The year ahead (DjangoCon 2012)

BDFL keynote from DjangoCon US (Washington, DC), Sept. 5, 2012.

Transcript

10. The year ahead Adrian Holovaty DjangoCon 2012
11. • Alpha: Oct. 1 (feature freeze, branch created) • Beta: Nov. 1-ish • Release candidate 1: end of November • Release candidate 2: early December • Final: Christmas! Django 1.5 timeline
14. Separate localflavor packages django-localflavor-ar django-localflavor-at django-localflavor-au django-localflavor-be django-localflavor-br django-localflavor-ca django-localflavor-ch django-localflavor-cl django-localflavor-cn ...
15. • Django 1.5: Deprecation warning • Django 1.6: Separate (bundled) packages, shim in repo • Django 1.7: HTTP 410 (GONE) Deprecation policy
16. >>> from django.contrib import comments Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: What, you actually USE this monstrosity?!
17. >>> from django.contrib import databrowse Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: Sorry, it was a cool concept, but we never got around to finishing it.
18. >>> from django.conf import settings >>> settings.PROFANITIES_LIST Traceback (most recent call last): File "<stdin>", line 1, in <module> FrameworkPlea: Oh, God, please just let this setting die already.
19. >>> from django.conf import settings >>> settings.SEND_BROKEN_LINK_EMAILS = True Traceback (most recent call last): File "<stdin>", line 1, in <module> StupidSettingsError: C’mon.
20. >>> from django.conf import settings >>> settings.SEND_BROKEN_LINK_EMAILS = True Traceback (most recent call last): File "<stdin>", line 1, in <module> StupidSettingsError:
21. >>> from django.conf import settings >>> settings.AUTH_PROFILE_MODULE Traceback (most recent call last): File "<stdin>", line 1, in <module> ThatStinks: Code smell detected
22. class User(models.Model): username = models.CharField(max_length=30, unique=True) first_name = models.CharField(max_length=30, blank=True) last_name = models.CharField(max_length=30, blank=True) email = models.EmailField(blank=True) password = models.CharField(max_length=128) is_staff = models.BooleanField(default=False) is_active = models.BooleanField(default=True) is_superuser = models.BooleanField(default=False) last_login = models.DateTimeField(default=timezone.now) date_joined = models.DateTimeField(default=timezone.now) groups = models.ManyToManyField(Group) user_permissions = models.ManyToManyField(Permission)
23. In myapp/models.py from django.contrib.auth.models import User class UserProfile(models.Model): user = models.OneToOneField(User) # required # Other fields here favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20)
24. In myapp/models.py from django.contrib.auth.models import User class UserProfile(models.Model): user = models.OneToOneField(User) # required # Other fields here favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20) In settings.py AUTH_PROFILE_MODULE = 'myapp.UserProfile'
25. In myapp/models.py from django.contrib.auth.models import User class UserProfile(models.Model): user = models.OneToOneField(User) # required # Other fields here favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20) In settings.py AUTH_PROFILE_MODULE = 'myapp.UserProfile' In views.py request.user.get_profile()
26. In myapp/models.py class User(models.Model): username = models.CharField(max_length=100) password = models.CharField(max_length=128) favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20)
27. In myapp/models.py class User(models.Model): username = models.CharField(max_length=100) password = models.CharField(max_length=128) favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20) In settings.py USER_MODEL = 'myapp.User'
28. In myapp/models.py class User(models.Model): username = models.CharField(max_length=100) password = models.CharField(max_length=128) favorite_animal = models.CharField(max_length=20) favorite_beatle = models.CharField(max_length=20) In settings.py USER_MODEL = 'myapp.User' In views.py request.user
29. • Backwards compatible: fall back to old auth.User model • Any User model can work with the admin, using a clearly defined interface Design goals
30. ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined.
31. def mypage(request, slug): obj = MyModel.objects.get(slug=slug) return render(request, 'mypage.html', {'obj': obj})
32. def mypage(request, slug): obj = MyModel.objects.get(slug=slug) return render(request, 'mypage.html', {'obj': obj}) Connection info?
33. def mypage(request, slug): obj = MyModel.objects.get(slug=slug) return render(request, 'mypage.html', {'obj': obj}) Connection info? Template location?
34. def mypage(request, slug): obj = request.app.query(MyModel).get(slug=slug) return request.app.render('mypage.html', {'obj': obj})
35. def mypage(request, slug): obj = request.app.query(MyModel).get(slug=slug) return request.app.render('mypage.html', {'obj': obj}) app.query()
36. def mypage(request, slug): obj = request.app.query(MyModel).get(slug=slug) return request.app.render('mypage.html', {'obj': obj}) app.query() app.render()
37. def mypage(request, slug): obj = request.app.query(MyModel).get(slug=slug) return request.app.render('mypage.html', {'obj': obj}) from django import YetAnotherAppClass app = YetAnotherAppClass(settings={ 'DATABASES': '...', 'TEMPLATE_DIRS': ['/path/to/templates'], }, rootview=my_urls) app.runserver()
38. >>> from django import javascript_stuff Traceback (most recent call last): File "<stdin>", line 1, in <module> NotImplementedYet: But it’s about time.
39. PJAX (P = pushstate)
40. Web framework
41. Web framework returns full page Web framework returns full page
43. Web framework returns full page Web framework returns *diff* and changes URL
44. Overview
45. Overview Click link Trigger Ajax request
46. Overview Click link Trigger Ajax request Server says: “These bits changed”
47. Overview Click link Trigger Ajax request Server says: “These bits changed” JavaScript changes the page in place
48. Overview Click link Trigger Ajax request Server says: “These bits changed” JavaScript changes the page in place URL gets updated with pushstate
49. MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.pjax.middleware.PjaxMiddleware', )
50. http://tinyurl.com/pjaxvideo
51. Real-time
52. Content sites Applications # of sites
53. Content sites Applications # of sites
54. Content sites Applications # of sites Move this to the right
55. Thanks for using Django Love, Adrian