Django introduction workshop

Django introduction workshop, level: beginner

Transcript

1. Introductie
2. Agenda • Historie • Architectuur • Start project • Views • Modules (apps) • Admin • Models • Templates
3. Historie
4. Begonnen in 2003
5. Lawrence, KS
6. Lawrence Journal
7. Sinds 2005 open source
8. Django Reinhardt 1910-1953
11. >= 2.5
12. Google App Engine
13. “My personal favorite -- and I expect that that will remain a personal favorite for a long time -- is something named Django. ... I highly recommend it.” -- Guido van Rossum
14. Architectuur
15. MVC Framework
17. Key philosophies
18. Key philosophies • Loose coupling • Less code • Quick development • DRY • Explicit is better than implicit • Consistency
19. Project
20. git init GIT
21. virtualenv . Virtual environment opzetten
22. django-admin.py startproject [app] Start project
23. python [app]/manage.py runserver dev server starten
24. Profit! $$!
25. python manage.py startapp articles module maken
27. INSTALLED_APPS = ( 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'articles', # Uncomment the next line to enable the admin: # 'django.contrib.admin', # Uncomment the next line to enable admin documentation: # 'django.contrib.admindocs', ) app enablen settings.py
28. view maken views.py from django.http import HttpResponse def hello(request): return HttpResponse("Hello world")
29. from django.conf.urls.defaults import patterns, include, url # Uncomment the next two lines to enable the admin: # from django.contrib import admin # admin.autodiscover() urlpatterns = patterns('', # Examples: # url(r'^$', 'foobar.views.home', name='home'), # url(r'^foobar/', include('foobar.foo.urls')), # Uncomment the admin/doc line below to enable admin documentation: # url(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: # url(r'^admin/', include(admin.site.urls)), url(r'^$', 'articles.views.hello', name='home'), ) url toekennen urls.py
30. python [app]/manage.py runserver dev server starten
31. Admin
32. • admin app enablen • database settings toevoegen • urls aanpassen • superuser aanmaken
33. INSTALLED_APPS = ( 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'articles', # Uncomment the next line to enable the admin: 'django.contrib.admin', # Uncomment the next line to enable admin documentation: 'django.contrib.admindocs', ) admin app enablen settings.py
34. DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': 'example.sql', 'USER': '', 'PASSWORD': '', 'HOST': '', 'PORT': '', } } db settings settings.py
35. python manage.py syncdb db settings + user
36. from django.conf.urls.defaults import patterns, include, url # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', # Examples: # url(r'^$', 'foobar.views.home', name='home'), # url(r'^foobar/', include('foobar.foo.urls')), # Uncomment the admin/doc line below to enable admin documentation: url(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: url(r'^admin/', include(admin.site.urls)), url(r'^$', 'articles.views.hello', name='home'), ) url enablen urls.py
37. python [app]/manage.py runserver dev server starten
38. http://127.0.0.1:8000/admin admin openen
39. Models!
41. from django.db import models from datetime import * class Article(models.Model): created_at = models.DateTimeField(auto_now_add=True, default=datetime.now()) updated_at = models.DateTimeField(auto_now=True) publish_at = models.DateTimeField(default=datetime.now()) title = models.CharField(max_length=255) intro = models.TextField(null=False) body = models.TextField(null=False) article model models.py
42. python [app]/manage.py syncdb db syncen
43. from django.contrib import admin from app.articles.models import * admin.site.register(Article) toevoegen aan admin articles/admin.py
44. python [app]/manage.py runserver dev server starten
45. http://127.0.0.1:8000/admin admin openen
46. article aanmaken
47. Templates
48. view wijzigen views.py from django.http import HttpResponse from django.shortcuts import render_to_response from articles.models import * def hello(request): return HttpResponse("Hello world") def article(request,id): article = Article.objects.get(pk=id) return render_to_response( 'view.html', locals(), context_instance=RequestContext(request) )
49. from django.conf.urls.defaults import patterns, include, url # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', # Examples: # url(r'^$', 'foobar.views.home', name='home'), # url(r'^foobar/', include('foobar.foo.urls')), # Uncomment the admin/doc line below to enable admin documentation: url(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: url(r'^admin/', include(admin.site.urls)), url(r'^$', 'articles.views.hello', name='home'), url(r'^article/(?P<id>[0-9]+)$', 'articles.views.article', name='articleView'), ) url enablen urls.py
50. import os PROJECT_PATH = os.path.realpath(os.path.dirname(__file__)) TEMPLATE_DIRS = ( PROJECT_PATH + '/templates/', ) template path setten settings.py
51. <h1>{{article.title}}</h1> <p>{{article.intro}}</p> <p>{{article.body}}</p> template maken templates/view.html
52. http://127.0.0.1:8000/article/1 url openen
53. done!