ached decorator for functions
example: @cached() def foo(slug): return Egg.objects.filter(slug=slug)
- cache
Snippet List
multiple image upload with formset example
example formset views for multiple image upload hope its useful ...
- formset
- imageupload
- imageupload-example
Encoding datetime for JSON consumers like YUI
Passing datetimes from Python to a [YUI DataTable](http://developer.yahoo.com/yui/datatable/) via JSON served by [django-piston](http://bitbucket.org/jespern/django-piston/) turned out to be surprisingly rocky. This code actually works with ``YAHOO.lang.JSON.stringToDate`` (*not* ``YAHOO.util.DataSource.parseDate``) which cannot handle time zone specifiers other than "Z" or dates without timezones. The YUI [DataSource](http://developer.yahoo.com/yui/datasource/) which uses this looks something like this - note that simply setting ``format:"date"`` does not work as that uses ``YAHOO.util.DataSource.parseDate``, which uses``Date.parse`` to do the actual conversion, which will involve browser-specific formats and as of this writing only Chrome's native ``Date`` can reliably parse ISO 8601 dates. myDataSource.responseSchema = { resultsList: '…', fields: [ … { key: 'my_date_field', parser: YAHOO.lang.JSON.stringToDate }, ], … };
- javascript
- date
- json
- iso8601
Improved Multiple Model Files
Most other methods I've seen for splitting an app's models across multiple files involve adding a couple lines to every model. This method factors out those duplicate lines into one place.
- model-package
- multiple-model-files
Prevent form tampering of hidden fields
Sometimes, we need to pass hidden fields with an initial value in forms but cannot trust the returned values because it could have been tampered. So here is a form that adds an additional 'hidden' field (called 'form_hash') that hashes all the initial value of hidden fields and checks for tampering. Pretty straightforward to use.
- forms
- hidden
- tampering
SelectDateWidget with format: day, month, year
This is the same as [django.forms.extras.widgets.SelectDateWidget](http://code.djangoproject.com/browser/django/trunk/django/forms/extras/widgets.py#L16) but changing the order of the rendered select boxes to: day, month, year.
- date
- widgets
- widget
- year
- month
- selectdatewidget
- dates
- day
Request time logging middleware
Middleware class logging request time to stderr. This class can be used to measure time of request processing within Django. It can be also used to log time spent in middleware and in view itself, by putting middleware multiple times in INSTALLED_MIDDLEWARE. Static method `log_message' may be used independently of the middleware itself, outside of it, and even when middleware is not listed in INSTALLED_MIDDLEWARE.
- middleware
- debug
- logging
Currency formatting filter
See the function **docstring** for usage. This template filter has a couple of drawbacks: * Uses **locale.setlocale** which, according to the [Python docs](http://docs.python.org/library/locale.html#locale.setlocale), is not thread safe. I don't know how this may affect Django applications. * Requires Python 2.5+. Updated 2011-03-16.
- template
- filter
- currency
- formatting
Front end admin toolbar
This snippet will monkeypatch `django.db.models.Model` to include 7 new methods: * `get_verbose_name` Because you can't access model._meta from templates * `get_verbose_name_plural` * `get_admin_change_url` * `get_admin_delete_url` * `get_admin_history_url` * `get_admin_changelist_url` * `get_admin_add_url` This snippet also gives you the template code to paste to your `base.html` so every front end model instance view of your site will show an admin toolbar for logged in users that have admin access.
- admin
- toolbar
{% eval %} templatetag-evaluate expressions
This templatetag evaluates Python expressions including built-in functions, lambda functions etc... Use with caution.
- template
- templatetag
- exec
- eval
Showell markup--DRY up your templates
The code shown implements a preprocessor for Django templates to support indentation-based syntax. The pre-markup language is called Showell Markup. It allows you to remove lots of close tags and random punctuation. It also has a syntax for cleaning up individual lines of HTML with a pipe syntax for clearly separating content from markup. You can read the docstrings to glean the interface. Here are examples: >> table >> tr >> td Right >> td Center >> td Left >> div class="spinnable" >> ul >> li id="item1" One >> li id="item2" Two %% extends 'base.html' %% load smartif %% block body %% for book in books {{ book }} %% if condition Display this %% elif condition Display that %% else %% include 'other.html' >> tr class="header_row" Original Author | th class="first_column" Commenters | th Title | th Action | th Last words | th By | th When | th >> ol class="boring_list" One | li Two | li Three | li {{ element4|join:',' }} | li Hello World! | b | span class="greeting" ; br Goodbye World! | i | span class="parting_words"; br ; hr >> p class="praise" Indentation-based syntax is so Pythonic! Archive LINK collection.archive referral.pk Home LINK home.home Friends LINK friendship.friends Create a card LINK referrals.create Recent changes LINK activity.recent_changes >> FORM referrals.create {{ form.as_p }} {{ referral.id } | HIDDEN referral
- templates
- dry
- preprocessor
DebugFooter middleware for django 1.0 and higher
Based on Snippet [766](http://www.djangosnippets.org/snippets/766/) & [799](http://www.djangosnippets.org/snippets/799/), edited for django 1.0 and higher.
- sql
- middleware
- debug
reorder apps in admin index
A quick & dirty way of sorting the apps on the admin index page however you want. It requires you to override the default admin/index.html template. The instructions are in the docstring, they assume you insert the code above in a templatetag file called admin_app_order.py
- admin
- reorder
django paginator
This a basic pagination example. It shows new 5 pnews items. We added a code to our template so we can view previous or next pages. It also show us how many pages we have.
- django
- paginator
HTML 5 Firefox 2 Hack
This is a hack to get HTML 5 to work for Firefox 2. It Sends the xhtml content-type to all Gecko based browsers where version is less than 1.9, or "rv:1.9pre" or "rv:1.9a" or "rv:1.9bx" where x is less than 5. I created this hack based on the information I found on this site, http://html5doctor.com/how-to-get-html5-working-in-ie-and-firefox-2/. Just put this code in one of your middleware files (i.e. mysite/middleware.py) and then add it in your MIDDLEWARE_CLASSES in your settings.py. Example: MIDDLEWARE_CLASSES = ( ... 'mysite.middleware.HTML5Firefox2Hack', ... )
- middleware
- html5
3110 snippets posted so far.