Login

All snippets written in Python

2959 snippets

Snippet List

UUIDField

This snippet provides a uuid field for models, improving on the work in http://www.djangosnippets.org/snippets/335/

  • model
  • field
  • uuid
Read More

CompressedTextField for Django 1.0+

This snippet updates http://www.djangosnippets.org/snippets/383/ for Django 1.0+, and adds support for sqlite3. Original snippet text: A CompressedTextField to transparently save data gzipped in the database and uncompress at retrieval.

  • text
  • model
  • field
  • compressed
  • gzip
Read More

Generate QR Code image for a string

Generate QR Code image from a string with the Google charts API http://code.google.com/intl/fr-FR/apis/chart/types.html#qrcodes Exemple usage in a template {{ my_string|qrcode:"my alt" }} will return the image tag with * src: http://chart.apis.google.com/chart?chs=150x150&cht=qr&chl=my_string&choe=UTF-8 * alt: my alt"

  • filter
  • template-filter
  • filters
  • template-filters
  • qr-code
  • qr-codes
Read More

Scalable and invalidateble cache_page decorator

This cache_page decorator can be used in replacement to Django's django.views.decorators.cache.cache_page. It resolves two problems: - invalidation (its cache key is not dependent of header nor request, then you can use model signals (or method 'put' in Google App Engine) to invalidate a URL or a list of them) - easier to scale (can be used at once memcached server by many differente servers) Feel free to show me where it can have problems or limitations. **Updated and improved a lot**

  • cache
  • decorator
  • invalidation
Read More

Execute a signal once

Decorates signals for executing only one time Exemple usage : from django.core.mail import EmailMultiAlternatives from django.template.loader import render_to_string from django.contrib.auth.models import User @one def user_welcome(sender, instance, created, **kwargs): # Send a welcome email if created == True and isinstance(instance, User): instance.message_set.create(message=_(u"Ho, Welcome %s!" % instance)) subject, from_email, to = 'Welcome !', '[email protected]', instance.email text_content = render_to_string('mail/welcome.html', { 'user': instance }) msg = EmailMultiAlternatives(subject, text_content, from_email, [to]) msg.send()

  • decorator
  • signals
  • once
Read More

Django Breadcrumbs Snippet

A simple tag to render breadcrumbs. Usage: {% load breadcrumbs %} {% breadcrumbs "['Home','Home','home']" "['Articles','Articles','articles']" "['object','object','object.get_absolute_url']" %} Loads up the template in "modules/breadcrumbs.html" and renders it with a list of items. You can provide the tag either with plain text stuff and named urls as the third argument ( any more arguments per bracket-block is parsed as args / kwargs for the reverse() call ) or the object directly, and the script tries after failing the reverse() to resolve the provided arguments. Have pun.

  • django
  • templatetag
  • breadcrumbs
Read More

Python Calendar wrapper template tag

This tag gives you an iterable Python [Calendar object](http://docs.python.org/library/calendar.html) in your template namespace. It is used in the [django-calendar](http://github.com/dokterbob/django-agenda) project. Use it as follows in your template: {% get_calendar for <month_number_or_variable> <year_or_variable> as calendar %} <table> <tr> <th>Mon</th> <th>Tue</th> <th>Wed</th> <th>Thu</th> <th>Fri</th> <th>Sat</th> <th>Sun</th> </tr> {% for week in calendar %} <tr> {% for day in week %} <td>{{ day.day }}</td> {% endfor %} </tr> {% endfor %} </table>

  • template
  • tag
  • date
  • calendar
Read More

Pretty print SQL of query sets

Install [sqlparse](http://code.google.com/p/python-sqlparse/) with `easy_install sqlparse` and then you can easily debug the SQL like this: def view(request): data = MyModel.objects.filter(something__very=complex) print_sql(data) ... Inspired by [Simon Willison](http://simonwillison.net/2009/Apr/28/)

  • sql
  • queryset
  • sqlparse
Read More

CrashKit Middleware

Catch exceptions and send it along with useful data to [CrashKit](http://crashkitapp.appspot.com/).

  • middleware
  • exception
  • crashkit
Read More
Author: wiz
  • 1
  • 2

testdata tag for templates

The "testdata" tag allows you to inline test data into your templates, similar in spirit to Python doctests. There are two sections--the test data and the actual template to be rendered. In non-test mode your template renders normally from whatever views call it, and there is very little overhead to skip over the test data section (happens at parse time). Here are the goals: 1. Provide convenient way to test templates without surrounding infrastructure. 2. Make templates be self-documenting in terms of expected data. 3. Allow insertion of test data at arbitrary places in template structure. Hello-world looks like this: {% load handytags %} {% testdata %} { 'greeting': 'Hello', 'planet': 'World', } {% --- %} {# This is where the actual template begins #} {{ greeting }} <b>{{ planet }}</b> {% endtestdata %} To invoke it, set up urls.py with something like this: url(r'^testdata/(?P<template_path>.*)', test_template) def test_template(request, template_path): context = {'testdata_use': True} # put request vars into context to help choose # which test data we want to render for field in request.GET: context[field] = request.GET[field] return render_with_request(template_path, context, request) Then call: http://127.0.0.1:8000/testdata/hello_world.html Features: 1. The testdata tag's rendering will expose missing variables a bit more aggressively than Django normally does. 2. You have the full power of the template language to set the test data (which ultimately gets eval'ed as a Python expression). 3. As mentioned above, the tag is mostly unobtrusive. Limitations/caveats: 1. Right now the only data format I support is pure Python, but the tag could be modified pretty easily to support JSON or YAML. 2. The VerboseContext class is pretty heavy-handed--I really just want a hook into Django to tell it to render a section with more strictness about variables. Suggestions welcome. 3. You can put the testdata tag pretty much anywhere, but the normal rules apply...for example, if you are in a template that has the extend tag, you'll want to put the testdata tag in individual blocks.

  • templates
  • testing
  • doctest
  • custom-template-tag
Read More

Default to a static template.

Default to a static template. **Example:** urlpatterns = patterns('', ... # this rule SHOULD BE the last one (r'^(?P<template>[a-z-_/]+/?)?$', 'myproj.apps.myapp.views.static_template'), )

  • template
  • static
  • default
Read More

Content Moderator

This snippet is for [django-flag](http://code.google.com/p/django-flag/) Pinax app to make it generic moderator for any content model. You don't need to modify neither your model nor your views to moderate your flagged content objects.

  • generic
  • pinax
Read More