Slides from my talk at Django-NYC.

1. What’s new in Django 1.2?
Jacob Kaplan-Moss

2. Databases/Models

3. GSo
C
Multiple databases
http://bit.ly/multi-db

4. # settings.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'mydb',
},
'other': {
'ENGINE': 'django.db.backends.sqlite3'
'NAME': '/path/to/db'
}
}

5. >>> MyModel.objects.all()
[...]
>>> MyModel.objects.using('other').all()
[...]
>>> instance = MyModel(...)
>>> instance.save(using='default')

6. C
om
in
# yourapp/routers.py
g
so
class MasterSlaveRouter(object):
on
def db_for_read(model, instance=None):
!
return random.choice(['slave1', 'slave2'])
def db_for_write(model, instance=None):
return 'master'
# settings.py
DATABASE_ROUTERS = ['path.to.MasterSlaveRouter']

7. Raw queries
http://bit.ly/raw-sql

8. >>> Person.objects.raw('SELECT * FROM authors')
[<Person: Phillip Roth>, <Person: Robert A. Wilson>, ...]
>>> Person.objects.raw('SELECT id, first_name, "Joe" AS last_name FROM authors')
[<Person: Joe Roth>, <Person: Joe A. Wilson>, ...]
>>> people = Person.objects.raw('SELECT *, age(birth_date) AS age FROM authors')
>>> for p in people:
... print "%s is %s." % (p.first_name, p.age)
Phillip is 78.
Robert is 102.
...

9. GSo
C
Validators
http://bit.ly/validators

10. from django.core.exceptions import ValidationError
def is_even(value):
if value % 2 != 0:
raise ValidationError("%s is not an even number." % value)
...
class MyModel(models.Model):
even = models.IntegerField(validators=[is_even])
...
class MyForm(forms.Form):
even = forms.IntegerField(validators=[is_even])

11. Template
improvements

12. Improved CSRF protection
http://bit.ly/django-csrf

13. {% if x > y %}
{% if x|lower = 'q' %}
{% if x.y.z in list %}

14. Cached template loading
http://bit.ly/template-loaders

15. New in django.contrib

16. User messaging
http://bit.ly/django-messages

17. from django.contrib import messages
def my_view(request):
messages.success(request, "It worked!")
messages.error(request, "FAIL")
# Also debug, info, and wanrning
...
{% if messages %}
<ul class="messages">
{% for message in messages %}
<li class="{{ message.tags }}">{{ message }}</li>
{% endfor %}
</ul>
{% endif %}

18. Testing improvements

19. ~40% faster

20. Natural keys in fixtures
http://bit.ly/natural-keys

21. ./manage.py test --failfast

22. Et cetera
http://bit.ly/django-12

23. Et cetera
http://bit.ly/django-12
• Python 2.4+

24. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends

25. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()

26. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners

27. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb

28. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb
• Read-only fields in the admin

29. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb
• Read-only fields in the admin
• BigIntegerField

30. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb
• Read-only fields in the admin
• BigIntegerField
• Localization improvements

31. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb
• Read-only fields in the admin
• BigIntegerField
• Localization improvements
• Hooks for row-level permissions

32. Et cetera
http://bit.ly/django-12
• Python 2.4+
• Email backends
• QuerySet.exists()
• Class-based test runners
• Improvements to GeoDjango’s inspectdb
• Read-only fields in the admin
• BigIntegerField
• Localization improvements
• Hooks for row-level permissions
• Real models for automatic many-to-many tables

33. When?

34. When?
• January 26: Django 1.2 beta.

35. When?
• January 26: Django 1.2 beta.
• March 2: Django 1.2 release candidate.

36. When?
• January 26: Django 1.2 beta.
• March 2: Django 1.2 release candidate.
• March 9: Django 1.2 final.

37. Questions?
Me: Jacob Kaplan-Moss
Email: jacob@jacobian.org
Twitter: @jacobian