Schnell performante Web-Applikationen entwickeln. Markus Zapke-Gründemann LinuxTag 2012

Transkript

1 Schnell performante Web-Applikationen entwickeln Markus Zapke-Gründemann LinuxTag 2012

2 Übersicht Vorstellung Was ist Django? Architektur Code Django Roadmap Entwicklungsprozess Django in Zahlen Django in freier Wildbahn Nützliche Django Apps

3 Markus Zapke-Gründemann Softwareentwickler seit 2001 Softwareentwicklung mit Python, Django und Mercurial Selbstständig seit 2008 Seit 2011 Geschäftsführer bei Inqbus

4 Was ist Django?

5 Django Reinhardt * Bildquelle:

6 Was ist Django? Web Application Framework In Python geschrieben Open Source Software (BSD Lizenz) Django Software Foundation Umfangreiche Dokumentation Große, freundliche Community

7 Was ist Django? Rapid Development Loose Coupling Wiederverwendbare Applikationen Don't Repeat Yourself (DRY) Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

8

9 Und natürlich Ponies!

10 Ponies?

11 Ponies?

12 Architektur

13 MTV

14

15 Webserver

16 Webserver

17 URLConf Webserver

18 Webserver URLConf Middleware

19 Webserver URLConf Middleware

20 Webserver URLConf Middleware View

21 Webserver URLConf Middleware View

22 Webserver URLConf Middleware View Model (ORM)

23 Webserver URLConf Middleware View Model (ORM)

24 Webserver URLConf Middleware View Model (ORM) Datenbank

25 Webserver URLConf Middleware View Model (ORM) Datenbank

26 Webserver URLConf Middleware View Model (ORM) Datenbank

27 Webserver URLConf Middleware View Model (ORM) Datenbank

28 Webserver URLConf Middleware View Model (ORM) Template Datenbank

29 Webserver URLConf Middleware View Model (ORM) Template Datenbank

30 Webserver URLConf Middleware View Model (ORM) Template Datenbank Tags & Filter

31 Webserver URLConf Middleware View Model (ORM) Template Datenbank Tags & Filter

32 Webserver URLConf Middleware View Model (ORM) Template Datenbank Tags & Filter

33 Webserver URLConf Middleware View Model (ORM) Template Datenbank Tags & Filter

34

35 Object Relational Mapper

36 Object Relational Mapper Admin

37 Object Relational Mapper Admin URLConf

38 Object Relational Mapper Admin URLConf Views

39 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter)

40 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions

41 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML)

42 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom)

43 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

44 Object Relational Mapper Formulare Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

45 Object Relational Mapper Admin Formulare Validation URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

46 Object Relational Mapper Admin URLConf Formulare Validation File Storage Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

47 Object Relational Mapper Admin URLConf Views Formulare Validation File Storage Authentifizierung Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

48 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Formulare Validation File Storage Authentifizierung Testing Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

49 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Formulare Validation File Storage Authentifizierung Testing Caching Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS)

50 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Formulare Validation File Storage Authentifizierung Testing Caching i18n & l10n Syndication (RSS, Atom) GeoDjango (GIS)

51 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) Formulare Validation File Storage Authentifizierung Testing Caching i18n & l10n Middleware GeoDjango (GIS)

52 Object Relational Mapper Admin URLConf Views Templates (Tags & Filter) Sessions Serializer (JSON, XML, YAML) Syndication (RSS, Atom) GeoDjango (GIS) Formulare Validation File Storage Authentifizierung Testing Caching i18n & l10n Middleware Security

53 Code

54

55 $ pip install django

56 $ pip install django $ django-admin.py startproject myproject

57 $ pip install django $ django-admin.py startproject myproject $ tree myproject myproject!"" manage.py #"" myproject!"" init.py!"" settings.py!"" urls.py #"" wsgi.py

58 $ cd myproject $ python manage.py runserver

59

60 $ python manage.py startapp pages

61 $ python manage.py startapp pages $ tree.!"" manage.py!"" myproject... #"" pages!"" init.py!"" models.py!"" tests.py #"" views.py

62 myproject/pages/models.py from django.db import models class Page(models.Model): title = models.charfield(u'titel', max_length=100) slug = models.slugfield(unique=true) body = models.textfield(u'inhalt') class Meta: verbose_name = u'seite' verbose_name_plural = u'seiten' def unicode (self): return self.title

63 myproject/pages/admin.py from django.contrib import admin from.models import Page class PageAdmin(admin.ModelAdmin): prepopulated_fields = {'slug': ['title']} admin.site.register(page, PageAdmin)

64 myproject/urls.py from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^admin/', include(admin.site.urls)), )

65 $ python manage.py syncdb $ python manage.py runserver

66

67

68

69 myproject/urls.py from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^admin/', include(admin.site.urls)), url(r'^', include('pages.urls')) ) myproject/pages/urls.py from django.conf.urls import patterns, include, url urlpatterns = patterns('pages.views', url(r'^(?p<slug>[-\w]+)/$', 'detail'), )

70 myproject/pages/views.py from django.shortcuts import get_object_or_404, render from.models import Page def detail(request, slug): page = get_object_or_404(page, slug=slug) context = {'object': page} return render(request, 'pages/detail.html', context)

71 myproject/templates/base.html <!doctype html> <body> <h1>my Website</h1> {% block content %}{% endblock %} </body> </html> myproject/pages/templates/pages/detail.html {% extends "base.html" %} {% block content %} <h2>{{ object.title }}</h2> <p>{{ object.body linebreaks }}</p> {% endblock %}

72

73 Django Roadmap Stabile API Minor Release alle neun Monate Klare Deprecation Timeline Ab Django 1.5 experimentelle Python 3.3 Unterstützung

74 Entwicklungsprozess

75 Deployment Templates anlegen Inhalte erstellen Views anlegen Models & Admin anlegen

76 Django in Zahlen

77 Django in Zahlen Besucher der Website pro Monat

78 Django in Zahlen Besucher der Website pro Monat Abonnenten der django-users Mailing Liste

79 Django in Zahlen Besucher der Website pro Monat Abonnenten der django-users Mailing Liste > Packages im Python Packaging Index (> 10%)

80 Django in Zahlen Besucher der Website pro Monat Abonnenten der django-users Mailing Liste > Packages im Python Packaging Index (> 10%) 33 Kern-Entwickler

81 Django in Zahlen Besucher der Website pro Monat Abonnenten der django-users Mailing Liste > Packages im Python Packaging Index (> 10%) 33 Kern-Entwickler > 65 Übersetzungen

82 Django in freier Wildbahn

83

84 ZDF - Die letzte Spur

85 ZDF - Die letzte Spur Washington Post

86 ZDF - Die letzte Spur Washington Post Rdio

87 ZDF - Die letzte Spur Washington Post Rdio Vodafone

88 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons

89 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel

90 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel VMWare

91 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel VMWare Disqus

92 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel VMWare Disqus Instagram

93 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel VMWare Disqus Instagram National Geographic

94 ZDF - Die letzte Spur Washington Post Rdio Vodafone Mozilla Add-Ons Discovery Channel VMWare Disqus Instagram National Geographic The New York Times

95 Nützliche Django Apps

96 Django Debug Toolbar

97 Django Debug Toolbar

98 Django Debug Toolbar

99 Schema and Data Migrations

100 Celery Distributed Task Queue

101 Modular Search

102 WSGI HTTP Server for UNIX

103

104 Fragen?