1、定义分页类
class Pagination(object):
\'\'\'
分页类
参数：
per_page：每页数量
total_data：总数目
cur_page：当前页。
用法：(flask，html中自定义css)
py:
page = int(request.args.get("page",1)) #获取args参数\'page\'
per_page = 50 #每页的数量
dsubAll = query_db("SELECT COUNT(id) AS C FROM dsub",one=True)["C"] #总数目
pages = Pagination(cur_page=page,per_page=per_page,total_data=dsubAll) #分页类
dsub = query_db("SELECT * FROM dsub LIMIT ?,?",(pages.offset,pages.limit)) #取offset与limit进行分页
html:
<div>{{ pages.get_html() | safe }}</div>
\'\'\'
def __init__(self,per_page=20,total_data=20,cur_page=1):
import math
self.size = per_page
self.data_count = total_data
self.page_current = int(cur_page)
self.page_max = int(math.ceil(self.data_count * 0.1 * 10 / self.size ))
self.page_current = 1 if self.page_current < 1 else self.page_current
self.page_current = self.page_max if self.page_current > self.page_max else self.page_current
self.offset = ( self.page_current - 1) * self.size
self.limit = self.size
#判断url中是否有其他参数，以及是否已有page参数
_fullpath = web.ctx.fullpath
if "?" in _fullpath:
if "page" in _fullpath:
self.url = _fullpath.split("page")[0]
else:
self.url = "{}&".format(_fullpath)
else:
self.url = "{}?".format(_fullpath)
def get_html(self):
self.page_pre = self.page_current - 1
self.page_next = self.page_current + 1
if self.page_max in (0,1) :
html = \'\'\'
<ul>
<li><a>首页</a></li>
<li><a>上一页</a></li>
<li><a>下一页</a></li>
<li><a>尾页</a></li>
</ul>
\'\'\'
elif self.page_current <= 1:
html = \'\'\'
<ul>
<li><a>首页</a></li>
<li><a>上一页</a></li>
<li><a href="{self.url}page={self.page_next}">下一页</a></li>
<li><a href="{self.url}page={self.page_max}">尾页</a></li>
</ul>
\'\'\'.format(self=self)
elif self.page_current >= self.page_max:
html = \'\'\'
<ul>
<li><a href="{self.url}page=1">首页</a></li>
<li><a href="{self.url}page={self.page_pre}">上一页</a></li>
<li><a>下一页</a></li>
<li><a>尾页</a></li>
</ul>
\'\'\'.format(self=self)
else:
html = \'\'\'
<ul>
<li><a href="{self.url}page=1">首页</a></li>
<li><a href="{self.url}page={self.page_pre}">上一页</a></li>
<li><a href="{self.url}page={self.page_next}">下一页</a></li>
<li><a href="{self.url}page={self.page_max}">尾页</a></li>
</ul>
\'\'\'.format(self=self)
banner = \'\'\'
<ul>
<li>
<a>第 <code>{self.page_current}</code> 页</a>
</li>
<li>
<a>共 <code>{self.page_max}</code> 页</a>
</li>
</ul>
\'\'\'.format(self=self)
html = \'<div class="pagination">{}</div>\'.format(html + banner)
if self.data_count > self.size:
return html
else:
return ""
2、用法
i = web.input()
page = i.get("page",1)
pageSize = 20
notifyAll = len(list(db.select("team_notify",where="status=\'doing\'")))
notifyPage = conf.Pagination(pageSize,notifyAll,page)
notifies = db.select("team_notify",where="status=\'doing\'",order="expressTime DESC",limit=pageSize,offset=notifyPage.offset)
3、效果
