What's New in Django 1.3

A talk I gave at DJUGL in May of 2011

Transcript

1. Andrew Godwin http://www.flickr.com/photos/caroslines/1371200717/ What's new in Django 1.3?
2. Hi, I'm Andrew. Serial Python developer Django core committer Co-founder of ep.io (Python hosting platform)
3. Django: A Very Brief History Initial release in 2005 1.0 released in 2008 1.3 released March 2011
4. 1.3 was the "bugfix release" The plan: No major features, quick release
5. 1.3 was the "bugfix release" The plan: No major features, quick release The result: 2 major features, 10 months
6. 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...
7. New Features Class-based views Logging contrib.staticfiles unitttest2 on_delete TemplateResponse
8. Notable Changes CSRF on AJAX requests Less swearwords Translation/i18n improvements No more mod_python No more XMLField render() shortcut
9. Class-Based Views Biggest change in 1.3 Not required for all new views Designed to simplify common patterns
10. 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 ):
11. 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
12. 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, }
13. Other uses Refactor common parts into superclasses Mixins for adding-on functionality Mutate the input or output
14. Logging Now actually sensible, not just emails Uses standard Python logging library Configured using the LOGGING setting
15. 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', } } }
16. staticfiles Lets apps ship with their static files View to serve them in development ./manage.py collectstatic for production
17. unittest2 Better than unittest (obviously) Many new assertion methods Test skipping Expected failures Much more...
18. unittest2 Bundled with Django Just change: import unittest from django.utils import unittest to
19. on_delete Deleting rows just got better! Cascade delete (as before) Set to NULL Raise ProtectedError Set to arbitary value
20. TemplateResponse A HTTPResponse class you can change Template only run at end of middleware Change context, or even template
21. 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'
22. 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
23. Less Swearwords Guaranteed, or your money back. Also gone: "asshat", "asshead".
24. Translation / i18n Marking for ambiguous meanings Overrideable translations for apps Deprecation of project-wide translations
25. No more mod_python It's dead, Jim. If you're still using it, move to mod_wsgi or gunicorn now, please.
26. No more XMLField We're not really sure why it was there in the first place.
27. render() shortcut Like render_to_response, but : Less characters to type Uses RequestContext Handy for those not on CBV
28. How do you upgrade? Should be mostly seamless. You'll get warnings for deprecated settings (e.g. DATABASE_NAME)
29. What's going to be in 1.4? We're not quite sure yet. Possible: App refactor HTML5 doctype ORM changes
30. Future features GSOC should give us: Template engine refactor New form rendering Schema alteration low-level API Composite fields
31. Thank you. Andrew Godwin @andrewgodwin andrew@ep.io