Django:
Under The Hood

Florian Demmer - www.floriandemmer.com

Amsterdam,  November 5th-7th 2015

Django Friends Meetup, 2015-12-01

What is it?

• Django conference with great core developer attendence
   
• Usually in November (only 2nd one this year)
   
• by the Dutch Django Association
   
• in Amsterdam

Jacob Kaplan-Moss

HTTP in Django *

• Pretty old code; Request/response; WSGI interface
• Django "middlewares": request/response hooks
• WSGI middlewares
  Tip: https://github.com/evansd/whitenoise
• requests have their own URL resolver!
• The future:
  http://channels.readthedocs.org/en/latest/

https://speakerdeck.com/jacobian/response-cycle-django-under-the-hood-2015

Ola Sitarska

Django Admin

• admin got new style (django-flat-theme)
• components:
  • AdminSite
  • ModelAdmin
  • ChangeList

Iacopo Spalletti

Django CMS & ORM

• on top of admin:
  • 1/3rd of code is admin related
• on top of orm
  • drafts are copies of complete data
• on top of urlconf
  • "apphooks" extend dynamically

https://www.nephila.it/talk/django-cmsduth.html#/

End of first day

Russel Keith-Magee

Keynote

• stepping down as Django Software Foundation president
   
• ~10 years with Django project
• a look back
• importance of mentoring and
  social aspects of large open source projects

Josh Smeaton

Expressions

• should make .extra() and .raw() obsolete
• DB backend independent
• better documentation in 1.8
• composable:
  Sum(F('talk') + F('hold')) + Sum('wrap'))
   

https://speakerdeck.com/jarshwah/expressions-no-speaker-notes

Amber Brown

Twisted & Django *

• hendrix - a WSGI runner
  Django support
  websocket support
• django-channels a good step forward
• Django with Twisted long term/futureproof
• greenlets are bad: https://goo.gl/3vLjDN

https://speakerdeck.com/hawkowl/django-and-twisted-django-under-the-hood-2015

James Aylett

(Static) Files in Django

• FileField and storage backends
• use the {% staticfiles %} tag
• use external tools for asset pipeline
  • avoid "not invented here"
  • fast moving frontend-world
     

http://www.slideshare.net/jaylett/django-files-a-short-talk

Florian Apolloner

Django security

• read https://djangoproject.com/security
• don't trust user input
• session management and auth
• XSS, CSRF
• ./manage.py check --deploy

Eric Holscher

Documentation systems

• https://readthedocs.org
• RST over MD for semantic meaning
  • "Check out :pep:`8`"
• Sphinx
  • writing extensions

https://speakerdeck.com/ericholscher/understanding-documentation-systems

The End?

Boat party!

 Workshops

Mikey Ariel

Documentation...

• docs are key component of software project
• content strategy:
  • who? what? when? where? why?
• devops for docs
  • unified toolchain for code and docs
  • continuous integration
  • iterative extension
• docs or it didn't happen!

Sprints

All the things

• official: http://www.djangounderthehood.com
• impressions: https://goo.gl/Xwg8CH
• videos: https://opbeat.com/events/duth/
• Reinout: http://reinout.vanrees.org/weblog/tags/djangocon.html

• me: http://www.floriandemmer.com
• my twitter: @fdemmer
• slides: https://slides.com/fdemmer

Django Friends - Vienna

• meetup: http://www.meetup.com/django-vienna/
• twitter: @DjangoVienna