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Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
Django at the Disco
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Django at the Disco

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An introduction to the Django Web framework and how it's used by the Discovery Creative team. …

An introduction to the Django Web framework and how it's used by the Discovery Creative team.

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  • 1. Django at the Disco An introduction to the Django Web framework and how it's used by the Discovery Creative team Rich Leland Discovery Creative @richleland richard_leland@discovery.com http://creative.discovery.com
  • 2. What is ? • Python Web framework • Originally developed for The World Company • Named after jazz guitarist Django Reinhardt • Released under BSD license in 2005
  • 3. Who’s using it? • NASA • PBS • Discovery • National Geographic • The New York Times • Broadway • WNYC • Google • LA Times • LexisNexis
  • 4. Example project structure myproject __init__.py manage.py settings.py urls.py myapp __init__.py admin.py models.py urls.py views.py static templates myproject
  • 5. Key Features • Object-relational mapper • Automatic admin interface • Elegant, Regex-based URL design • Template language • Cache system • Internationalization • Community
  • 6. Object-relational mapper from django.db import models class Network(models.Model): """ Represents a member of our family of Networks. """ visible = models.BooleanField(default=True) name = models.CharField(max_length=100) slug = models.SlugField(unique=True) large_logo = models.ImageField(upload_to='ugc/logos/lg/', blank=True) small_logo = models.ImageField(upload_to='ugc/logos/sm/', blank=True) link = models.URLField(verify_exists=False, blank=True) ... # in another file, e.g. views.py: from myapp.models import Network Network.objects.all() Network.objects.get(pk=5) Network.objects.filter(slug=”some-network”)
  • 7. Automatic admin interface class NetworkAdmin(admin.ModelAdmin): list_display = ('name', 'admin_logo', 'link', 'visible') list_filter = ('visible',) search_fields = ('name',) prepopulated_fields = { 'slug': ('name',) } admin.site.register(Network, NetworkAdmin)
  • 8. Elegant, RegEx-based URL design from django.conf.urls.defaults import * urlpatterns = patterns('', (r'^admin/doc/', include('django.contrib.admindocs.urls')), (r'^admin/(.*)', admin.site.root), # included url confs from other apps (r'^account/', include('registration.urls')), (r'^bookmarks/', include('bookmarks.urls')), (r'^messages/', include('mailer.urls')), # named url patterns pointing to a view url(r'^downloads/add/(?P<content_type_id>[d]+)/(?P<object_id>[d]+)/$', 'pressweb.media.views.add_download', name='add-download'), url(r'^$', 'pressweb.network.views.region_list', name='select-region-list'), )
  • 9. URL structure breakdown (r'^admin/doc/', include('django.contrib.admindocs.urls')), RegEx pattern include of another urls.py url(r'^networks/(?P<object_id>[d]+)/$', RegEx pattern view='myapp.views.network_detail', views.py name='add-download'), pattern name
  • 10. Template system {% extends "base.html" %} {% load i18n %} {% block title %}Bookmarks: {% endblock %} {% block bodyclass %}bookmarks wide{% endblock %} {% block bodyid %}{{ network.slug }}{% endblock %} {% block content %} {% if bookmarks %} <div class="list-view"> {% for bookmark in bookmarks %} <div class="item {% cycle 'odd' 'even' %}"> <div class="column1">{{ bookmark.created|date:"F j, Y" }}</div> <div class="column2">{{ bookmark.title }}</div> <div class="column3"><a href="{{ bookmark.url }}">Go to Page</a></ div> </div> {% endfor %} </div> {% endif %} {% endblock %}
  • 11. Template system {% extends "base.html" %} {% load i18n %} {% block title %}Bookmarks: {% endblock %} {% block bodyclass %}bookmarks wide{% endblock %} {% block bodyid %}{{ network.slug }}{% endblock %} {% block content %} {% if bookmarks %} <div class="list-view"> {% for bookmark in bookmarks %} <div class="item {% cycle 'odd' 'even' %}"> <div class="column1">{{ bookmark.created|date:"F j, Y" }}</div> <div class="column2">{{ bookmark.title }}</div> <div class="column3"><a href="{{ bookmark.url }}">Go to Page</a></ div> </div> {% endfor %} </div> {% endif %} {% endblock %}
  • 12. Cache system Site-wide cache MIDDLEWARE_CLASSES = ( 'django.middleware.cache.UpdateCacheMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.cache.FetchFromCacheMiddleware', ) Per-view cache @cache_page(60 * 15) def my_view(request): ...
  • 13. Cache system Template fragment caching {% load cache %} {% cache 500 sidebar %} .. sidebar .. {% endcache %} Low-level cache API from django.core.cache import cache cache.set('my_key', 'hello, world!', 30) cache.get('my_key')
  • 14. Internationalization i18n in templates {% trans "Bookmarks" %} {% blocktrans %}This object is called {{ obj.name }}{% endblocktrans %} i18n in modules from django.utils.translation import ugettext_lazy as _ class MyThing(models.Model): name = models.CharField(_('name'), help_text=_('This is the help text')) Create message files (.po), compile them (.mo) django-admin.py makemessages -l pt_BR django-admin.py compilemessages
  • 15. Contrib Apps • Authentication • Admin • Cache • Comments • CSRF • Email • i18n • Jython support • Serialization • Syndication • GIS (GeoDjango)
  • 16. Community • Core devs actively involved • Thousands of community-contributed apps • IRC: #django and #django-dev • Mailing lists: django-users and django-developers • Twitter: @djangotracker
  • 17. Discovery Creative • In-house ad agency for Discovery and family of networks • Established 1996 • 100 strong: design, dev, photo, copy, account services, motion, prepress, production • Web team established 2006 • 2 Django devs • 4 Designers/front-end devs • 2 Project managers • 1 QA manager • Located in Silver Spring & London • Service all networks and business units globally
  • 18. How we’re using Django • Rapid application development • Combination of B2B, B2C, in-house apps (directory) • Working with partners (Siemens, AFI/Silverdocs) • Saving the company money: 2007: $900k, 2008: $1.5M
  • 19. Learn more • docs.djangoproject.com • djangobook.com • djangosnippets.org • Practical Django Projects • Djangocon: Sept 8-12 in Portland • django-district.org
  • 20. Thank you! Rich Leland Discovery Creative @richleland richard_leland@discovery.com http://creative.discovery.com

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