使用Django Component 系列2 ：翻页组件

Django翻页组件：

1. Django自带Paginator：https://docs.djangoproject.com/en/1.4/topics/pagination/

2. Django Endless Pagination：http://django-endless-pagination.readthedocs.org/en/latest/index.html#

安装：easy_install -Z django-endless-pagination 或 pip install django-endless-pagination

3. Django-Pagination：http://pypi.python.org/pypi/django-pagination#downloads

安装：pip install django-pagination

参考资料：

http://obroll.com/example-how-to-use-django-pagination-in-django-1-3/

/article/3860785.html

/article/1892238.html

以下代码演示Django Endless Pagination和Django-Pagination的用法。

settings.py

# Django settings for Paginator project.
import os.path

DEBUG = True
TEMPLATE_DEBUG = DEBUG

ADMINS = (
# ('Your Name', 'your_email@example.com'),
)

MANAGERS = ADMINS

DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
'NAME': 'todo',                      # Or path to database file if using sqlite3.
'USER': 'user',                      # Not used with sqlite3.
'PASSWORD': 'password',                  # Not used with sqlite3.
'HOST': 'localhost',                      # Set to empty string for localhost. Not used with sqlite3.
'PORT': '3306',                      # Set to empty string for default. Not used with sqlite3.
}
}

# Local time zone for this installation. Choices can be found here:
# http://en.wikipedia.org/wiki/List_of_tz_zones_by_name # although not all choices may be available on all operating systems.
# On Unix systems, a value of None will cause Django to use the same
# timezone as the operating system.
# If running in a Windows environment this must be set to the same as your
# system time zone.
TIME_ZONE = 'America/Chicago'

# Language code for this installation. All choices can be found here:
# http://www.i18nguy.com/unicode/language-identifiers.html LANGUAGE_CODE = 'en-us'

SITE_ID = 1

# If you set this to False, Django will make some optimizations so as not
# to load the internationalization machinery.
USE_I18N = True

# If you set this to False, Django will not format dates, numbers and
# calendars according to the current locale.
USE_L10N = True

# If you set this to False, Django will not use timezone-aware datetimes.
USE_TZ = True

# Absolute filesystem path to the directory that will hold user-uploaded files.
# Example: "/home/media/media.lawrence.com/media/"
MEDIA_ROOT = ''

# URL that handles the media served from MEDIA_ROOT. Make sure to use a
# trailing slash.
# Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
MEDIA_URL = ''

# Absolute path to the directory static files should be collected to.
# Don't put anything in this directory yourself; store your static files
# in apps' "static/" subdirectories and in STATICFILES_DIRS.
# Example: "/home/media/media.lawrence.com/static/"
STATIC_ROOT = ''

# URL prefix for static files.
# Example: "http://media.lawrence.com/static/"
STATIC_URL = '/static/'

# Additional locations of static files
STATICFILES_DIRS = (
# Put strings here, like "/home/html/static" or "C:/www/django/static".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.
)

# List of finder classes that know how to find static files in
# various locations.
STATICFILES_FINDERS = (
'django.contrib.staticfiles.finders.FileSystemFinder',
'django.contrib.staticfiles.finders.AppDirectoriesFinder',
#    'django.contrib.staticfiles.finders.DefaultStorageFinder',
)

# Make this unique, and don't share it with anybody.
SECRET_KEY = 'bm7h+2u)#-zr+ddg6$a97rev#)o@*gr$d6bw(j&k_rueo23rbo'

# List of callables that know how to import templates from various sources.
TEMPLATE_LOADERS = (
'django.template.loaders.filesystem.Loader',
'django.template.loaders.app_directories.Loader',
#     'django.template.loaders.eggs.Loader',
)

MIDDLEWARE_CLASSES = (
'django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
# Uncomment the next line for simple clickjacking protection:
# 'django.middleware.clickjacking.XFrameOptionsMiddleware',

'pagination.middleware.PaginationMiddleware',
)

ROOT_URLCONF = 'Paginator.urls'

# Python dotted path to the WSGI application used by Django's runserver.
WSGI_APPLICATION = 'Paginator.wsgi.application'

TEMPLATE_DIRS = (
# Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
# Always use forward slashes, even on Windows.
# Don't forget to use absolute paths, not relative paths.

os.path.join(os.path.dirname(__file__), 'templates').replace('\\','/'),
)

TEMPLATE_CONTEXT_PROCESSORS = (
"django.contrib.auth.context_processors.auth",
"django.core.context_processors.debug",
"django.core.context_processors.i18n",
"django.core.context_processors.media",
"django.core.context_processors.static",
"django.contrib.messages.context_processors.messages",
"django.core.context_processors.request",
)

INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
# Uncomment the next line to enable the admin:
# 'django.contrib.admin',
# Uncomment the next line to enable admin documentation:
# 'django.contrib.admindocs',

'todo',
'pagination',
'endless_pagination',
)

# A sample logging configuration. The only tangible logging
# performed by this configuration is to send an email to
# the site admins on every HTTP 500 error when DEBUG=False.
# See http://docs.djangoproject.com/en/dev/topics/logging for
# more details on how to customize your logging configuration.
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'filters': {
'require_debug_false': {
'()': 'django.utils.log.RequireDebugFalse'
}
},
'handlers': {
'mail_admins': {
'level': 'ERROR',
'filters': ['require_debug_false'],
'class': 'django.utils.log.AdminEmailHandler'
}
},
'loggers': {
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': True,
},
}
}

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()

from todo.views import paginator1
from todo.views import paginator2

urlpatterns = patterns('',
# Examples:
# url(r'^$', 'Paginator.views.home', name='home'),
# url(r'^Paginator/', include('Paginator.foo.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)),

('^paginator1/$', paginator1),
('^paginator2/$', paginator2),
)

models.py

# This is an auto-generated Django model module.
# You'll have to do the following manually to clean this up:
#     * Rearrange models' order
#     * Make sure each model has one field with primary_key=True
# Feel free to rename the models, but don't rename db_table values or field names.
#
# Also note: You'll have to insert the output of 'django-admin.py sqlcustom [appname]'
# into your database.

from django.db import models

class Status(models.Model):
id = models.IntegerField(primary_key=True)
text = models.CharField(max_length=900, blank=True)
created_at = models.DateTimeField(null=True, blank=True)
user_name = models.CharField(max_length=600, blank=True)
json = models.TextField(blank=True)
class Meta:
db_table = u'status'

class Todo(models.Model):
id = models.IntegerField(primary_key=True)
title = models.CharField(max_length=900, blank=True)
finished = models.IntegerField(null=True, blank=True)
post_date = models.DateTimeField(null=True, blank=True)
class Meta:
db_table = u'todo'

views.py

from django.shortcuts import render_to_response
from django.template.context import RequestContext

from todo.models import Todo

def paginator1(request):
todos = Todo.objects.all()
return render_to_response('pagination_1.html', {"todos": todos}, context_instance = RequestContext(request))

def paginator2(request):
todos = Todo.objects.all()
return render_to_response('pagination_2.html', {"todos": todos}, context_instance = RequestContext(request))

新建templates文件夹，放置如下2个模版文件。

pagination_1.html

{% load endless %}

{% if todos %}
{% paginate 5 todos %}
<table>
{% for todo in todos %}
<tr>
<td>{{ todo.title }}</td>
</tr>
{% endfor %}
</table>
{% show_pages %}
{% endif %}

pagination_2.html

{% load pagination_tags %}

{% if todos %}
{% autopaginate todos 5 %}
<table>
{% for todo in todos %}
<tr>
<td>{{ todo.title }}</td>
</tr>
{% endfor %}
</table>
{% paginate %}
{% endif %}

同步(初始化)数据库后即可运行演示程序。