class PageInfo(object):
def __init__(self,current_page,all_count,per_page,show_page=11):
try: #如果用户传入的页码异常 就让页码=1
self.current_page=int(current_page)
except Exception:
self.current_page = 1
self.show_page=show_page
self.per_page=per_page
a,b=divmod(all_count,per_page) #计算显示数据库一共需要 多少总页码
if b:
a=a+1
self.all_page=a
def start(self):
return (self.current_page-1)* self.per_page
def stop(self):
return self.current_page*self.per_page
def pager(self): #该方法专门用于 在前端显示页码
half=int((self.show_page-1)/2)
#如数据库 数据条目 小于 11条
if self.all_page < self.show_page:
begin=1
stop=self.all_page+1
else:
#如果当前页小于=5 起始页再减去5就是负数了那么 就 显示0-11页码
if self.current_page<=half:
begin =1
stop=self.show_page+1
else:
begin=self.current_page-half
stop=self.current_page+half+1
page_list = []
if self.current_page<=1: #如果当前页是1了就不要在上一页了
b = ‘<a href="/custom.html?page=#">上一页</a>‘
else:
b=‘<a href="/custom.html?page=%s">上一页</a>‘%(self.current_page-1)
page_list.append(b)
for i in range(begin,stop):
if i ==self.current_page:
temp=‘<a style="display: inline-block;padding: 5px;margin: 5px;background-color: bisque" href="/custom.html?page=%s">%s</a>‘%(i,i)
else:
temp = ‘<a style="display: inline-block;padding: 5px;margin: 5px;background-color:blueviolet" href="/custom.html?page=%s">%s</a>‘% (i,i)
page_list.append(temp)
return ‘‘.join(page_list)
def custom(request):
all_count=models.UserInfo.objects.all().count()#计算一共 数据库中一共多少条数据
user_info=PageInfo(request.GET.get(‘page‘),all_count,10)
user_list=models.UserInfo.objects.all()[user_info.start():user_info.stop()]
return render(request,‘custom.html‘,{‘user_list‘:user_list,‘page_info‘:user_info})
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<ul>
{% for row in user_list %}
<li>{{ row.name }}</li>
{% endfor %}
</ul>
{{ page_info.pager|safe}}
{# 把Python的对象传入模板，自动执行,|safe 显示#}
</body>
</html>
时间： 2024-12-11 00:55:52