Django分页器（类实现）
安装tree：yum install tree
使用tree：最简单的使用办法是直接输入tree命令，就会自动给我们以树形的形式列出当前目录的文件和文件夹，不加任何参数，它会自动列表当前目录下面所有深度级别的文件和目录。
只查看当前第一级的目录和文件："tree -L 1 "；
只查看当前第二级的目录和文件："tree -L 2 "；
只查看当前第N级的目录和文件："tree -L N "；
保存目录结构信息：tree -L 2 > /home/xyh/tree.txt；
Pagination(类实现)
目录结构
具体实现代码
-----------------------models.py-----------------------
from django.db import models
class UserInfo(models.Model):
name = models.CharField(max_length=32)
pwd = models.CharField(max_length=32)
----------------tools之pagination.py----------------
#! /usr/bin/env python
# -*- coding: utf-8 -*-
# __author__ = "kaylee"
# Date: 2017/9/20
'''
使用方法示例：
from app01.tools.pagination import Pagination
def user(request):
user_list=models.UserInfo.objects.all()
total_record_count=user_list.count()
current_page_num=int(request.GET.get("page",1))
base_url='/users.html/'
page_obj = Pagination(user_list,total_record_count, current_page_num,base_url)
per_page_records=page_obj.show_records
total_page_html=page_obj.total_page_html
return render(request,"user.html",{"per_page_records":per_page_records,
"total_page_html":total_page_html})
'''
from django.utils.safestring import mark_safe
class Pagination:
def __init__(self, obj,total_record_count, current_page_num,base_url,
page_count=11, per_records_num=15):
'''
:param obj: Queryset，所有用户对象的集合
:param total_record_count: 用户表的总记录条数
:param current_page_num: 当前页码
:param base_url: 要应用的URL
:param page_count: 指定显示页码个数
:param per_records_num: 每页记录条数
'''
self.obj=obj
self.total_record_count = total_record_count
self.current_page_num = current_page_num
self.base_url=base_url
self.per_records_num = per_records_num
max_page_num, b = divmod(total_record_count, per_records_num)
if b:
max_page_num = max_page_num + 1
self.max_page_num = max_page_num
self.page_count = page_count
half_page_count = int(page_count / 2)
self.half_page_count = half_page_count
def start(self):
'''
起始页码
:return:
'''
if self.current_page_num <= self.half_page_count + 1:
return 1
elif self.current_page_num >= self.max_page_num - self.half_page_count:
return self.max_page_num - self.half_page_count * 2
else:
return self.current_page_num - self.half_page_count
def stop(self):
'''
结束页码
:return:
'''
if self.current_page_num <= self.half_page_count + 1:
return self.page_count + 1
elif self.current_page_num >= self.max_page_num - self.half_page_count:
return self.max_page_num + 1
else:
return self.current_page_num + self.half_page_count + 1
@property
def show_records(self):
'''
当前页码的所有记录，一个个对象
:return:
'''
record_start = (self.current_page_num - 1) * self.per_records_num
record_stop = self.current_page_num * self.per_records_num
per_page_records=self.obj[record_start:record_stop]
return per_page_records
@property
def total_page_html(self):
'''
页码显示
:return:
'''
page_num_list = []
# 如果当前是第一页，上一页禁止点击，上一页跳转页码为1
if self.current_page_num == 1:
prev_page_html = '<li class="disabled"><a href="%s?page=1">上一页</a></li>'%self.base_url
else:
prev_page_html = '<li><a href="%s?page=%s">上一页</a></li>' % (self.base_url,self.current_page_num - 1) page_num_list.append(prev_page_html) for page_num in range(self.start(), self.stop()): if page_num == self.current_page_num: page_html = '<li class="active"><a href="%s?page=%s">%s</a></li>' % (self.base_url,page_num, page_num) else: page_html = '<li><a href="%s?page=%s">%s</a></li>' % (self.base_url,page_num, page_num) page_num_list.append(page_html) if self.current_page_num == self.max_page_num: next_page_html = '<li class="disabled"><a href="%s?page=%s">下一页</a></li>' % (self.base_url,self.max_page_num) else: next_page_html = '<li><a href="%s?page=%s">下一页</a></li>' % (self.base_url,self.current_page_num + 1) page_num_list.append(next_page_html) return mark_safe(''.join(page_num_list))
---------------------views.py---------------------
from django.shortcuts import render
from app01 import models
from app01.tools.pagination import Pagination
def user(request):
'''
创建表记录
# for i in range(1,302):
# models.UserInfo.objects.create(name='kaylee%s'%i,pwd='123%s'%i)
:param request:
:return:
'''
user_list=models.UserInfo.objects.all()
total_record_count=user_list.count()
current_page_num=int(request.GET.get("page",1))
base_url='/users.html/'
page_obj = Pagination(user_list,total_record_count, current_page_num,base_url)
per_page_records=page_obj.show_records
total_page_html=page_obj.total_page_html
return render(request,"user.html",{"per_page_records":per_page_records,
"total_page_html":total_page_html})
--------------------settings.py--------------------
#设置
STATIC_URL = '/static/'
STATICFILES_DIRS = (
os.path.join(BASE_DIR,'app01/static') ,
)
-----------------urls.py-----------------
from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^users.html',views.user),
]
------------------------templates之user.html------------------------
{% load staticfiles %}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Title</title>
<link rel="stylesheet" type="text/css" href="{% static 'bootstrap/css/bootstrap.css' %}">
</head>
<body>
<div class="container">
<div class="row">
<table class="table table-bordered table-hover">
<thead>
<tr>
<th>ID</th>
<th>用户名</th>
<th>密码</th>
</tr>
</thead>
<tbody>
{% for record in per_page_records %}
<tr>
<td>{{ record.id }}</td>
<td>{{ record.name }}</td>
<td>{{ record.pwd }}</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
<ul class="pagination">
{{ total_page_html }}
</ul>
</div>
</body>
</html>
效果图
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