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Django a whirlwind tour
- 1. Django: A Whirlwind Tour Brad Montgomery Email: [email protected] Twitter: bkmontgomery Friday, November 2, 12
- 2. Django: Features • Python • ORM: Object-Relational Mapper • MVC-inspired (MVT) • Clean URLs • Huge Community • Worlds Best Documentation Friday, November 2, 12
- 3. Batteries Included aka: contrib apps • admin • auth • comments • gis • syndication (atom/rss feeds) • sitemaps Friday, November 2, 12
- 5. Community • 3rd-party, open source apps • django-registration • django-social-auth • django-taggit • django-gravatar2 • django-relationships Friday, November 2, 12
- 7. So, who’s actually using Django? Friday, November 2, 12
- 8. Disqus, Instagram, Pintrest, Mozilla, Rdio, Bitbucket, Work for Pie, GiantBomb, The Onion Friday, November 2, 12
- 9. Projects & Apps • Projects are a collection of applications • Settings • DB Connections • installed apps • Filesystem paths • Command-line tool: manage.py Friday, November 2, 12
- 10. Projects & Apps $ django-admin.py startproject sampleproject Friday, November 2, 12
- 11. Projects & Apps sampleproject/ !"" manage.py #"" sampleproject !"" __init__.py !"" settings.py !"" urls.py #"" wsgi.py Friday, November 2, 12
- 12. Projects & Apps $ python manage.py startapp blog Friday, November 2, 12
- 13. Projects & Apps sampleproject/ !"" blog !"" __init__.py !"" models.py !"" tests.py #"" views.py Friday, November 2, 12
- 14. Models from django.db import models from django.contrib.auth.models import User class Post(models.Model): author = models.ForeignKey(User) title = models.CharField(max_length=128) slug = models.SlugField(max_length=128, unique=True) content = models.TextField() published_on = models.DateTimeField(auto_now_add=True) sampleproject/blog/models.py Friday, November 2, 12
- 15. syncdb $ python manage.py syncdb Friday, November 2, 12
- 16. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 17. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 18. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 19. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 20. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 21. Views from django.shortcuts import render_to_response from django.template import RequestContext from models import Post def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 22. A base template <!DOCTYPE html> <html> <head> <title> {% block title %}{% endblock %} </title> </head> <body> {% block content %}{% endblock %} </body> </html> sampleproject/sampleproject/templates/base.html Friday, November 2, 12
- 23. A base template <!DOCTYPE html> <html> <head> <title> {% block title %}{% endblock %} </title> </head> <body> {% block content %}{% endblock %} </body> </html> sampleproject/sampleproject/templates/base.html Friday, November 2, 12
- 24. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 25. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 26. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 27. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 28. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 29. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 30. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 31. A post template {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 32. URL Conf’s • Tie it all together! • Route HTTP requests to views • May also capture values Friday, November 2, 12
- 33. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 34. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 35. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 36. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 37. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 38. Root URLConf from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 39. An HTTP Request Friday, November 2, 12
- 40. An HTTP Request Friday, November 2, 12
- 41. An HTTP Request blog/sample-title/ from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 42. An HTTP Request blog/sample-title/ from django.conf.urls import patterns, include, url from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', url(r'^blog/(?P<post_slug>.+)/$', 'blog.views.display_post', name='display_post'), url(r'^admin/', include(admin.site.urls)), ) sampleproject/sampleproject/urls.py Friday, November 2, 12
- 43. An HTTP Request sample-title def display_post(request, post_slug): post = Post.objects.get(slug=post_slug) template_data = {'post': post} template = "blog/post.html" return render_to_response( template, template_data, context_instance=RequestContext(request) ) sampleproject/blog/views.py Friday, November 2, 12
- 44. An HTTP Request {% extends "base.html" %} Sample Title {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 45. An HTTP Request {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} Lorem Ipsum... {% block content %} <h1>{{ post.title }}</h1> {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 46. An HTTP Request {% extends "base.html" %} {% block title %} {{ post.title }} {% endblock %} {% block content %} <h1>{{ post.title }}</h1> Nov 3, 2012 {{ post.content|urlize|linebreaks }} <p>Published on: {{ post.published_on|date:"M d, Y" }}</p> {% endblock %} sampleproject/blog/templates/blog/post.html Friday, November 2, 12
- 47. An HTTP Request Friday, November 2, 12
- 48. Friday, November 2, 12
- 49. A Typical Stack Linux Friday, November 2, 12
- 50. A Typical Stack PostgreSQL Linux Friday, November 2, 12
- 51. A Typical Stack Gunicorn + Django PostgreSQL Linux Friday, November 2, 12
- 52. A Typical Stack nginx Gunicorn + Django PostgreSQL Linux Friday, November 2, 12
- 53. A Typical Stack Varnish Memcached nginx RabbitMQ Gunicorn + Django Redis PostgreSQL Linux Friday, November 2, 12
- 54. Friday, November 2, 12
- 55. Enter: Heroku • Deploy & Scale in the Cloud • Provides on-demand App/DB servers • The Heroku Toolbelt • http://www.heroku.com/ Friday, November 2, 12
- 56. Deploying to Heroku Do a little bit of setup... $ heroku create Creating app-name... done, stack is cedar http://app-name.herokuapp.com/ | [email protected]:app-name.git Git remote heroku added Friday, November 2, 12
- 57. Deploying to Heroku $ git push heroku master ... lots of output ... Friday, November 2, 12
- 58. Deploying to Heroku $ heroku run python manage.py syncdb ... your typical syncdb output ... Friday, November 2, 12
- 59. Deploying to Heroku Develop locally, then when you want to deploy, just run: $ git push heroku master Friday, November 2, 12
- 60. Want to Learn More? • Official Django Docs • https://docs.djangoproject.com • *Djangobook http://www.djangobook.com • Find Apps: http://www.djangopackages.com/ • Coming Soon: http://gettingstartedwithdjango.com/ Friday, November 2, 12
- 61. Q.E.D. Friday, November 2, 12