=================

The redirects app

=================

Django comes with an optional redirects application. It lets you store simple

redirects in a database and handles the redirecting for you.

Installation

============

To install the redirects app, follow these steps:

    1. Add ``'django.contrib.redirects'`` to your INSTALLED_APPS_ setting.

    2. Add ``'django.contrib.redirects.middleware.RedirectFallbackMiddleware'``

       to your MIDDLEWARE_CLASSES_ setting.

    3. Run the command ``manage.py syncdb``.

.. _INSTALLED_APPS: ../settings/#installed-apps

.. _MIDDLEWARE_CLASSES: ../settings/#middleware-classes

How it works

============

``manage.py syncdb`` creates a ``django_redirect`` table in your database. This

is a simple lookup table with ``site_id``, ``old_path`` and ``new_path`` fields.

The ``RedirectFallbackMiddleware`` does all of the work. Each time any Django

application raises a 404 error, this middleware checks the redirects database

for the requested URL as a last resort. Specifically, it checks for a redirect

with the given ``old_path`` with a site ID that corresponds to the SITE_ID_

setting.

    * If it finds a match, and ``new_path`` is not empty, it redirects to

      ``new_path``.

    * If it finds a match, and ``new_path`` is empty, it sends a 410 ("Gone")

      HTTP header and empty (content-less) response.

    * If it doesn't find a match, the request continues to be processed as

      usual.

The middleware only gets activated for 404s -- not for 500s or responses of any

other status code.

Note that the order of ``MIDDLEWARE_CLASSES`` matters. Generally, you can put

``RedirectFallbackMiddleware`` at the end of the list, because it's a last

resort.

For more on middleware, read the `middleware docs`_.

.. _SITE_ID: ../settings/#site-id

.. _middleware docs: ../middleware/

How to add, change and delete redirects

=======================================

Via the admin interface

-----------------------

If you've activated the automatic Django admin interface, you should see a

"Redirects" section on the admin index page. Edit redirects as you edit any

other object in the system.

Via the Python API

------------------

Redirects are represented by a standard `Django model`_, which lives in

`django/contrib/redirects/models.py`_. You can access redirect

objects via the `Django database API`_.

.. _Django model: ../model_api/

.. _django/contrib/redirects/models.py: http://code.djangoproject.com/browser/django/trunk/django/contrib/redirects/models.py

.. _Django database API: ../db_api/