Amazon S3 browser-based upload form
A Django Form for creating a browser-based upload form that pushes files to Amazon S3. See http://developer.amazonwebservices.com/connect/entry.jspa?externalID=1434
- forms
- upload
- s3
- amazon
Snippet List
Orderable inlines using drag and drop with jQuery UI
An easy way of making inlines orderable using drag-and-drop, using [jQuery UI's](http://ui.jquery.com/) sortable() plugin. First, add an "order" field to the inline models which is an IntegerField, and set that model to use 'order' as its default order_by. Then hook in the JavaScript. This should make them drag-and-drop sortable using jQuery UI, and also hide the divs containing those order fields once the page has loaded. This technique is unobtrusive: if JavaScript is disabled, the order fields will be visible and the user will be able to manually set the order by entering numbers themselves.
- jquery
- inlines
- pyconuk2008
QuerySetManager - easily add new QuerySet methods using a Model inner class
An easy way to add custom methods to the QuerySet used by a Django model. See [simonwillison.net/2008/May/1/orm/](http://simonwillison.net/2008/May/1/orm/) for an in-depth explanation.
- orm
- manager
- queryset
RestView - class for creating a view that dispatches based on request.method
Sometimes it's useful to dispatch to a different view method based on request.method - e.g. when building RESTful APIs where GET, PUT and DELETE all use different code paths. RestView is an extremely simple class-based generic view which (although it's a stretch to even call it that) which provides a simple mechanism for dividing up view logic based on the HTTP method.
- rest
- view
- classbasedgenericviews
Log Django exceptions to Apache error log in mod_wsgi
Add this to your middleware to log errors to the Apache error log when running under mod_wsgi.
- middleware
- apache
- errors
- modwsgi
- exceptions
UnicodeWriter and UnicodeDictWriter - write unicode strings out to Excel compatible CSV files
Exporting unicode data to Excel in a CSV file is surprisingly difficult. After much experimentation, it turns out the magic combination is UTF-16, a byte order mark and tab-delimiters. This snippet provides two classes - UnicodeWriter and UnicodeDictWriter - which can be used to output Excel-compatible CSV.
- unicode
- csv
- excel
baseconv.py - convert base 10 integers to base X and back again
Convert numbers from base 10 integers to base X strings and back again. Sample usage: >>> base20 = BaseConverter('0123456789abcdefghij') >>> base20.from_decimal(1234) '31e' >>> base20.to_decimal('31e') 1234
- base62
TextField
Alex Gaynor presented this idiom at EuroDjangoCon 2009.
- forms
- textfield
sort_by_id_sequence
I needed to sort a set of objects (a QuerySet for example) by an externally provided list of IDs - for example: >>> writers = Writer.objects.all() >>> sort_by_id_sequence(writers, [3, 1, 2]) [<Writer id: 3>, <Writer id: 1>, <Writer id: 2>]
- sorting
NoDoubleSlashes middleware
I needed this to work around a poorly configured redirecting service.
- middleware
- urls
DebugFooter middleware
Adds a hidden footer to the bottom of every text/html page containing a list of SQL queries executed and templates that were loaded (including their full filesystem path to help debug complex template loading scenarios). To use, drop in to a file called 'debug_middleware.py' on your Python path and add 'debug_middleware.DebugFooter' to your MIDDLEWARE_CLASSES setting.
- sql
- middleware
- debugging
multiblog - a simple example of row-level permissions in the admin
From my talk this morning at PyCon UK 2008: a very simple multiple user blog model with an admin interface configured to only allow people to edit or delete entries that they have created themselves, unless they are a super user.
- admin
- permissions
RequestFactory: Easily create mock request objects, for use in testing
Django's testing framework assumes you will be running your tests against "live" views that have been plugged in to your site's URL configuration - but sometimes you might want to run a test against a view function without first wiring it in to the rest of the site. This class makes it easy to do that by providing a "factory" for creating mock request objects, re-using the existing test Client interface (and most of the code). Once you've created a request object in your test you can use it to call your view functions directly, then run assertions against the response object that gets returned.
- testing
- httprequest
Converting PDT to UTC using pytz and dateutil
Every time I have to do this it takes me a solid half hour to figure it out, so I'm throwing it up here for future reference. I hate timezone calculations.
- utc
- pytz
- timezones
- pdt
Accepting and processing PayPal IPN messages (including using App Engine)
PayPal's [https://www.paypal.com/ipn](IPN mechanism) is ridiculously easy to consume. You can tell PayPal to POST every single transaction on your account to a URL somewhere, then set up a handler at that URL which processes those transactions in some way. Security is ensured by POSTing the incoming data back to PayPal for confirmation that the transaction is legitimate. These classes are probably over-engineered, but they were a fun experiment in creating class-based generic views.
- appengine
- paypal
- payment
- ipn