| author | Lennard de Rijk <ljvderijk@gmail.com> |
| Sat, 05 Sep 2009 14:04:24 +0200 | |
| changeset 2862 | 27971a13089f |
| parent 109 | 620f9b141567 |
| permissions | -rw-r--r-- |
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109
620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
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parents:
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================= |
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620f9b141567
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parents:
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The flatpages app |
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parents:
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================= |
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parents:
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parents:
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Django comes with an optional "flatpages" application. It lets you store simple |
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parents:
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"flat" HTML content in a database and handles the management for you via |
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parents:
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Django's admin interface and a Python API. |
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parents:
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parents:
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A flatpage is a simple object with a URL, title and content. Use it for |
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parents:
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one-off, special-case pages, such as "About" or "Privacy Policy" pages, that |
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parents:
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you want to store in a database but for which you don't want to develop a |
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parents:
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custom Django application. |
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parents:
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A flatpage can use a custom template or a default, systemwide flatpage |
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parents:
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template. It can be associated with one, or multiple, sites. |
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parents:
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620f9b141567
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parents:
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Here are some examples of flatpages on Django-powered sites: |
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parents:
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* http://www.chicagocrime.org/about/ |
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* http://www.lawrence.com/about/contact/ |
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parents:
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parents:
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Installation |
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parents:
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============ |
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parents:
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parents:
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To install the flatpages app, follow these steps: |
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parents:
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parents:
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1. Add ``'django.contrib.flatpages'`` to your INSTALLED_APPS_ setting. |
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parents:
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2. Add ``'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware'`` |
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to your MIDDLEWARE_CLASSES_ setting. |
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parents:
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3. Run the command ``manage.py syncdb``. |
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parents:
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parents:
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.. _INSTALLED_APPS: ../settings/#installed-apps |
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.. _MIDDLEWARE_CLASSES: ../settings/#middleware-classes |
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parents:
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620f9b141567
Load ../../google_appengine into trunk/thirdparty/google_appengine.
Todd Larsen <tlarsen@google.com>
parents:
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How it works |
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parents:
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============ |
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parents:
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parents:
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``manage.py syncdb`` creates two tables in your database: ``django_flatpage`` |
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parents:
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and ``django_flatpage_sites``. ``django_flatpage`` is a simple lookup table |
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that simply maps a URL to a title and bunch of text content. |
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``django_flatpage_sites`` associates a flatpage with a site. |
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parents:
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parents:
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The ``FlatpageFallbackMiddleware`` does all of the work. Each time any Django |
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application raises a 404 error, this middleware checks the flatpages database |
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parents:
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for the requested URL as a last resort. Specifically, it checks for a flatpage |
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parents:
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with the given URL with a site ID that corresponds to the SITE_ID_ setting. |
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parents:
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620f9b141567
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parents:
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If it finds a match, it follows this algorithm: |
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* If the flatpage has a custom template, it loads that template. Otherwise, |
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parents:
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it loads the template ``flatpages/default``. |
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* It passes that template a single context variable, ``flatpage``, which is |
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parents:
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the flatpage object. It uses RequestContext_ in rendering the template. |
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If it doesn't find a match, the request continues to be processed as usual. |
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The middleware only gets activated for 404s -- not for 500s or responses of any |
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parents:
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other status code. |
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Note that the order of ``MIDDLEWARE_CLASSES`` matters. Generally, you can put |
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parents:
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``FlatpageFallbackMiddleware`` at the end of the list, because it's a last |
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parents:
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resort. |
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For more on middleware, read the `middleware docs`_. |
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.. _SITE_ID: ../settings/#site-id |
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.. _RequestContext: ../templates_python/#subclassing-context-djangocontext |
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.. _middleware docs: ../middleware/ |
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How to add, change and delete flatpages |
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======================================= |
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parents:
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parents:
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Via the admin interface |
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----------------------- |
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parents:
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If you've activated the automatic Django admin interface, you should see a |
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"Flatpages" section on the admin index page. Edit flatpages as you edit any |
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other object in the system. |
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parents:
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Via the Python API |
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------------------ |
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parents:
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parents:
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Flatpages are represented by a standard `Django model`_, which lives in |
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parents:
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`django/contrib/flatpages/models.py`_. You can access flatpage objects via the |
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`Django database API`_. |
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.. _Django model: ../model_api/ |
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.. _django/contrib/flatpages/models.py: http://code.djangoproject.com/browser/django/trunk/django/contrib/flatpages/models.py |
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.. _Django database API: ../db_api/ |
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Flatpage templates |
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parents:
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================== |
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parents:
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parents:
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By default, flatpages are rendered via the template ``flatpages/default.html``, |
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parents:
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but you can override that for a particular flatpage. |
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parents:
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parents:
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Creating the ``flatpages/default.html`` template is your responsibility; in |
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parents:
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your template directory, just create a ``flatpages`` directory containing a |
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parents:
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file ``default.html``. |
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parents:
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parents:
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Flatpage templates are passed a single context variable, ``flatpage``, which is |
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parents:
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the flatpage object. |
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Here's a sample ``flatpages/default.html`` template:: |
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" |
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parents:
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"http://www.w3.org/TR/REC-html40/loose.dtd"> |
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108 |
<html> |
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109 |
<head> |
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<title>{{ flatpage.title }}</title>
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</head> |
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parents:
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112 |
<body> |
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parents:
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{{ flatpage.content }}
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</body> |
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parents:
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</html> |