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Zhang_derek

Django+xadmin打造在线教育平台(五)

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">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;长:</span><span>{{ course.learn_times }}</span></li>
                            <li><span class="pram word3">&nbsp;&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>&nbsp;&nbsp; 数:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   {{ course.course_org.course_nums }}</span>
                            </li>
                            <li>
                                <span>&nbsp;&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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&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 %}

 

posted on 2018-03-25 21:03  zhang_derek  阅读(...)  评论(... 编辑 收藏

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