Django中ListView分页技术
分页技术在Web开发中应用非常频繁。常见的WEB中都是用javascript去控制的，而Django中分页非常方便，通过Pagination你可以很方便达到分页效果。今天主要说的是共同视图中ListView的分页处理，本质还是依赖与Pagination。
数据模型：models.py
from django.db import models
from django.contrib.auth.models import User
# Create your models here.
class Msg(models.Model):
title = models.CharField(max_length = 30)
content = models.TextField()
user = models.ForeignKey(User)
ip = models.IPAddressField()
datetime = models.DateTimeField(auto_now_add = True)
click_count = models.IntegerField(default = 0)
def __unicode__(self):
return self.title
构造视图：views.py
from django.views.generic import ListView
from msg_board.models import Msg
ITEMS_PER_PAGE = 3
class MsgList(ListView):
model = Msg#数据模型
context_object_name = 'msg_list'#模板中变量
template_name = 'index.html'#模板文件
paginate_by = ITEMS_PER_PAGE#一个页面显示的条目
URL映射：
工程\App\urls.py
from django.conf.urls import patterns, include, url
from msg_board.views import MsgList
urlpatterns = patterns('',
# Examples:
url(r'^$',MsgList.as_view(), name = 'index'),
)
工程\urls.py
from django.conf.urls import patterns, include, url
# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
# Examples:
# url(r'^$', 'mysite.views.home', name='home'),
# url(r'^mysite/', include('mysite.mysite.urls')),
# Uncomment the admin/doc line below to enable admin documentation:
url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
# Uncomment the next line to enable the admin:
url(r'^admin/', include(admin.site.urls)),
#host page
url(r'^mysite/',include('msg_board.urls', namespace = 'msg_board')),
)
模板文件：index.html
<html>
<head><title>msg_board</title>
<style type="text/css">
table{border:3 solid black; border-collapse:collapse}
table th, table td{border:2 solid black}
</style>
</head>
<body>
<h3>Message:</h3>
{% if msg_list %}
<table id = "msgs">
<tr>
<th>Title</th>
<th>Content</th>
<th>Author</th>
<th>Ip</th>
<th>Time</th>
<th>Click</th>
</tr>
{%for msg in msg_list %}
<tr>
<td>{{msg.title}}</td>
<td>{{msg.content}}</td>
<td>{{msg.user}}</td>
<td>{{msg.ip}}</td>
<td>{{msg.datetime}}</td>
<td>{{msg.click_count}}</td>
</tr>
{% endfor%}
</table>
{% if is_paginated %}
<div class="pagination">
<span class="page-links">
{% if page_obj.has_previous %}
<a href="/mysite?page={{ page_obj.previous_page_number }}">上一页</a>
{% endif %}
{% if page_obj.has_next %}
<a href="/mysite?page={{ page_obj.next_page_number }}">下一页</a>
{% endif %}
<span class="page-current">
第{{ page_obj.number }}页 ，工{{ page_obj.paginator.num_pages }}页。
</span>
</span>
</div>
{%endif%}
{% else %}
<p>No msgs !!!</p>
{% endif %}
</body>
</html>
效果图：
