一、分页代码如下

from django.utils.safestring import mark_safeclass Page:    def __init__(self, current_page, data_count, per_page_count=10, pager_num=7):        self.current_page = current_page        self.data_count = data_count        self.per_page_count = per_page_count        self.pager_num = pager_num    @property    def start(self):        return (self.current_page - 1) * self.per_page_count    @property    def end(self):        return self.current_page * self.per_page_count    @property    def total_count(self):        v, y = divmod(self.data_count, self.per_page_count)        if y:            v += 1        return v    def page_str(self, base_url):        page_list = []        if self.total_count < self.pager_num:            start_index = 1            end_index = self.total_count + 1        else:            if self.current_page <= (self.pager_num + 1) / 2:                start_index = 1                end_index = self.pager_num + 1            else:                start_index = self.current_page - (self.pager_num - 1) / 2                end_index = self.current_page + (self.pager_num + 1) / 2                if (self.current_page + (self.pager_num - 1) / 2) > self.total_count:                    end_index = self.total_count + 1                    start_index = self.total_count - self.pager_num + 1        if self.current_page == 1:            prev = '上一页'        else:            prev = '上一页' % (base_url, self.current_page - 1,)        page_list.append(prev)        for i in range(int(start_index), int(end_index)):            if i == self.current_page:                temp = '%s' % (base_url, i, i)            else:                temp = '%s' % (base_url, i, i)            page_list.append(temp)        if self.current_page == self.total_count:            nex = '下一页'        else:            nex = '下一页' % (base_url, self.current_page + 1,)        page_list.append(nex)        jump = """        GO                """ % (base_url,)        page_list.append(jump)        page_str = mark_safe("".join(page_list))        return page_str

    
                  
      
               {% for item in li %}            {% include 'li.html' %}        {% endfor %}    
      
    
      
        
                   10            30            50            100            
      
    
      
               {
     { page_str }}    
      
            

/* li.html */ 
{
   { item }}

views.py文件

from  utils import paginationLIST = []for i in range(500):    LIST.append(i)def user_list(request):    current_page = request.GET.get('p', 1)    current_page = int(current_page)    val = request.COOKIES.get('per_page_count',10)    val = int(val)    page_obj = pagination.Page(current_page,len(LIST),val)    data = LIST[page_obj.start:page_obj.end]    page_str = page_obj.page_str("/user_list/")    return render(request, 'user_list.html', {
   'li': data,'page_str': page_str})

 二、cookie使用

Cookie 是由 Web 服务器保存在用户浏览器（客户端）上的小文本文件，它可以包含有关用户的信息;cookie的内容主要包括：名字，值，过期时间，路径和域。

1、获取Cookie：

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request.COOKIES[ 'key' ] request.get_signed_cookie(key, default = RAISE_ERROR, salt = '', max_age = None )      参数：          default: 默认值             salt: 加密盐          max_age: 后台控制过期时间

2、设置Cookie：

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rep  =  HttpResponse(...) 或 rep ＝ render(request, ...)   rep.set_cookie(key,value,...) rep.set_signed_cookie(key,value,salt = '加密盐' ,...)      参数：          key,              键          value = '',         值          max_age = None ,     超时时间          expires = None ,     超时时间(IE requires expires, so  set  it  if  hasn't been already.)          path = '/' ,         Cookie生效的路径， /  表示根路径，特殊的：跟路径的cookie可以被任何url的页面访问          domain = None ,      Cookie生效的域名          secure = False ,     https传输          httponly = False     只能http协议传输，无法被JavaScript获取（不是绝对，底层抓包可以获取到也可以被覆盖）

由于cookie保存在客户端的电脑上，所以，JavaScript和jquery也可以操作cookie。

1 2	<script src = '/static/js/jquery.cookie.js' >< / script> $.cookie( "list_pager_num" ,  30 ,{ path:  '/'  });

实例：

def auth(func):    '''    装饰登录判断是否存在cookie    '''    def inner(request, *args, **kwargs):        try:            #获取加盐cookie            v = request.get_signed_cookie('NID', salt='dwadwadwa')            if not v:                return redirect('/login/')        except Exception as e:            return redirect('/login/')        return func(request, *args, **kwargs)    return innerfrom django.utils.decorators import method_decoratorfrom django import viewsclass Order1(views.View):    """    方法一    CBV --> class Base view    """    @method_decorator(auth)    def get(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return res    @method_decorator(auth)    def post(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return resclass Order2(views.View):    """    方法二    CBV --> class Base view    """    @method_decorator(auth)    def dispatch(self, request, *args, **kwargs):        return super(Order2,self).dispatch(request,*args,**kwargs)    def get(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return res    def post(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return res@method_decorator(auth,name='dispatch')class Order3(views.View):    """    推荐使用:方法三    CBV --> class Base view    """    def get(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return res    def post(self,request):        redirect_to = settings.LOGIN_REDIRECT_URL        res = redirect(redirect_to)        res.set_signed_cookie('NID', 'user', salt="dwadwadwa")        return resdef login(request):    """    FBV --> func Base view    """    redirect_to = settings.LOGIN_REDIRECT_URL    if request.method == "GET":        return render(request, 'login.html')    if request.method == "POST":        user = request.POST.get('username')        passwd = request.POST.get('password')        obj = models.Usertype.objects.filter(username=user,password=passwd).first()        if obj:            res = redirect(redirect_to)            """            登录成功设置cookie            """            res.set_signed_cookie('NID', user, salt="dwadwadwa")            return res        else:            return render(request, 'login.html', {
    'password_is_wrong': True})

 

三、模块继承

模板中也有自己的语言，该语言可以实现数据展示

• • {
    { item }}
  • {% for item in item_list %}  <a>{
    { item }}</a>  {% endfor %}
    　　forloop.counter
    　　forloop.first
    　　forloop.last 
  • {% if ordered_warranty %}  {% else %} {% endif %}
  • 母板：{% block title %}{% endblock %}
    子板：{% extends "base.html" %}
    　　　{% block title %}{% endblock %}

实例:

    
              
              {% block css %} {% endblock %}    
      
       小男孩管理
      
    
      
        
       asdf        
       asdf        
       asdf        
       asdf        
       asdf    
      
    

{% extends 'master.html' %}{% block title %}用户管理{% endblock %}{% block content %}    
用户管理
    
      
               {% for i in u %}            
       
{
    { i }}
        {% endfor %}    
      
    {% for i in u %}        {% include 'tag.html' %}    {% endfor %}{% endblock %}{% block css %}    {% endblock %}{% block js %}    {% endblock %}