Model表创建，Url映射，Views函数处理，Html生成
根据上图，视频方向与视频分类是多对多的关系，视频分类与视频信息是一对多的关系，难度级别是单一的查询条件(与之前俩者并无关系)
Models.py如下：
from django.db import models class Direction(models.Model):
"""
方向：自动化，测试，运维，前端
"""
name = models.CharField(verbose_name='名称', max_length=32) classification = models.ManyToManyField('Classification') class Meta:
db_table = 'Direction'
verbose_name_plural = '方向（视频方向）' def __str__(self):
return self.name class Classification(models.Model):
"""
分类：Python Linux JavaScript OpenStack Node.js
"""
name = models.CharField(verbose_name='名称', max_length=32) class Meta:
db_table = 'Classification'
verbose_name_plural = '分类（视频分类）' def __str__(self):
return self.name class Level(models.Model):
title = models.CharField(max_length=32) class Meta:
verbose_name_plural = '难度级别' def __str__(self):
return self.title class Video(models.Model):
status_choice = (
(0, '下线'),
(1, '上线'),
) status = models.IntegerField(verbose_name='状态', choices=status_choice, default=1)
level = models.ForeignKey(Level)
classification = models.ForeignKey('Classification', null=True, blank=True) weight = models.IntegerField(verbose_name='权重（按从大到小排列）', default=0) title = models.CharField(verbose_name='标题', max_length=32)
summary = models.CharField(verbose_name='简介', max_length=32)
# img = models.ImageField(verbose_name='图片', upload_to='static/images/Video')
img = models.CharField(verbose_name='图片',max_length=32)
href = models.CharField(verbose_name='视频地址', max_length=256) create_date = models.DateTimeField(auto_now_add=True) class Meta:
db_table = 'Video'
verbose_name_plural = '视频' def __str__(self):
return self.title
Model表创建
Model表创建，Url映射，Views函数处理，Html生成
根据上图，视频方向与视频分类是多对多的关系，视频分类与视频信息是一对多的关系，难度级别是单一的查询条件(与之前俩者并无关系)
from django.shortcuts import render
from app01 import models
# Create your views here.
def video(request,*args,**kwargs):
condition={}
for k,v in kwargs.items():
condition[k]=int(v)
kwargs[k]=int(v)#重新以字典的方式赋值 class_list=models.Classification.objects.all()
level_list=models.Level.objects.all()
video_list=models.Video.objects.filter(**condition)#筛选的地方
return render(request,"video.html",{"class_list":class_list,
"level_list":level_list,
"kwargs":kwargs,
"video_list":video_list})
html页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.condition a{
border: solid 1px black;
padding: 5px 8px;
display: inline-block;
}
.condition a.active{
background-color: #dd77b4;
color: white;
}
</style>
</head>
<body>
<div class="condition">
<h2>筛选</h2> <div>
{% if kwargs_id == 0 %}
<a href="video-0-{{ kwargs.level_id }}.html" class="active">全部</a>
{% else %}
<a href="video-0-{{ kwargs.level_id }}.html">全部</a>
{% endif %}
{% for item in class_list %}
{% if item.id == kwargs.classification_id %}
<a href="video-{{ item.id }}-{{ kwargs.level_id }}.html" class="active">{{ item.name }}</a>
{% else %}
<a href="video-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
{% endif %}
{% endfor %}
</div>
<div>
{% if kwargs.level_id == 0 %}
<a href="video-{{ kwargs.classification_id }}-0.html" class="active">全部</a>
{% else %}
<a href="video-{{ kwargs.classification_id }}-0.html">全部</a>
{% endif %}
{% for item in level_list %}
{% if item.id == kwargs.level_id %}
<a class="active" href="video-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a>
{% else %}
<a href="video-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a>
{% endif %}
{% endfor %}
</div>
<h2>视屏</h2>
{% for item in video_list %}
<p>{{ item.title }}</p>
{% endfor %}
</div>
</body>
</html>
url
from django.conf.urls import url
from django.contrib import admin
from web_manage import views urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^video-(?P<classification_id>(\d+))-(?P<level_id>(\d+)).html$', views.video),
]
---------------------------------------------------------------------
多对多关系
如果指定了视频方向，视频分类简单分为俩种情况
- 视频分类选项为全部（全部对应ID为0）
- 视频分类没有的话则变更为全部
- 视频分类变更为没有的外键是则要先清零
def video2(request,*args,**kwargs):
condition = {} for k, v in kwargs.items():
temp = int(v)
kwargs[k] = temp
print(kwargs) # (?P<direction_id>(\d+))-(?P<classification_id>(\d+))-(?P<level_id>(\d+))
# 构造查询字典
direction_id = kwargs.get('direction_id')
classification_id = kwargs.get('classification_id')
level_id = kwargs.get('level_id') direction_list = models.Direction.objects.all() if direction_id == 0:
class_list = models.Classification.objects.all()
if classification_id == 0:
pass
else:
condition['classification_id'] = classification_id#把方向ID传进去
else:
direction_obj = models.Direction.objects.filter(id=direction_id).first()#取到一个方向
class_list = direction_obj.classification.all()#取到一个方向对应分类的对象 vlist = direction_obj.classification.all().values_list('id')#取到所有方向的ID的元组
if not vlist:#取到ID但没有值的时候
classification_id_list = []#拿到一个空列表
else:
classification_id_list = list(zip(*vlist))[0]#取到所有分类的ID列表 if classification_id == 0:
condition['classification_id__in'] = classification_id_list
else:
if classification_id in classification_id_list:
condition['classification_id'] = classification_id
else:
condition["classification_id"]=0
#################指定方向：[1,2,3] 分类：5
condition['classification_id__in'] = classification_id_list if level_id == 0:
pass
else:
condition['level_id'] = level_id level_list = models.Level.objects.all() video_list = models.Video.objects.filter(**condition) return render(
request,
'video2.html',
{
'direction_list':direction_list,
'class_list':class_list,
'level_list':level_list,
'video_list':video_list }
)
"""
如果：direction_id 0
*列出所有的分类
如果 classification_id = 0：
pass
else:
condition['classification_id'] = classification_id 否则：direction_id != 0
*列表当前方向下的所有分类
如果 classification_id = 0：
获取当前方向下的所有分类 [1,2,3,4]
condition['classification_id__in'] = [1,2,3,4]
else:
classification_id != 0
获取当前方向下的所有分类 [1,2,3,4]
classification_id 是否在 [1,2,3,4] :
condition['classification_id'] = classification_id
else:
condition['classification_id__in'] = [1,2,3,4] """html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
a{
border: solid 1px black;
padding: 5px 8px;
display: inline-block;
}
a.active{
background-color: #dd77b4;
color: white;
}
</style>
</head>
<body> <h2>筛选</h2>
<div>
{% if kwargs.direction_id == 0 %}
<a class="active" href="video2-0-0-{{ kwargs.level_id }}.html">全部</a>
{% else %}
<a href="video2-0-0-{{ kwargs.level_id }}.html">全部</a>
{% endif %}
{% for item in direction_list %}
{% if item.id == kwargs.direction_id %}
<a class="active" href="video2-{{ item.id }}-{{ kwargs.classification_id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
{% else %}
<a href="video2-{{ item.id }}-{{ kwargs.classification_id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
{% endif %}
{% endfor %}
</div> <div> {% if kwargs.classification_id == 0 %}
<a class="active" href="video2-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html">全部</a>
{% else %}
<a href="video2-{{ kwargs.direction_id }}-0-{{ kwargs.level_id }}.html">全部</a>
{% endif %}
{% for item in classification_list %}
{% if item.id == kwargs.classification_id %}
<a class="active" href="video2-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
{% else %}
<a href="video2-{{ kwargs.direction_id }}-{{ item.id }}-{{ kwargs.level_id }}.html">{{ item.name }}</a>
{% endif %}
{% endfor %} </div> <div>
{% if kwargs.level_id == 0 %}
<a class="active" href="video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html">全部</a>
{% else %}
<a href="video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-0.html">全部</a>
{% endif %}
{% for item in level_list %}
{% if item.id == kwargs.level_id %}
<a class="active" href="video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a>
{% else %}
<a href="video2-{{ kwargs.direction_id }}-{{ kwargs.classification_id }}-{{ item.id }}.html">{{ item.title }}</a>
{% endif %}
{% endfor %} </div>
<h2>视频</h2>
{% for video in video_list %}
<span>{{ video.title }}</span>
{% endfor %} </body>
</html>
瀑布流
views
from django.shortcuts import render,HttpResponse
from django.http import JsonResponse#相当于json
from app01 import models def imgs3(request):
return render(request,"imgs3.html") def get_imgs3(request):
result={"status":True,"data":None}
imgs_list=models.Imgs.objects.all().values("id","title","src")
result["data"]=list(imgs_list)#转成列表
return JsonResponse(result)
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
#img3{
width: 1000px;
margin: 0 auto;
}
#img3 div{
width: 25%;
float: left;
}
#img3 img{
width: 100%;
}
</style>
</head>
<body> <div id="img3">
<div></div>
<div></div>
<div></div>
<div></div>
</div>
</body>
</html> <script src="/static/js/jquery-3.1.1.js"></script>
<script>
$(function () {
var obj=new Tcrollimg();//定义一个类
obj.imgs();
obj.scrollEvent();
}); function Tcrollimg() {
this.num=0;
this.laststate=3;//加一个属性
this.imgs=function () {
var that=this;
$.ajax({
url:"/get_imgs3.html",
type:"GET",
data:{"num":that.num},
dataType:"JSON",
success:function (arg) {
var img_list=arg.data;
$(arg.data).each(function (index,v) {//index是索引，v是值
var tag=document.createElement("img");
tag.src=v.src;
var tag2=document.createElement("span");
tag2.innerText=v.title;
var eqv=(index+that.laststate+1)%4;//加 1 是指下次从插图片的时候从上一个位置插入
$("#img3").children().eq(eqv).append(tag,tag2);
if(index+1==img_list.length){}//索引加一等于数据的长度
that.laststate=eqv//当全部加载完之后赋值给eqv })
} })
}; this.scrollEvent=function () {
var that=this;
$(window).scroll(function () {//监听滚动事件
var scrollTop=$(window).scrollTop();//滚轮的高度
var winHight=$(window).height();//屏幕的高度
var docHight=$(document).height();//html的高度，也就是body的高度
if(scrollTop+winHight==docHight){//当滚轮到底的时候触发
that.imgs()//执行下一个函数
}
})
} } </script>