Prevent Django newcomments spam with Akismet (reloaded)

This is a rewrite of [snippet #1006](http://www.djangosnippets.org/snippets/1006/) to use the moderation features available in Django's comments framework. This is more customizable than the signals approach and works well if other moderation features are being used. If you want to make comments that are flagged as spam become hidden instead of deleted, change the allow() method to moderate(). [See the blog post here](http://sciyoshi.com/blog/2009/jul/17/prevent-django-newcomments-spam-akismet-reloaded/)

Custom management command to list recent admin actions

On a busy site it can be nice to have a summary of admin activity. Running this command (I call it "adminlog") generates output like this: 2009-07-10 18:06:19: pbx changed flat page: "/yay/ -- Let's All Say Yay" By default it shows the last five actions; pass it a numerical arg to show more or fewer. Run this as a cron job and you can follow a site's admin-side activity without even logging in!

slug filename

A one-liner that I use all the time: Set `upload_to` to something based on the slug and the filename's extension. Just add this function to the top of your models and use it like this: image = models.FileField(upload_to=slug_filename('people')) and the `upload_to` path will end up like this for eg `myfile.jpg`: people/this-is-the-slug.jpg Enjoy!

manually models unique_together check via signals

signal handler for checking unique_together manually. Also available via django-tools: http://code.google.com/p/django-tools/

TRAC-Ticket on exception

This is a small approach to have a middleware which automatically creates a ticket in an existing Trac environment. **Note:** you must have the [XML-RPC-Plugin](http://trac-hacks.org/wiki/XmlRpcPlugin) installed. Extend the attrs-dict to your needs. For example: in my case I have the SensitiveTicket-Plugin installed - automatically created tickets are marked as sensitive and are not visible to the public.

sortby template tag

This is a variation on dictsort that assumes objects with attributes, not dictionaries. Example usage: {% for book in author.book_set.all|sortby:'title' %}

Get boolean value from request send by Ajax

gets the value from request and returns it's boolean state

Ensure ugettext is available absolutely everywhere

Put this into the __init.py__ file in the root of your project (the same directory level as urls.py and settings.py) and this installs _() as a global reference into the current running python VM, and now it’s as universally available as int(), map(), or str(). This is, of course, controversial. Modifying the python global namespace to add a function can be considered maintenance-hostile. But the gettext feature is so universal– at least to me– that __init__.py is where it belongs.

Ensure submitted slugs do not conflict with existing resolvable URLs

This code overrides the existing RegistrationForm in django-registration and adds a new validation step. In this step, the username (my example slug) is compared against all the existing URLs that the application currently resolves and, if it *does* successfully resolve, throws a validation exception. This indicates that the username chosen would be overriden (or, if you wrote your urls.py file badly, would override) an existing URL already recognized by your application. A much longer explanation can be found at [Dynamic names as first-level URL path objects in Django](http://www.elfsternberg.com/2009/06/26/dynamic-names-as-first-level-url-path-objects-in-django/).

invalidation of cache-template-tag cache

this function invalidates a template-fragment cache bit. say you have: {% load cache %} {% cache 600 user_cache user.id %} something expensive here {% endcache %} maybe you want to force an update. With this function you can, just call: invalidate_template_cache("user_cache", user.id)

A tip for preserving GET arguments with pagination

This snippet shows a way to preserve GET arguments with pagination. Many people make mistakes to omit the query arguments besides page arguments for the pagination, and making sure correct may sphagettize your code.

Format Haystack's result with a sprat template

RESTful class dispatch

Yet another implementation of class based RESTful dispatch. This particular implementation features: * You do not have to call __init__ from the derived classes. * Avoids __metaclass__ which (in our environment) led to unexpected method override behavior. * Method names match the google webapp API. * One new instance per request to reduce errors in multi-threaded code. Snippets of inspiration: * [436](http://www.djangosnippets.org/snippets/436/) * [437](http://www.djangosnippets.org/snippets/437/) * [1071](http://www.djangosnippets.org/snippets/1071/) * [1072](http://www.djangosnippets.org/snippets/1072/) * [1226](http://www.djangosnippets.org/snippets/1226/)

Soft Timeout Middleware

This middleware implements a "soft timeout". This means the admin is sent an email whenever a page time exceeds a certian value. It is intended to run on production servers to inform the admin of any pages which are performing slowly.

Models with database views

This example shows, how to use database views with django models. NewestArticle models contains 100 newest Articles. Remember, that NewestArticle model is read-only. Tested with mysql.