Django - the first five years

The first five years Jacob Kaplan-Moss Google, December 16, 2008 http://jacobian.org/speaking/2008/first-five-years/

“ Good software takes ten years. Get used to it. — Joel Spolsky ” http://www.joelonsoftware.com/articles/fog0000000017.html

Halfway there! http://ﬂickr.com/photos/usonian/257403571/

Kansas

Merry Slickmas Events Latest Music Movies Food Nightlife Best bets Upcoming quot;A Benefit for Charley's Fingerquot; with The Dactyls / Naomi What? Charlie Downey is a baller. He's so badass that he broke his finger in two places when one of his shots got stuffed Today at 10:00pm The Jackpot Music Hall, $5 Today's events Search events Staph blogs O Caption! My Caption! The Dog and Pony Show Loafers of Mass Destruction 13 comments Hark! The Local Musicians Sing!: New Christmas albums from Sam Billen and Josh Atkinson Scene Stealers Sam Billen’s “Merry Christmas” and Josh Atkinson’s “Songs for Christmas” rank right up 'Synecdoche, New York' tackles life’s there with recent yuletide blessings from Sufjan Stevens and Low. Both albums strip away complexity with complexity

“ In the beginning there was Zope. Zope was a web application framework ... but it had some discontents who dared to call it quot;monolithicquot; and quot;unpythonicquot;. And behold, then there came Webware, and it was Modular.... But others rebelled ... and a Ton of frameworks appeared: Quixote ... SkunkWEB ... ” CherryPy ... and some thirteen others. — Mike Orr http://linuxgazette.net/113/orr.html

r36 cms/apps/polls/ r84 cms/core/validators.py r159 cms/core/paginator.py r327 cms/apps/auth/ r390 cms/core/urlresolvers.py r630 cms/core/sites.py

February 2004 circa r1000

cms/apps/polls/poll.py

>>> from cms.apps.polls.polls import Poll >>> p = Poll(4, quot;hiquot;, date(2004, 1, 1), ...) >>> p.save()

cms/apps/polls/polls.py

cms/apps/polls/dblayout.sql

httpd.conf

cms/conf/mrmustard/polls.py

cms/views/polls/polls.py

Data class Admin view Data-access function(s) Admin template Admin URLs

cms/datadescriptions/polls.py

./generate_code.py polls

apps/ polls.py sql/ polls.sql views/ admin/ polls.py templates/ admin/ polls/ change_list.html add_form.html change_form.html

cms/utilities/codegeneration/generation.py

cms/datadescriptions/polls.py

DO NOT EDIT THIS FILE MANUALLY. IT WAS GENERATED BY A PROGRAM. RE‐RUN THE CODE GENERATOR INSTEAD.

Seven months later... October 2004

cms/models/polls.py

PyCon 2005

class Poll(meta.Model):     fields = (         meta.SlugField('slug', 'slug', unique_for_month='pub_dat         meta.CharField('question', 'question', maxlength=255),         meta.DateTimeField('pub_date', 'date published'),         meta.DateTimeField('expire_date', 'expiration date'),         meta.ManyToManyField(core.Site),         meta.PositiveSmallIntegerField('choice_votes', 'choice v     )     db_table = polls     ordering = ('‐pub_date',)     get_latest_by = 'pub_date'

class Poll(meta.Model):     slug = meta.SlugField(unique_for_month='pub_date')     question = meta.CharField(maxlength=255)     pub_date = meta.DateTimeField('date published')     expire_date = meta.DateTimeField('expiration date')     sites = meta.ManyToManyField(core.Site)     choice_votes = meta.PositiveSmallIntegerField(default=1)     class META:         db_table = 'polls'         ordering = ('‐pub_date',)

“ I can't think of any other backwards-incompatible changes that we're planning before 1.0 (knock on wood). If this isn't the last one, though, it's at least the last major one. — Adrian, August 2005 ” http://www.djangoproject.com/weblog/2005/aug/25/modelsyntax/

Before: from django.models.polls import Poll After: from myapp.models import Poll

Before: ... magic! ... After: import datetime

Before: class Poll(meta.Model):     class META:         admin = meta.Admin(             list_display = ('title'),         ) After: class Poll(meta.Model):     class Admin         list_display = ('title')

Before: from django.models.polls import polls polls.get_list(slug__exact='slug') After: from polls.models import Poll Poll.objects.filter(slug='slug')

 339 files changed,  22290 insertions(+),  15656 deletions(‐)

“ After this merge, Django 1.0 can’t be far off. — Bill de hÓra ” http://www.dehora.net/journal/2006/04/django_magic_merging.html

“0.95”

django.newforms django.test

18 months

3,094 commits + branches

1,370 from the community

230 new AUTHORS

2,120 bugs fixed

 1,394 files changed,  28,3237 insertions(+),  97,036 deletions(‐)

40,000 lines of new documentation

4 new full committers

Unicode

GeoDjango

ModelForms

Autoescaping

Django on Jython (Thanks, Google!)

... and much more ... http://docs.djangoproject.com/en/dev/releases/1.0/

API stability & forwards-compatability http://docs.djangoproject.com/en/dev/misc/api-stability/

Formal release process http://docs.djangoproject.com/en/dev/internals/release-process/

What’s next?

Django 1.1 March 16, 2009

Django 1.1 Roadmap http://code.djangoproject.com/wiki/Version1.1Roadmap

ORM aggregation http://github.com/freakboy3742/django/tree/aggregation

>>> Book.objects.aggregate( ...     Avg('price'), ...     highest_price = Max('price')) {'price_avg': 45.0, 'highest_price': 82.80}

>>> Author.objects.aggregate(Sum('book__price')) {'book_price_sum': 442}

>>> books = Book.objects.annotate(Max('authors__age')) >>> books[0].name u'Python Web Development With Django' >>> books[0].authors.all() [<Author: Jeffrey Forcier >, <Author: Paul Bissex>,  <Author: Wesley J. Chun>] >>> books[0].authors__age__max 37.0

Publisher.objects.annotate(num_books=Count('book__id'))                   .filter(num_books__gt=1)                   .order_by('num_books')

Improved QuerySet.update()

>>> Person.objects.update(age=F('age')+1)

Model Validation http://code.djangoproject.com/ticket/6845

>>> p = Person.objects.get(...) >>> p.age = ‐7 >>> p.save(validate=True) Traceback (most recent call last):   File quot;<stdin>quot;, line 1, in <module> ValidationError: enter a number greater than 0.

Bulk admin actions http://code.google.com/p/django-batchadmin/

Class-based generic views

from django.views.generic import DetailView class PersonView(DetailView):     queryset = Person.objects.all()          def get_template(self, request):         return Template(...)

... and more ... http://code.djangoproject.com/wiki/Version1.1Roadmap

Please help! http://code.djangoproject.com/wiki/Version1.1Roadmap#how-you-can-help

Thank you! jacob@jacobian.org

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Django - the first five years

by Jacob Kaplan-Moss

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