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

Message:
{% if msg_list %}
    
    {%for msg in msg_list %}
        
    {% endfor%}
    

        

            
Title
            
Content
            
Author
            
Ip
            
Time
            
Click
        

            
{{msg.title}}
            
{{msg.content}}
            
{{msg.user}}
            
{{msg.ip}}
            
{{msg.datetime}}
            
{{msg.click_count}}
        
    {% if is_paginated %}
    

        
            {% if page_obj.has_previous %}
                上一页
            {% endif %}
            {% if page_obj.has_next %}
                下一页
            {% endif %}
            
                第{{ page_obj.number }}页 ，工{{ page_obj.paginator.num_pages }}页。
            
        
    
    {%endif%}
{% else %}
No msgs !!!
{% endif %}

效果图：