django分页四
2017-07-18 本文已影响0人
赖三石
在app01下新建utils包,之中创建pagination.py
# encoding=utf-8
__author__ = 'my'
class Page(object):
def __init__(self, current_page, data_count, per_page_count=8, view_page=11):
self.current_page = current_page
self.data_count = data_count
self.per_page_count = per_page_count
self.view_page = view_page
@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 page_num(self):
v, y = divmod(self.data_count, self.per_page_count)
#y为余数，y=0为假
if y:
v += 1
return v
def page_html_method(self):
#本来应该self.page_num()，但是有了@property修饰，可以self.page_num取得.
if self.page_num <= (self.view_page+1)/2:
start_index = 1
end_index = self.page_num + 1
else:
if self.current_page - (self.view_page-1)/2 <= 0:
start_index = 1
end_index = self.current_page + (self.view_page-1)/2 + 1
else:
if self.current_page + (self.view_page-1)/2 + 1 > self.page_num:
end_index = self.page_num + 1
start_index = self.page_num - self.view_page + 1
else:
start_index = self.current_page - (self.view_page-1)/2
end_index = self.current_page + (self.view_page-1)/2 + 1
page_html_list = []
if self.current_page == 1:
prev = '<a href="#">上一页</a>'
else:
prev = '<a href="/index/?p=%s">上一页</a>' % (self.current_page-1)
page_html_list.append(prev)
for j in range(start_index, end_index):
if self.current_page == j:
page_html = '<a class="active" href="/index/?p=%s">%s</a>' % (j, j)
else:
page_html = '<a href="/index/?p=%s">%s</a>' % (j, j)
page_html_list.append(page_html)
if self.current_page == self.page_num:
nex = '<a href="#">下一页</a>'
else:
nex = '<a href="/index/?p=%s">下一页</a>' % (self.current_page+1)
page_html_list.append(nex)
return page_html_list
views.py
# encoding=utf-8
from django.shortcuts import render
from app01.utils import pagination
def index(request):
#模拟数据,列表生成式
a_list = [i for i in range(1, 1003)]
current_page = request.GET.get('p', 1)
current_page = int(current_page)
data_count = len(a_list)
p = pagination.Page(current_page, data_count)
# data_count为数据总个数
data = a_list[p.start: p.end]
html = p.page_html_method()
return render(request, 'index.html', {'data': data, 'page': html})
template
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<style>
.active{
background-color: #1b6d85;
}
</style>
</head>
<body>
<ul>
{% for d in data %}
<li>{{ d }}</li>
{% endfor %}
</ul>
{% for i in page %}
{{ i|safe }}
{% endfor %}
</body>
</html>
