Djang内置分页和自定义分页

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内置分页

views

from django.core.paginator import Paginator,Page,PageNotAnIntegerdef DJs_pages(request):
nid=request.GET.get('nid')
user_list=models.UserInfo.objects.all()
paginator=Paginator(user_list,2)
# .per_page: 每页显示条目数量
# .count: 数据总个数
# .num_pages:总页数
# .page_range:总页数的索引范围，如: (1,10),(1,200) 一次性显现有多少页显示多少个页码
# .page: page对象
if nid:
a=paginator.page(nid) #显示第x页 a相当于一个列表里面是一页的内容
else:
a=paginator.page(1) # has_next 是否有下一页
# next_page_number 下一页页码
# has_previous 是否有上一页
# previous_page_number 上一页页码
# object_list 分页之后的数据列表
# number 当前页
# paginator paginator对象
return render(request,'pages.html',{'a':a})

template

1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>Title</title>
6 </head>
7 <body>
8 <h1>用户列表</h1>
9 <ul>
10 {%for row in a %}
11 <li>{{row.nid}}==={{row.user}}==={{row.age}}===={{row.ug.title}}</li>
12 {%endfor%}
13
14 </ul>
15 <div>
16 {%if a.has_next %}
17 <a href="/pages/?nid={{a.next_page_number}}">下一页</a>
18 {%endif%}
19
20 </div>
21 <div>
22 {%for row in a.paginator.page_range %}
23 <a href="/pages/?nid={{row}}">{{row}}</a>
24 {%endfor%}
25
26 </div>
27 </body>
28 </html>

自定义分页

views

1 from creat_tool.paging import PageInfo
2
3 def custom_page(request):
4
5 all_num=models.UserInfo.objects.all().count()
6 #page_num=math.ceil(all_num/3)
7 pageinfo=PageInfo(request.GET.get('page'),1,all_num,2,'/custom/') #(current_page,每页几个数据，一共多少数据，显示几个页码，url)
8 #current_page=request.GET.get('page')
9 #每页显示多少数据
10 #current_page=int(current_page)
11 #per_page=3
12 #0-3 3-6 6-9
13 user_list = models.UserInfo.objects.all()[pageinfo.start():pageinfo.end()]#[起始位置：结束位置]
14 return render(request, 'custom.html', {'user_list': user_list,'pageinfo':pageinfo})

class

import math
class PageInfo():
def __init__(self,curret_page,per_page_ha_num,all_num,show_page,base_url):
try:
self.curret_page=int(curret_page) #1.将str数字转换为数字 2.不是数字的报错执行except
except Exception as e:
self.curret_page=1
self.per_page_ha_num=per_page_ha_num
self.all_num=all_num
self.all_page_num=math.ceil(self.all_num / self.per_page_ha_num)
self.show_page=int(show_page/2)
self.base_url=base_url
def start(self):
return (self.curret_page-1)*self.per_page_ha_num
def end(self):
return self.curret_page*self.per_page_ha_num def pagers(self):
star = self.curret_page - self.show_page end = self.curret_page + self.show_page if star <= 0:
star = 1
if end > self.all_page_num:
end = self.all_page_num page_list = []
if self.curret_page <= 1:
# prev = '<a href="">上一页</a>'
prev = '<li><a href="#" aria-label="Previous"><span aria-hidden="true">«</span>上一页</a></li>' else:
# prev = '<a href="%s?page=%s">上一页</a>' %(self.base_url,self.curret_page-1)
prev = '<li><a href="%s?page=%s" aria-label="Previous"><span aria-hidden="true">«</span>上一页</a></li>' % (
self.base_url, self.curret_page - 1) page_list.append(prev) # for i in range(1,self.all_page_num+1):
for i in range(star, end + 1):
if i == self.curret_page:
# temp='<a style="background-color:pink" href="%s?page=%s">%s</a>' %(self.base_url,i,i)
temp = ' <li class="active" ><a href="%s?page=%s">%s</a></li>' % (
self.base_url, i, i) # <li class="active" > 强调当前页
else:
temp = ' <li><a href="%s?page=%s">%s</a></li>' % (self.base_url, i, i)
# temp = '<a href="%s?page=%s">%s</a>' % (self.base_url,i, i)
page_list.append(temp) if self.curret_page >= self.all_page_num:
# prev = '<a href=""> 下一页</a>'
prev = '<li><a href="#" aria-label="Next"><span aria-hidden="true">«</span></a></li>'
prev = ' <li><a href="#" aria-label="Next"><span aria-hidden="true">»</span>下一页</a></li>'
else:
# prev = '<a href="%s?page=%s">下一页</a>' % (self.base_url,self.curret_page + 1)
prev = '<li><a href="%s?page=%s" aria-label="Next"><span aria-hidden="true">»</span>下一页</a></li>' % (
self.base_url, self.curret_page + 1)
page_list.append(prev)
return ''.join(page_list)

template

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="/static/bootstrap-3.4.1-dist/css/bootstrap.css"></head>
<body><h1>用户列表</h1>
<ul>
{%for row in user_list %}
<li>{{row.nid}}==={{row.user}}==={{row.age}}===={{row.ug.title}}</li>
{%endfor%} </ul>

<nav aria-label="Page navigation">
<ul class="pagination"> {{pageinfo.pagers|safe}} </ul>
</nav></body>
</html>