![URLConf
• URLs are matched via patterns and mapped
View functions/classes that create the output.
urlpatterns = patterns('',
url(r'^$',
TipListView.as_view(),
name='tip-list'),
url(r'^tips/(?P<slug>[-w]+)/$',
TipDetailView.as_view(),
name='tip-detail'),
)](https://image.slidesharecdn.com/djangointroductionugent-130311082929-phpapp01/85/Django-introduction-UGent-10-320.jpg)
![Overview
urlpatterns = patterns('',
url(r'^books/([w-]+)/$',
PublisherBookList.as_view(),
name='author-detail'),
)
class PublisherBookList(ListView):
template_name = 'books/books_by_publisher.html'
def get_queryset(self):
self.publisher = get_object_or_404(Publisher, name=self.args[0])
return Book.objects.filter(publisher=self.publisher)](https://image.slidesharecdn.com/djangointroductionugent-130311082929-phpapp01/85/Django-introduction-UGent-13-320.jpg)
![from django.db import models
class Publisher(models.Model):
name = models.CharField(max_length=30)
address = models.CharField(max_length=50)
city = models.CharField(max_length=60)
state_province = models.CharField(max_length=30)
country = models.CharField(max_length=50)
website = models.URLField()
class Meta:
ordering = ["-name"]
def __unicode__(self):
return self.name
class Book(models.Model):
title = models.CharField(max_length=100)
authors = models.ManyToManyField('Author')
publisher = models.ForeignKey(Publisher)
publication_date = models.DateField()](https://image.slidesharecdn.com/djangointroductionugent-130311082929-phpapp01/85/Django-introduction-UGent-16-320.jpg)
Django introduction @ UGent
- 1. Django introduction Kevin Van Wilder www.inuits.eu
- 2. Topics • What is Django? • Framework overview • Getting started
- 3. Who uses Django? • Pinterest • New York Times • Instagram • Washington Post • Openstack • The Guardian • Disqus • Mercedes Benz • Firefox • National Geographic • NASA • Discovery Channel • Bitbucket • Orange • The Onion • ...
- 4. What is Django? • Not a CMS! • Web application framework to create complex, dynamic and datadriven websites with emphasis on: – Loose coupling and tight cohesion – Less code – Quick development – DRY – Consistent
- 5. Features • Admin interface (CRUD) • Templating • Form handling • Internationalisation (i18n) • Sessions, User management, role-based permissions. • Object-Relational Mapping (ORM) • Testing Framework • Fantastic documentation
- 7. Models Views Templates Application Models Views Templates Application Site/Project Project Structure Settings Urls Templates
- 8. Model, View, Template • Model – Abstracts data by defining classes for them and stores them in relational tables • View – Takes a browser request and generates what the user gets to see • Template – Defines how the user will see the view
- 9. Framework
- 10. URLConf • URLs are matched via patterns and mapped View functions/classes that create the output. urlpatterns = patterns('', url(r'^$', TipListView.as_view(), name='tip-list'), url(r'^tips/(?P<slug>[-w]+)/$', TipDetailView.as_view(), name='tip-detail'), )
- 11. Views • Receives a request and generates a response • Interacts with: – Models – Templates – Caching • Mostly fits inside one of the following categories: – Show a list of objects – Show details of an object – Create/Update/Delete an object – Show objects by year, month, week, day...
- 12. Views (continued) • Just rendering text: – TemplateView • If that doesn’t float your boat: Mixins – SingleObjectMixin – FormMixin – ModelFormMixin – ...
- 13. Overview urlpatterns = patterns('', url(r'^books/([w-]+)/$', PublisherBookList.as_view(), name='author-detail'), ) class PublisherBookList(ListView): template_name = 'books/books_by_publisher.html' def get_queryset(self): self.publisher = get_object_or_404(Publisher, name=self.args[0]) return Book.objects.filter(publisher=self.publisher)
- 14. Templates {% extends "base_generic.html" %} {% block title %} {{ publisher.name }} {% endblock %} {% block content %} <h1>{{ publisher.name }}</h1> {% for book in object_list %} <h2> <a href="{{ book.get_absolute_url }}"> {{ book.title }} </a> </h2> {% endfor %} {% endblock %}
- 15. Models • Abstract representation of data • Database independent • Object oriented (methods, inheritance, etc)
- 16. from django.db import models class Publisher(models.Model): name = models.CharField(max_length=30) address = models.CharField(max_length=50) city = models.CharField(max_length=60) state_province = models.CharField(max_length=30) country = models.CharField(max_length=50) website = models.URLField() class Meta: ordering = ["-name"] def __unicode__(self): return self.name class Book(models.Model): title = models.CharField(max_length=100) authors = models.ManyToManyField('Author') publisher = models.ForeignKey(Publisher) publication_date = models.DateField()
- 17. Querying the ORM Book.objects.get(title=“On the Origin of Species”) SELECT * FROM books WHERE title = “On the Origin of species”;
- 18. Querying the ORM Books.objects .filter(genre=“drama”) .order_by(“-publish_date”) .annotate(author_count=Count(‘author’)) .only(“title”, “publish_date”, “genre”)
- 19. GETTING STARTED
- 20. Working on “Onderwijstips” # SETTING UP ENVIRONMENT $ mkvirtualenv onderwijstips # CHECKING OUT THE CODE $ git clone [email protected]:Portaal/site-onderwijstips.git $ cd site-onderwijstips $ git checkout develop # BUILDING $ ln –s buildout_dev.cfg buildout.cfg $ python bootstrap.py $ bin/buildout –vv # uses private github projects, requires permissions # STARTING DJANGO $ bin/django migrate $ bin/django runserver
- 21. Git Repository • Git Flow (http://nvie.com/posts/a-successful-git-branching-model/) – master • Always tagged with a version • To be deployed – develop • Next version currently in development – release/1.x.x • A release being prepared • Merges into master with tag 1.x.x
- 23. How are we deploying? • Configuration: – Apache2 + mod_wsgi – MySQL – Optimize only when necessary (varnish, memcache, ...) • Jenkins pipeline – Perform a buildout – Generate .deb file – Upload to Infrastructure Package Repository – Triggers a Puppet run
- 24. Onderwijstips • Three applications – Tips (front-end for users) – Editors (back-end for tip author) – Migration (plomino importer) • Features: – Haystack search indexing (django-haystack) – User authentication (django-cas) – MediaMosa Integration (django-mediamosa) – Tagging (django-taggit) – Ugent Theming (django-ugent) • Buildout (Thx Bert!) • Monitoring via Sentry • Database schema migration management via South
- 25. DEMO TIME!