一、分页代码如下
from django.utils.safestring import mark_safe
class 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 = ‘<a class="page" href="javascript:void(0);">上一页</a>‘
else:
prev = ‘<a class="page" href="%s?p=%s">上一页</a>‘ % (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 = ‘<a class="page active" href="%s?p=%s">%s</a>‘ % (base_url, i, i)
else:
temp = ‘<a class="page" href="%s?p=%s">%s</a>‘ % (base_url, i, i)
page_list.append(temp)
if self.current_page == self.total_count:
nex = ‘<a class="page" href="javascript:void(0);">下一页</a>‘
else:
nex = ‘<a class="page" href="%s?p=%s">下一页</a>‘ % (base_url, self.current_page + 1,)
page_list.append(nex)
jump = """
<input type=‘text‘ /><a onclick=‘jumpTo(this, "%s?p=");‘>GO</a>
<script>
function jumpTo(ths,base){
var val = ths.previousSibling.value;
location.href = base + val;
}
</script>
""" % (base_url,)
page_list.append(jump)
page_str = mark_safe("".join(page_list))
return page_str
django分页后台代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
.pagination .page{
display: inline-block;
padding: 5px;
background-color: cyan;
margin: 5px;
}
.pagination .page.active{
background-color: brown;
color: white;
}
</style>
</head>
<body>
<ul>
{% for item in li %}
{% include ‘li.html‘ %}
{% endfor %}
</ul>
<div>
<select id="ps" onchange="changePageSize(this)">
<option value="10">10</option>
<option value="30">30</option>
<option value="50">50</option>
<option value="100">100</option>
</select>
</div>
<div class="pagination">
{{ page_str }}
</div>
<script src="/static/jquery-1.12.4.js"></script>
<script src="/static/jquery.cookie.js"></script>
<script>
$(function(){
var v = $.cookie(‘per_page_count‘, {‘path‘: "/user_list/`"});
$(‘#ps‘).val(v);
});
function changePageSize(ths){
var v = $(ths).val();
console.log(v);
$.cookie(‘per_page_count‘,v, {‘path‘: "/user_list/"});
location.reload();
}
</script>
</body>
</html>
user_list.html
/* li.html */<li>{{ item }}</li>
views.py文件
from utils import pagination
LIST = []
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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2、设置Cookie：
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由于cookie保存在客户端的电脑上，所以，JavaScript和jquery也可以操作cookie。
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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 inner
from django.utils.decorators import method_decorator
from django import views
class 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 res
class 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 res
def 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})
django cookie FBV&CBV使用方法
时间： 2024-11-03 01:37:31