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What's New in Django 1.3
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Andrew Godwin
May 25, 2011
Programming
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What's New in Django 1.3
A talk I gave at DJUGL in May of 2011
Andrew Godwin
May 25, 2011
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Transcript
Andrew Godwin http://www.flickr.com/photos/caroslines/1371200717/ What's new in Django 1.3?
Hi, I'm Andrew. Serial Python developer Django core committer Co-founder
of ep.io (Python hosting platform)
Django: A Very Brief History Initial release in 2005 1.0
released in 2008 1.3 released March 2011
1.3 was the "bugfix release" The plan: No major features,
quick release
1.3 was the "bugfix release" The plan: No major features,
quick release The result: 2 major features, 10 months
1.3 was the "bugfix release" The plan: No major features,
quick release The result: 2 major features, 10 months We'll get the next one out quicker...
New Features Class-based views Logging contrib.staticfiles unitttest2 on_delete TemplateResponse
Notable Changes CSRF on AJAX requests Less swearwords Translation/i18n improvements
No more mod_python No more XMLField render() shortcut
Class-Based Views Biggest change in 1.3 Not required for all
new views Designed to simplify common patterns
CBV: Before def object_detail( request, year, month, day, queryset, date_field,
month_format='%b', day_format='%d', object_id=None, slug=None, slug_field='slug', template_name=None, template_name_field=None, template_loader=loader, extra_context=None, context_processors=None, template_object_name='object', mimetype=None, allow_future=False ):
CBV: After class AccountDetail(DetailView): model = Account context_object_name = "account"
slug_field = "snail" def get_context_data(self, **kwargs): context = super(AccountDetail, self)\ .get_context_data(**kwargs) context['books'] = Book.objects.all() return context
CBV: Simple views too! class AccountDetail(TemplateView): template_name = "mytempl.html" def
get_context_data(self, **kwargs): return { "books": Book.objects.all(), "is_evil": True, }
Other uses Refactor common parts into superclasses Mixins for adding-on
functionality Mutate the input or output
Logging Now actually sensible, not just emails Uses standard Python
logging library Configured using the LOGGING setting
LOGGING = { 'version': 1, 'disable_existing_loggers': True, 'handlers': { 'console':{
'level': 'DEBUG', 'class': 'logging.StreamHandler', }, 'mail_admins': { 'level': 'ERROR', 'class': 'django.utils.log.AdminEmailHandler', } }, 'loggers': { 'django.request': { 'handlers': ['mail_admins'], 'level': 'ERROR', }, 'myproject.custom': { 'handlers': ['console', 'mail_admins'], 'level': 'INFO', } } }
staticfiles Lets apps ship with their static files View to
serve them in development ./manage.py collectstatic for production
unittest2 Better than unittest (obviously) Many new assertion methods Test
skipping Expected failures Much more...
unittest2 Bundled with Django Just change: import unittest from django.utils
import unittest to
on_delete Deleting rows just got better! Cascade delete (as before)
Set to NULL Raise ProtectedError Set to arbitary value
TemplateResponse A HTTPResponse class you can change Template only run
at end of middleware Change context, or even template
TemplateResponse Example from django.template.response \ import TemplateResponse def blog_index(request): return
TemplateResponse( request, 'entry_list.html', {'entries': Entry.objects.all()}, ) ... response.context_data['foo'] = 'bar'
CSRF on AJAX requests CSRF is a hard, hard problem
Flash plus 307 redirect = fail You'll have to start supplying CSRF tokens to your JavaScript
Less Swearwords Guaranteed, or your money back. Also gone: "asshat",
"asshead".
Translation / i18n Marking for ambiguous meanings Overrideable translations for
apps Deprecation of project-wide translations
No more mod_python It's dead, Jim. If you're still using
it, move to mod_wsgi or gunicorn now, please.
No more XMLField We're not really sure why it was
there in the first place.
render() shortcut Like render_to_response, but : Less characters to type
Uses RequestContext Handy for those not on CBV
How do you upgrade? Should be mostly seamless. You'll get
warnings for deprecated settings (e.g. DATABASE_NAME)
What's going to be in 1.4? We're not quite sure
yet. Possible: App refactor HTML5 doctype ORM changes
Future features GSOC should give us: Template engine refactor New
form rendering Schema alteration low-level API Composite fields
Thank you. Andrew Godwin @andrewgodwin
[email protected]