeSend:function(xhr, settings){
xhr.setRequestHeader("X-CSRFToken", "{{ csrf_token }}");
},
success: function(data) {
if(data.status == 'fail'){
if(data.msg == '用户未登录'){
window.location.href="/login/";
}else{
alert(data.msg)
} }else if(data.status == 'success'){
current_elem.text(data.msg)
}
},
});
} $('#jsLeftBtn').on('click', function(){
add_fav($(this), {{ course.id }}, 1);
}); $('#jsRightBtn').on('click', function(){
add_fav($(this), {{ course.course_org.id }}, 2);
}); </script> {% endblock %}

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