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All snippets written in Python

2959 snippets

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auto image field w/ prepopulate_from & default

Given such code: class ProductImage(models.Model): fullsize = models.ImageField(upload_to= "products/%Y/%m/%d/") display = AutoImageField(upload_to= "products/%Y/%m/%d/",prepopulate_from='fullsize', size=(300, 300)) thumbnail = AutoImageField(upload_to="products/%Y/%m/%d/",null=True,default='/media/noimage.jpg')) display will be automatically resized from fullsize, and thumbnail will default to /media/noimage.jpg if no image is uploaded Note: At some point the code broke against trunk, which has now been updated to work properly

  • image
  • models
  • db
  • field
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ImageFSStorage

A custom FileSystemStorage made for normalizing extensions. It lets PIL look at the file to determine the format and append an always lower-case extension based on the results.

  • storage
  • images
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Require login by url

An example of using it in your settings.py: MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.middleware.doc.XViewMiddleware', 'util.loginmiddleware.RequireLoginMiddleware', ) LOGIN_REQUIRED_URLS = ( r'/payment/(.*)$', r'/accounts/home/(.*)$', r'/accounts/edit-account/(.*)$', ) In a nutshell this requires the user to login for any url that matches against whats listing in LOGIN_REQUIRED_URLS. The system will redirect to [LOGIN_URL](http://www.djangoproject.com/documentation/settings/#login-url)

  • middleware
  • authentication
  • url
  • login
  • auth
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Expose the 404/500 views during development

A simple addition for the urls.py that exposes the 404/500 templates during development. This way you can test how those look. They're mounted under /404/ and /505/ respectively. Add this at the bottom of your main urls.py.

  • development
  • debug
  • urlsconf
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Imagefield with variations

Usage: from django.db import models from imagevariations.fields import ImageVariationsField, Thumbnail class Image(models.Model): name = models.CharField(max_length=20) image = ImageVariationsField(upload_to='testimages', variations=(Thumbnail,) ) How to use in templates: Use the lowercase name of the image variation class. {{ object.image.variations.thumbnail.url }} By default all image variations will use the same storage backend as the field but can be replaced per variation by setting self.storage on the variation class.

  • thumbnail
  • imagefield
  • variations
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Localized digits

Arabic and Farsi languages use their own digits. This template filter translates any digits in the supplied unicode string into the correct ones for the language. The previous version used StringIO to parse the string one character at a time. It now uses regular expressions. I just saw that kcarnold created two snippets that also removed the need for StringIO: [981](http://www.djangosnippets.org/snippets/981/) and [982](http://www.djangosnippets.org/snippets/982/). That last snippet is almost the same as this one.

  • i18n
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Localized digits

This is based on [980](http://www.djangosnippets.org/snippets/980/), removing the unnecessary use of StringIO. Hopefully the translation can be educational.

  • i18n
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Localized digits (re)

Another one like [980](http://www.djangosnippets.org/snippets/980/), but using re's instead. I haven't benchmarked these, but my guess is that [981](http://www.djangosnippets.org/snippets/981/) is faster for strings of pure digits and this is faster for larger chunks of text that happen to contain digits. If you're generating the numbers yourself, I'd just use 981 on a number right when you generate it.

  • i18n
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is_staff decorator

Decorator for views that checks that the user is staff, redirecting to the log-in page if necessary. A wrapper for user_passes_test decorator based on login_required Possible usage: @is_staff def view.... urlpatterns = patterns('', (r'^databrowse/(.*)', is_staff(databrowse.site.root)), )

  • decorator
  • auth
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Manager method for limiting GenericForeignKey queries

This is a simple manager that offers one additional method called `relate`, which fetches generic foreign keys (as referenced by `content_type` and `object_id` fields) without requiring one additional query for each contained element. Basically, when working with generic foreign keys (and esp. in the usecase of having something like a tumblelog where you use an additional model just to have a single sorting point of multiple other models), don't do something like `result = StreamItem.objects.select_related()` but just fetch the content type with `result = StreamItem.objects.select_related('content_type')`, otherwise you will end up with first one query for the list of StreamItems but then also with one additional query for each item contained in this resultset. When you now combine the latter call with `result = StreamItem.gfkmanager.relate(result)`, you will just get the one query for the item list + one query for each content type contained in this list (if the models have already been cached). For further details, please read [this post](http://zerokspot.com/weblog/2008/08/13/genericforeignkeys-with-less-queries/) on my blog.

  • foreignkey
  • generic
  • manager
  • query
  • tuning
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Serve static media and indexes from app directories [Python2.5, Development only]

This view serves static media and directory indexes for a django application. It should only be used in development, media should be provided directly by a web server in production. This view assumes a django application stores its media in app/media (which is very common) and the file is referred to in the templates by the last part of a django app path. e.g. As in django.contrib.admin -> 'admin'. First we check if the media is a request in an application directory; if so we attempt to serve it from there. Then we attempt to provide the document from the document_root parameter (if provided). To use this view you should add something like the following to urls.py: ` if settings.DEBUG: urlpatterns += (r'^media/(?P<path>.*)$', 'site.media.serve_apps', {'document_root' : settings.MEDIA_ROOT}) ` You can then have the admin media files served by setting ADMIN_MEDIA_PREFIX = '/media/admin/'

  • media
  • static-media
  • directory-index
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Translation statistics gatherer

A script that gathers statistics of translated, untranslated and fuzzy literals of translations (be it Django itself or a project using Django). For that it re-scans the tree and generates a up-to-date POT in a temporary location, so the statistics of translation "coverage" are calculated relative to the current status of the tree. It doesn't touch the tree it is analyzing at all. It should be run from the directory containing the `locale/` directory of your project or from the `django/` directory of a Django copy. It is based on the `makemessages` Django management command (or rather its previous standalone `make-messages.py` script incarnation) and uses the same command line switches: * `-d <domain>` -- `<domain>` is `django` or `djangojs`. Optional, defaults to `django`. * `-l <language>` OR * `-a` -- process all languages

  • internationalization
  • i18n
  • l10n
  • translations
  • status
  • statistics
  • localization
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debug info middleware

Hi, I have developed a middleware that enables to view debugging information in production for a single user filtered by useragent or ip. The debug info is appended to the html code as a remark and can be viewed with a view source operation from the browser. Take a look at http://code.google.com/p/debugview/ Enjoy

  • middleware
  • django
  • debug
  • information
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SiteRedirectMiddleware

Redirects to the default site (from Django's Sites contrib app), specified by the `SITE_ID` setting. That's for example useful if you configured your webserver to handle multiple domains with the same virtual host and want to make sure every requests is then redirected to the right domain.

  • middleware
  • sites
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