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All snippets written in Python

2956 snippets

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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
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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
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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
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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
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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
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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
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PermanentRedirectMiddleware

This is a simple middleware that redirects the exactly URL requested with the correct domain. It is useful when you have more than one domain (most of cases with "www." or IP) to access a website. To make it works, download the snippet file as the name "permanent_redirect.py" and add its path as the first item in MIDDLEWARE_CLASSES setting in settings.py. Later you must inform a setting called `HTTP_HOST_DOMAIN` with the correct domain.

  • middleware
  • redirect
  • permanent
  • seo
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Creator/updater fields for admin

This ModelAdmin class sets fields for models saved in admin corresponding to the user that created the object and the user that last updated the object. Trivial for the current model, but a little more involved to make it work with inlines. The fields still show up as drop-downs (`select`) in the admin, but I fixed that with a little jQuery: $(function(){ $("select[id*='creator'], select[id*='updater']").each(function(){ var user = $('option:selected', this).text(); $(this).siblings('.add-another').hide(); $(this).hide(); $(this).after(user); }); }); This could easily be subverted, but with trusted users, it makes for a quick and dirty read-only field.

  • admin
  • newforms-admin
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Ordering a queryset by _CHOICES

I recently needed to sort a list of objects by cardinal direction clock-wise. Since this is different than alphabetical, and I didn't want to use a dictionary to map to integers, here is what I came up with. There may be a cleaner way to do this by overriding some object methods, but I just thought I'd put this out there anyway.

  • choices
  • ordering
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Custom color field with Javascript color picker

A custom model field 'ColorField' which stores a hex color value like '#FFFFFF' and shows a Javascript color picker in the admin rather than a raw text field. It is written to work with the current trunk (i.e. after newforms-admin merge). You'll need the ColorPicker2.js file found at [www.mattkruse.com](http://www.mattkruse.com/javascript/colorpicker/combined_compact_source.html) (his license prohibits including the file here). This should be placed in the 'js' folder of your admin media. The snippet includes a python source file which can be placed wherever you wish, and a template which by default should be placed in a folder 'widget' somewhere on your template path. You can put it elsewhere, just update the path ColorWidget.render The custom field at present does not validate that the text is a valid hex color value, that'd be a nice addition.

  • newforms
  • javascript
  • models
  • admin
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Translated choices fields

- Choices are saved as the key integers. - Admin will show the correct translation in forms. - You can reuse the make_choices function for other choices fields. - Bad side: bin/make_messages.py won't get the choices values automatically, you have to add them in the .po's by hand.

  • models
  • choices
  • i18n
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LDAP to Django Synchronization

I needed to be able to synchronize my LDAP users and groups to the Django database. This may not be as efficient as some might like but it works like a charm. It returns a list of messages that I pipe into request.user.messages in my template.

  • user
  • auth
  • ldap
  • group
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Display arbitrary models

Template tag for displaying a list of arbitrary models. Useful for life-stream kind of pages that display blog entries, links, photos etc ordered by date. [Example](http://bjornkri.com) **Usage:** something like: {% for object in object_list %} {% display_excerpt object %} {% endfor %} Will look for *app/model_excerpt.html* by default, and fall back on a generic *display_excerpt.html*, or returns the object's string representation as a last fallback. *display_excerpt.html* might look something like: <a href="{{ object.get_absolute_url }}">{{ object }}</a> Any model you throw at it should have a *get_absolute_url* and a string representation of some sort, so this gives you the bare minimum of a title and a link to a detail page. *display_excerpt* takes an optional argument to set the template suffix. This might be handy for generating different formatting for feeds, for instance: {% for object in object_list %} {% display_excerpt object "feed" %} {% endfor %} This will look for app/model_feed.html to render the object. Got lots of help from mattmcc on #django for this one, thanks!

  • display
  • excerpt
  • lifestream
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