Django 1.6: The best new features & the important changes

DJANGO 1.6:
DJANGO 1.6:
THE BEST NEW FEATURES
THE BEST NEW FEATURES
& THE IMPORTANT CHANGES
& THE IMPORTANT CHANGES
presented by Julien Phalip ( )
@julienphalip
SF Django Meetup — July 25th, 2013

View Slide

WHO'S THAT?
WHO'S THAT?
Julien Phalip ( )
Technical director at
(Previously known as Odopod)
Using Django since 2007 (ver 0.96)
Django core committer since 2011
@julienphalip
Nurun SF

View Slide

THE ROAD TO DJANGO 1.6...
THE ROAD TO DJANGO 1.6...

View Slide

TIMELINE
TIMELINE
Version Date Time since previous release
1.0 Sep 3, 2008 —
1.1 Jul 29, 2009 11 months
1.2 May 17, 2010 9.5 months
1.3 Mar 23, 2011 10 months
1.4 Mar 23, 2012 12 months
1.5 Feb 26, 2013 11 months
1.6 Late Aug, 2013 6 months

View Slide

THE FLAGSHIP
THE FLAGSHIP
NEW FEATURES
NEW FEATURES

View Slide

PYTHON 3 SUPPORT
PYTHON 3 SUPPORT
Experimental since Django 1.5.
Now officially supported, without restrictions.
New Python.org will run on Django and Python 3.
( )
http://preview.python.org/

View Slide

PORTING YOUR APPS TO PYTHON 3
PORTING YOUR APPS TO PYTHON 3
Guide in official documentation:
Jacob Kaplan-Moss' Pycon talk:
http://tinyurl.com/django-python3
http://tinyurl.com/jkm-pycon-python3

View Slide

BETTER TRANSACTION
BETTER TRANSACTION
MANAGEMENT
MANAGEMENT
The old API had barely changed since 0.9x and was
frustrating to work with.
New API is leaner, simpler, more explicit, more correct.
Easier, fine-grained rollbacks between savepoints.
Easier error management.

View Slide

WARNING:
WARNING:
BACKWARDS INCOMPATIBLE
BACKWARDS INCOMPATIBLE
Database-level a
u
t
o
c
o
m
m
i
t is now turned on by default:
Every SQL statement gets committed right away.
Detailed upgrading instructions:
For more details, see Aymeric Augustin's DjangoCon
Europe talk:
http://tinyurl.com/transactions-upgrade
http://tinyurl.com/djangocon-eu-transactions

View Slide

NEW HIGH-LEVEL 'ATOMIC' FUNCTION
NEW HIGH-LEVEL 'ATOMIC' FUNCTION
t
r
a
n
s
a
c
t
i
o
n
.
a
t
o
m
i
c
:
Commits on success, rolls back on exceptions.
Inspired from
http://tinyurl.com/django-atomic
https://github.com/Xof/xact

View Slide

Can be used as decorator:
Can be used as context manager:
Can be nested.
f
r
o
m d
j
a
n
g
o
.
d
b i
m
p
o
r
t t
r
a
n
s
a
c
t
i
o
n
@
t
r
a
n
s
a
c
t
i
o
n
.
a
t
o
m
i
c
d
e
f v
i
e
w
f
u
n
c
(
r
e
q
u
e
s
t
)
:
# T
h
i
s c
o
d
e e
x
e
c
u
t
e
s i
n
s
i
d
e a t
r
a
n
s
a
c
t
i
o
n
.
d
o
_
s
t
u
f
f
(
)
f
r
o
m d
j
a
n
g
o
.
d
b i
m
p
o
r
t t
r
a
n
s
a
c
t
i
o
n
d
e
f v
i
e
w
f
u
n
c
(
r
e
q
u
e
s
t
)
:
# T
h
i
s c
o
d
e e
x
e
c
u
t
e
s i
n a
u
t
o
c
o
m
m
i
t m
o
d
e
# (
D
j
a
n
g
o
'
s d
e
f
a
u
l
t
)
.
d
o
_
s
t
u
f
f
(
)
w
i
t
h t
r
a
n
s
a
c
t
i
o
n
.
a
t
o
m
i
c
(
)
:
# T
h
i
s c
o
d
e e
x
e
c
u
t
e
s i
n
s
i
d
e a t
r
a
n
s
a
c
t
i
o
n
.
d
o
_
m
o
r
e
_
s
t
u
f
f
(
)

View Slide

PERSISTENT DATABASE
PERSISTENT DATABASE
CONNECTIONS
CONNECTIONS
Before: New connection opened for each HTTP request.
Now: Same connection reused between requests.
One connection per worker thread.
New setting: C
O
N
N
_
M
A
X
_
A
G
E (defaults to 0
, i.e. turned off
by default)
Not as powerful as or ...
... but should still drastically improve performance
(See Craig Kerstiens' blog post:
)
Caveat: Not extensively tested in production yet...
PgBouncer PgPool
http://tinyurl.com/fixing-connections

View Slide

NEW TEST RUNNER
NEW TEST RUNNER
More in line with u
n
i
t
t
e
s
t and Python standards.
Saner test discovery system.

View Slide

MORE FLEXIBILITY
MORE FLEXIBILITY
FOR RUNNING TESTS
FOR RUNNING TESTS
Before: Run all tests in an app, all tests in a certain
T
e
s
t
C
a
s
e or one test method.
Now: Run all tests within a certain directory (recursively),
all tests in a certain test file, or all tests in a certain
T
e
s
t
C
a
s
e
, or a particular test method.

View Slide

NO MORE OF THIS!
NO MORE OF THIS!
m
y
a
p
p
/
t
e
s
t
s
/
_
_
i
n
i
t
_
_
.
p
y
:
f
r
o
m a
a
a
a
a
a
a i
m
p
o
r
t *
f
r
o
m b
b
b
b
b
b
b
b
b i
m
p
o
r
t *
f
r
o
m c
c
c
c i
m
p
o
r
t *
f
r
o
m d
d
d
d
d
d
d i
m
p
o
r
t *
f
r
o
m e
e
e
e
e
e i
m
p
o
r
t *
f
r
o
m f
f
f i
m
p
o
r
t *

View Slide

MORE EXPLICIT
MORE EXPLICIT
Only run the tests you care about.
Avoid running tests for third-party code (django.contrib,
pip-installed apps).

View Slide

CAVEATS
CAVEATS
Tests in m
o
d
e
l
s
.
p
y must be moved to a t
e
s
t
*
.
p
y file.
Doctests must be explicitly loaded:
New runner enabled by default.
To revert to the old behavior:
http://tinyurl.com/load-doctests
T
E
S
T
_
R
U
N
N
E
R = '
d
j
a
n
g
o
.
t
e
s
t
.
s
i
m
p
l
e
.
D
j
a
n
g
o
T
e
s
t
S
u
i
t
e
R
u
n
n
e
r
'

View Slide

OTHER NEW FEATURES
OTHER NEW FEATURES
Pillow preferred over PIL
Q
u
e
r
y
s
e
t
.
e
a
r
l
i
e
s
t
(
)
, .
f
i
r
s
t
(
) and .
l
a
s
t
(
)
Database lookups by hour, minute, second
BinaryField
M
o
d
e
l
A
d
m
i
n
.
p
r
e
s
e
r
v
e
_
f
i
l
t
e
r
s
HTML5 types for input fields (email, url, number)
Admin's jQuery upgraded to 1.9.1
Multiple documentation improvements, including a
And many, many small features...
Many bug fixes...
deployment checklist

View Slide

BACKWARDS-INCOMPATIBLE CHANGES
BACKWARDS-INCOMPATIBLE CHANGES
New transactions API:
New test runner enabled by default.
B
o
o
l
e
a
n
F
i
e
l
d now defaults N
o
n
e instead of F
a
l
s
e
.
Whole list:
Should be easy to upgrade for most people.
http://tinyurl.com/transactions-incompatible
http://tinyurl.com/django-1-6-incompatible

View Slide

REMOVED FROM DJANGO
REMOVED FROM DJANGO
Removed contrib apps: databrowse, markup & localflavor.
django.utils.text.truncate_words() and
django.utils.text.truncate_html_words() removed in favor of
the django.utils.text.Truncator class
Detailed list of past deprecations:
http://tinyurl.com/django-1-6-removed

View Slide

FURTHER NOTES
FURTHER NOTES
Support for Django 1.4 (security patches) probably
extended.
Python 2.6 still supported in Django 1.6 but probably
dropped in Django 1.7.

View Slide

HOW CAN YOU HELP?
HOW CAN YOU HELP?
Test your apps against the 1.6 beta release or the 1.6.x
branch on Github.
any regressions or bugs in new features.
Help triage in Trac.
Contribution guide:
Report
unreviewed tickets
http://tinyurl.com/django-contribute

View Slide

CREDITS
CREDITS
& for letting me pick their
brains while preparing this talk.
for inviting me and for running the SF Django
Meetup.
for kindly hosting this meetup.
Aymeric Augustin Carl Meyer
Rudy Mutter
IGT

View Slide

THANK YOU
THANK YOU
FOR LISTENING!
FOR LISTENING!
ANY QUESTIONS...?
ANY QUESTIONS...?
Get in touch: @julienphalip

View Slide

Django 1.6: The best new features & the important changes

Django 1.6: The best new features & the important changes

Julien Phalip

More Decks by Julien Phalip

Other Decks in Programming

Featured

Transcript