Type less with newforms admin

I recently converted a site with over 60 models to newforms admin. I like the seperation of the display from the defintion, but it does introduce quite a bit more typing which isn't in the spirit of Django DRY... I particular I got bored of typing admin.site.register(Model, ModelAdmin) Over and over again so I wrote this little bit of code which does a bit of introspection. It assumes that 1. You import all your models into your admin.py, ie from "myapp.models import *" 2. The admin class for Model is called ModelAdmin Put this snippet at the end of your admin.py I hope that saves someone a bit of typing!

• admin

Sun 11 Jul 2010 Read More

Render (with RequestContext)

In order to context_processors work, you need to use the RequestContext instead of Context. This is a shortcut I use.

• requestcontext
• template
• render

Sun 11 Jul 2010 Read More

isUnique validator for newforms

This is a generic unique field value validator for use with newforms. ( It's handy to plug into newforms-admin.) Example, with newforms-admin: ` class LinkAdminForm( ModelForm ): def clean_url( self ): return isUnique( self.instance, 'url', self.cleaned_data['url']) class LinkAdmin( ModelAdmin ): form = LinkAdminForm site.register( Link, LinkAdmin ) `

• newforms
• admin
• unique

Sun 11 Jul 2010 Read More

Serializing booleans correctly when doing dumpdata from a MySQL database using Django 0.96

Django 0.96 seems to have a bug when serializing from MySQL. BooleanFields are encoding as 0/1 instead of true/false. Hacking the python serializer seems to fix that. The bug shows up as (fx. when using loaddata on a dump from MySQL in PostgreSQL): Problem installing fixture '/tmp/data.json': ERROR: column "is_staff" is of type boolean but expression is of type integer HINT: You will need to rewrite or cast the expression.

• dumpdata
• 0.96
• seralization

Sun 11 Jul 2010 Read More

[middleware] Rewrite anchors to point into Coral CDN

This simple middleware rewrites the 'href' attribute of any `<a>` tags in your response content. The URL href is modified by appending the string '.nyud.net', which causes the Coral Content Distribution Network to retrieve a copy of the page and cache it before returning it to the user agent. This might be useful if you're writing another Slashdot and you want to avoid turning the servers you link to into smoking craters. You [should be able](http://www.djangosnippets.org/snippets/910/) to apply this functionality to a single view as well (though I haven't tried this yet).

• middleware
• coral
• cdn
• anchor-rewrite

Sun 11 Jul 2010 Read More

syncdata command

A django admin command that takes a fixture and makes the target database the same as that fixture, deleting objects that in the database but not in the fixture, updating objects that are different in the database, and inserting missing ones. Place this code in your_app/management/commands/syncdata.py You will need to use manage.py (not django-admin.py) for Django to recognise custom commands (see http://www.djangoproject.com/documentation/django-admin/#customized-actions). This snippet is the 'loaddata' command with this patch applied: http://code.djangoproject.com/ticket/7159 (with minor tweaks). The intention is that 'dumpdata' on system A followed by 'syncdata' on system B is equivalent to a database copy from A to B. The database structure in A and B must match.

• admin
• database
• import
• commands
• copy
• command
• synchronise
• publish

Sun 11 Jul 2010 Read More

format content and make url to tinyurl

Python make url address to Tinyurl in article content like Twitter message

• tinyurl
• shorturl

Sun 11 Jul 2010 Read More

Update All Apps to Latest Revision

This snippet is based on [#844](http://www.djangosnippets.org/snippets/844/ "#844") and [#892](http://www.djangosnippets.org/snippets/892/ "#892") and updates all apps in the current directory using hg, svn, git or bzr. Including subdirectories not under version control (subfolders to keep your stuff organized). For example: python/lib/ django-trunk/ django-0.96/ pydelicious/ (...) django-apps/ django-tagging/ django-pagination/ django-registration/ django-threadedcomments/ django-mptt/ (...) The script will iterate through all of your apps (in the current dir and also recursively in subdirs NOT under version control) and update them to the latest version. To run, simply execute: python update_apps.py in the desired parent folder. Just in case it could be useful: In my case I'm using MAC OS X. I have a folder full of miscellaneous scripts under my HOMEDIR, with this content: /Users/Dedaluz/bin/update_apps.py /Users/Dedaluz/bin/update_apps (this is a bash script) The update_apps script contains simply: #!/bin/bash python /Users/Dedaluz/bin/update_apps.py Then I put this folder in my path, so in my /HOMEDIR/.bash_profile I add this line export PATH=$PATH:$HOME/bin And I just can update from any parent folder just going there and typing: update_apps

• script
• update
• svn
• git
• hg
• bzr

Sun 11 Jul 2010 Read More

SessionMessages

Creates a message list, but unlike the messaging system in django.contrib.auth it is session-persistent and can therefor be displayed after a redirect.

• messages
• sessionstore

Sun 11 Jul 2010 Read More

Pledgie data parser

This one uses - and is very similar to - http://www.djangosnippets.org/snippets/852/ It gets the data from a pledgie.com campaign and parses it.

• pledgie
• donation
• parser

Sun 11 Jul 2010 Read More

Accessing Environment Variables in Views

This snippet uses the [django-environment project](http://code.google.com/p/django-environment/). Django-environment is used to provide "environment variables" to django apps.

• django-environment

Sun 11 Jul 2010 Read More

Brazillian freight calculator (Correios)

This snippet calculates Brazillian freight through Correios website. * parameter ´peso´(weight) measured in grams

• correios
• freight

Sun 11 Jul 2010 Read More

sorl.thumbnail processor: white background

If you want to resize transparent PNGs with the `{% thumbnail %}` templatetag, they'll sometimes get an ugly black background that looks even more ugly on a white background. This processor puts the image on a white background. You can simply change the background color by replacing `white` with any other color. To use this filter simple put the following two lines of code in your settings file: from sorl.thumbnail.defaults import PROCESSORS as THUMBNAIL_PROCESSORS THUMBNAIL_PROCESSORS = ('path.to.white_background',) + THUMBNAIL_PROCESSORS

• png
• background
• sorl.thumbnail

Sun 11 Jul 2010 Read More

very simplistic url cache flushing

This is an (overly simple) example of how to manually delete something from the cache. Usage is simply `delete_url_cache('/some_view/')` This most likely doesn't work when using Vary headers but does seem to work fine for the most general case of simply needing to programmatically flush the cache after certain actions.

• cache

Sun 11 Jul 2010 Read More

Replace Paragraph Tags for Flash

This template tag does two things needed to display content from something like a TextField wrapped with TinyMCE in Flash's htmlText component: 1. Replace `<p>` tags with `<br />` 2. Strip all occurances of `\n`

• template
• tag

Sun 11 Jul 2010 Read More