A ModelChoiceField with support for title in options based on a field in the model

ModelChoiceTitleField is a ModelChoiceField descendent that creates <OPTIONS> with title elements based on the field specified in title_source_field: priority=ModelChoiceTitleField(Priority.objects.all(), initial=Priority.objects.get(default=True).id, title_source_field='long_description') That will generate a `<SELECT>` element looking like: <select name="priority" id="id_priority"> <option value="1" title="Some extremely important task.">Emergency</option> ... </select> In the `<option>` above, the title was retrieved from the `long_description` field for the instance of the Priority class. The word Emergency came from a call to the instance of the Priority class' `__unicode__()` method. The value of the option is the PK for the instance of the Priority class.

• ModelChoiceField

Sun 08 Aug 2010 Read More

Django csrf_token Template Tag Fix

If you currently use `{% csrf_token %}`, you will notice it prints a hidden div, and an xHTML input tag. What if you don't want that hidden div, and/or you want your page to validate with HTML and not xHTML. This snippet returns only the csrf token itself, and none of the related HTML code. You can use it like this. `<input type="hidden" name="csrfmiddlewaretoken" value="{% with csrf_token as csrf_token_clean %}{{ csrf_token_clean }}{% endwith %}" >`

• csrf_token
• csrf_token_clean

Sat 31 Jul 2010 Read More

CurrentSessionIDMiddleware

The middleware assigns a unique identifier for session. The session id doesn't depend of session or whatever else. It only need cookies to be turned on. The session id is reassigned after client close a browser. Identifier of the session could be read from request: request.current_session_id. You can setup name of the cookie in yours settings module (FLASH_SESSION_COOKIE_NAME). request.current_session_id is lazy. It means the ID will be assigned and cookie will be returned to client after first usage.

• middleware
• session

Tue 10 Aug 2010 Read More

Middleware to resolve current URL to module and view

Add it to MIDDLEWARE_CLASSES and you will get request.current_view getting values like "connection.views.index" or "django.views.static.serve" - one example usage is to show different help text based on current view name. EDIT: actually, you can use process_view middleware function where you automatically get current_view as first parameter.

• middleware
• view
• url
• resolve

Tue 20 Jul 2010 Read More

Simple Syslog Logging Class with Decorator

Simple logging decorator. Logs the function name along with the message. `Jul 14 16:10:42 mtzion test_func: 1 two` Define SYSLOG_FACILITY in settings.py. import syslog SYSLOG_FACILITY = syslog.LOG_LOCAL1

• decorator
• logging
• syslog

Sun 18 Jul 2010 Read More

Template filter to turn Twitter names into links

Quick and simple twitterize filter to turn Twitter usernames into profile links on your own sites. Add the filter code to your own template tags (http://docs.djangoproject.com/en/dev/howto/custom-template-tags/).

• twitter
• twtterize

Wed 14 Jul 2010 Read More

Get actual child model in multi-table inheritance

A common problem (it hit the Django mailinglist a couple of times) is that if you get `models.Topping.objects.all()`, you get a list of toppings, although they stand for other classes such as `SalamiTopping` or `CheeseTopping`. If you need the actual object, just derive `Topping` from `PolymorphicModel`, and say `topping.actual_instance`. This will give you e.g. a `SalamiTopping`. Sometimes you just want to check for the actual class. You can get it by saying `topping.content_type.model_class()`. There is a slight performance impact when creating objects because they have to be saved twice. NEWS: A good alternative to this approach is the [InheritanceManager](https://github.com/carljm/django-model-utils/blob/master/README.rst).

• models
• child-model
• multi-table-inheritance
• polymorphy

Tue 21 Dec 2010 Read More

Parse datetime model field to string

Checks the type of the field (date / time / date-time) and returns corresponding value as a string.

• datetime
• string
• parse

Sun 11 Jul 2010 Read More

Use MEDIA_URL in flatpages with SSL

This is a copy of [snippet 654](http://djangosnippets.org/snippets/654/), modified to allow dynamic MEDIA_URL, as you might need that for SSL in combination with [snippet 1754](http://djangosnippets.org/snippets/1754/). This is a template filter to enable the use of the MEDIA_URL setting in content from the flatpages database table. It searches for {{ MEDIA_URL }} and replaces it with the current MEDIA_URL added by a context processor. Note: To set up, drop the above code into a file called media_url.py in your templatetags directory in one of your INSTALLED_APPS, and add the filter to your flatpages template like so: {% load media_url %} {{ flatpage.content|media_url:MEDIA_URL }}

• filter
• ssl
• context
• flatpages
• processor

Sun 11 Jul 2010 Read More

modular settings / site settings

a snippet to split up settings or to reuse and modify settings

• settings
• custom
• modular

Sun 11 Jul 2010 Read More

Django Jalali Calendar Widget

This is a simple calendar widget in Django 1.2 for Jalali Calendar usages. It actually sends a Gregorian value to server, so if you need further manipulations, you can use [GNU Jalali Calendar](http://home.gna.org/jalali-calendar/). You should also have [JalaliJSCalendar](http://farhadi.ir/works/jalalijscalendar) set up in your project. Also posted on: [Django Jalali Calendar Widget](http://texscribbles.blogspot.com/2010/06/django-jalali-calendar-widget.html)

• calendar
• widget
• jalali
• farsi
• persian

Sun 11 Jul 2010 Read More

urlize HTML

The default Django urlize filter does not work with html nicely so here I've used an HTML parser [BeautifulSoup](http://www.crummy.com/software/BeautifulSoup/) to quickly search through each text node and run the django urlize filter on it. Optimizations could be made to include a regex in the soup.findAll() method's text argument to only search those text nodes which matched a url pattern. You could also modify the method to convert the text to urls, such as using your own custom url filter.

• beautifulsoup
• html
• urlize
• parser
• html parser

Sun 11 Jul 2010 Read More

Testserver: --noinput option, sending a signal

Makes manage.py testserver accept a `--noinput` argument to delete test database without asking if it already exists; makes it emit `django.core.management.commands.testserver.testserver_setup` signal after fixtures are loaded and before server itself is started to allow custom postprocessing.

• django
• patch
• testserver

Sun 11 Jul 2010 Read More

Class-based coverage test runner

A coverage test runner that uses the class-based runner introduced with Django 1.2. Put it in your python path and add to your `settings.py`: TEST_RUNNER = 'path_to.CoverageRunner' COVERAGE_MODULES = [ 'blog.views', 'projects.views', 'middleware', ] Compatible with Django 1.2 and higher. You also need Ned Batchelder's `coverage.py` module (`pip install coverage`).

• test
• runner
• coverage

Sun 11 Jul 2010 Read More

icon shortcut - pseudohtml tag with attribute merging and variables resolving

A shortcut for generating img-s with predefined classes and attributes that mimics a html tag, while resolving context variables inside {% %} without crutches like tag/stuff/endtag. Used as `{% icon test class="spam" eggs="{{ object.pk }}" %}` yields `<img src="http://host.tld/media/icons/test.png" alt="" class="icon16 spam" eggs="42"/>`. Not customizable here for simplicity.

• html
• macro

Sun 11 Jul 2010 Read More