Django框架 Pagination分页实现代码实例
一、自定义分页
1、基础版自定义分页
data = []
for i in range(1, 302):
tmp = {"id": i, "name": "alex-{}".format(i)}
data.append(tmp)
print(data)
def user_list(request):
# user_list = data[0:10]
# user_list = data[10:20]
try:
current_page = int(request.GET.get("page"))
except Exception as e:
current_page = 1
per_page = 10
# 数据总条数
total_count = len(data)
# 总页码
total_page, more = divmod(total_count, per_page)
if more:
total_page += 1
# 页面最多显示多少个页码
max_show = 11
half_show = int((max_show-1)/2)
if current_page <= half_show:
show_start = 1
show_end = max_show
else:
if current_page + half_show >= total_page:
show_start = total_page - max_show
show_end = total_page
else:
show_start = current_page - half_show
show_end = current_page + half_show
# 数据库中获取数据
data_start = (current_page - 1) * per_page
data_end = current_page * per_page
user_list = data[data_start:data_end]
# 生成页面上显示的页码
page_html_list = []
# 加首页
first_li = '<li><a href="/user_list/?page=1" rel="external nofollow" >首页</a></li>'
page_html_list.append(first_li)
# 加上一页
if current_page == 1:
prev_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'
else:
prev_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'.format(current_page - 1)
page_html_list.append(prev_li)
for i in range(show_start, show_end+1):
if i == current_page:
li_tag = '<li class="active"><a href="/user_list/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)
else:
li_tag = '<li><a href="/user_list/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)
page_html_list.append(li_tag)
# 加下一页
if current_page == total_page:
next_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'
else:
next_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'.format(current_page+1)
page_html_list.append(next_li)
# 加尾页
page_end_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>'.format(total_page)
page_html_list.append(page_end_li)
page_html = "".join(page_html_list)
return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})
2、封装保存版
class Pagination(object):
def __init__(self, current_page, total_count, base_url, per_page=10, max_show=11):
"""
:param current_page: 当前页
:param total_count: 数据库中数据总数
:param per_page: 每页显示多少条数据
:param max_show: 最多显示多少页
"""
try:
current_page = int(current_page)
except Exception as e:
current_page = 1
self.current_page = current_page
self.total_count = total_count
self.base_url = base_url
self.per_page = per_page
self.max_show = max_show
# 总页码
total_page, more = divmod(total_count, per_page)
if more:
total_page += 1
half_show = int((max_show - 1) / 2)
self.half_show = half_show
self.total_page = total_page
@property
def start(self):
return (self.current_page - 1) * self.per_page
@property
def end(self):
return self.current_page * self.per_page
def page_html(self):
if self.current_page <= self.half_show:
show_start = 1
show_end = self.max_show
else:
if self.current_page + self.half_show >= self.total_page:
show_start = self.total_page - self.max_show
show_end = self.total_page
else:
show_start = self.current_page - self.half_show
show_end = self.current_page + self.half_show
# 生成页面上显示的页码
page_html_list = []
# 加首页
first_li = '<li><a href="{}?page=1" rel="external nofollow" >首页</a></li>'.format(self.base_url)
page_html_list.append(first_li)
# 加上一页
if self.current_page == 1:
prev_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'
else:
prev_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'.format(self.base_url, self.current_page - 1)
page_html_list.append(prev_li)
for i in range(show_start, show_end + 1):
if i == self.current_page:
li_tag = '<li class="active"><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{1}</a></li>'.format(self.base_url, i)
else:
li_tag = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{1}</a></li>'.format(self.base_url, i)
page_html_list.append(li_tag)
# 加下一页
if self.current_page == self.total_page:
next_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'
else:
next_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'.format(self.base_url, self.current_page + 1)
page_html_list.append(next_li)
# 加尾页
page_end_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>'.format(self.base_url, self.total_page)
page_html_list.append(page_end_li)
return "".join(page_html_list)
3、封装保存版使用指南
def user_list(request):
pager = Pagination(request.GET.get("page"), len(data), request.path_info)
user_list = data[pager.start:pager.end]
page_html = pager.page_html()
return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})
二、Django内置分页
1、内置分页view部分
from django.shortcuts import render
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
L = []
for i in range(999):
L.append(i)
def index(request):
current_page = request.GET.get('p')
paginator = Paginator(L, 10)
# 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)
# page: page对象
try:
posts = paginator.page(current_page)
# 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
except PageNotAnInteger:
posts = paginator.page(1)
except EmptyPage:
posts = paginator.page(paginator.num_pages)
return render(request, 'index.html', {'posts': posts})
2、内置分页HTML部分
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<ul>
{% for item in posts %}
<li>{{ item }}</li>
{% endfor %}
</ul>
<div class="pagination">
<span class="step-links">
{% if posts.has_previous %}
<a href="?p={{ posts.previous_page_number }}" rel="external nofollow" >Previous</a>
{% endif %}
<span class="current">
Page {{ posts.number }} of {{ posts.paginator.num_pages }}.
</span>
{% if posts.has_next %}
<a href="?p={{ posts.next_page_number }}" rel="external nofollow" >Next</a>
{% endif %}
</span>
</div>
</body>
</html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持【听图阁-专注于Python设计】。
