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RequestStack middleware

This is some very simple middleware that keeps track of the last 3 succesful requests for each visitor. This can be useful if you want to redirect the visitor to a previous path without relying on a hidden field in a form, or if you simply want to check if a visitor has recently visited a certain path. Note that this relies on the session framework and visitors actually accepting cookies. This can be easily modified to hold more requests if you have a need for it.

  • middleware
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Sanitize HTML filter

Originally posted by [akaihola](http://www.djangosnippets.org/users/akaihola/) as [snippet #169](http://www.djangosnippets.org/snippets/169/). I just redid it as a filter.

  • html
  • sanitize
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Custom SQL Function; Outputs Template-Friendly Content

This will return a template-friendly list of dictionaries when using custom SQL. The dictionary can be accessed just as a normal model/queryset. Example of use (in view): qkeys = ['artist','album'] query = """ SELECT "artist","album" FROM "music" """ new_list = csql(request,query,qkeys) (in template) {% for row in new_list %} {{ row.artist }} {{ row.album }} {% endfor %}

  • templates
  • custom-sql
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newforms field callback helper

**Now redundant any anything >0.96**, as `form_for_*` methods now have a `fields` attribute `formfield_callback`s are a bit difficult to use, here's a helper method to create a callback function to use with the `form_for_instance` and `form_for_model` methods. Example usage: person_callback = new_callback(exclude=['password', 'can_add_staff', 'is_staff']) def form_for_person(person): return form_for_instance(person, formfield_callback=person_callback)

  • newforms
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Timedelta template tag

This is tag similar to *timesince* and *timeuntil*, which work great until you starting giving timesince dates in the future or timeuntil dates in the past. Timedelta tag will humanize output correctly for both future and past dates using *now* as a default reference date (or a specified reference date as argument) now = Apr 27 2007 futuredate = May 5 2007 pastdate = Jan 5 2007 {{ futuredate|timedelta }} will output "in 1 week, 1 day" {{ pastdate|timedelta }} will output "3 months, 2 weeks ago"

  • template
  • date
  • time
  • humanize
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youtubize template tag

This snippet is based on djangos urlize filter. It converts http:// links to youtube into youtube-embed statements, so that one can provide a simple link to a youtube video and this filter will embed it. I used it for a fun blog app.

  • youtube
  • embed
  • urlize
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Single Django App behind multiple Apache Proxies

** Django Proxied Behind Apache Path** Middleware and Context Processor for django applications behind a proxy like Apache's mod_proxy. Setting an HTTP header with the base path of the django application in the Apache mod_proxy configuration, we can pull that variable out of the request and adjust our template URIs and redirects. This allows us to serve the same Django application out from behind multiple VirtualHosts at different URL paths. Example use in templates: <a href="{{ base_path }}/login/">Login</a> Example Apache configuration: <LocationMatch ^/path/to/django/app/.*> RequestHeader set X-Base-Path "/path/to/django/app" </LocationMatch> RewriteRule ^/path/to/django/app/(.*) http://django-host:8080/$1 [P,L] In settings.py: VHOST_HEADER = "HTTP_X_BASE_PATH"

  • apache
  • virtualhost
  • mod_proxy
  • path
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encode_mailto

This is a django filter which will create an html mailto link when you use the syntax: {{ "[email protected]"|encode_mailto:"Name" }} Results in: <a href="mailto:[email protected]">Name</a> Except everything is encoded as html digits. The encoding is a string of html hex and decimal entities generated randomly. If you simply want a string encoding use: {{ "name"|encode_string }} This was inspired by John Gruber's [Markdown](http://daringfireball.net/projects/markdown/syntax#autolink) project

  • filter
  • email
  • encode
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Ignore HTTP Accept-Language headers

A little tiny middleware that, when used in multilingual sites, will make Django I18N ignore any `Accept-Language` headers in the request, thus ensuring that every first-time visitor (with no explicit language preference set via session or cookie) will see the site in the language specified by `settings.LANGUAGE_CODE`. (Please note that I think that overriding user preferences is generally a bad practice, but I had my reasons to use it :) )

  • middleware
  • i18n
  • l10n
  • locale
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Wizard class

Wizard class - subclass this, supply a done() method and then you can use `MyWizard( [list, of, newforms, classes])` as a view function. see [#3218](http://code.djangoproject.com/ticket/3218)

  • newforms
  • form
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a template tag to invoke a method on an object with a variable

The django templating language is quite nice, and specifically limited to guide people in to making their business logic in the view, not in the template itself. Sometimes it can be difficult to do certain things in the template even though it seems like the most appropriate place to do this. I have an application that is heavily influenced by the user that is logged in in several ways. For example let us say I have a list of forums. Each forum has several discussions full of posts. This system of forums and discussions has permissions such that some users can not see some entities. Now, I can produce in the view the query set of what forums a user is allowed to see, and I want this list to display the latest post in each of those forums, but I have to restrict that to the posts that they can see. Easy enough, I have a method on the Forum object that takes a user object and does the appropriate filter to return the latest post that the user can see. The trick is the template is passed the query set of forums, and then iterates through them using the template language. How can it invoke the method on the forum for the latest post that needs the 'user' variable from the template context? The template language lets me say 'forum.latest_post' but I need to pass in 'user'. 'forum.latest_post(user)' does not work because the template language does not allow it. This tag lets me specify an object, the method on that object to call, and the variable to pass to that method. It is not the prettiest thing but with this add on you can do: `{% method_arg forum latest_post user as post %}`

  • tags
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The chunkmaker

This is a general-purpose utility function, but since it uses lazy sequences via itertools, so it should be suitable for use with Querysets.

  • python
  • utility
  • sequence
  • itertools
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Author: pbx
  • 4
  • 3