Introduction to Django

Django Webmardi - 03.04.2012 @brutasse

$ whoami

“Django is a high-level Python Web framework that encourages rapid
development and clean, pragmatic design”

Théorie

Real-world app: Cheese catalog Like / dislike cheeses Twitter authentication

$ pip install Django http://www.pip-installer.org

$ django-admin.py startproject webmardi webmardi/ ├── manage.py └── webmardi ├──
__init__.py ├── settings.py ├── urls.py └── wsgi.py

manage.py Project toolbox

$ python manage.py startpapp cheese cheese/ ├── __init__.py ├── models.py
├── tests.py └── views.py

Models ORM

from django.db import models from ..users.models import User class Cheese(models.Model):
name = models.CharField(max_length=255) image = models.ImageField(upload_to='cheese') description = models.TextField() class Taste(models.Model): cheese = models.ForeignKey(Cheese, related_name='tastes') user = models.ForeignKey(User) like = models.BooleanField(default=True) class Meta: unique_together = ('cheese', 'user')

Admin Customizable edition interface

from django.contrib import admin from .models import Cheese, Taste class
CheeseAdmin(admin.ModelAdmin): list_display = ('name', 'image') class TasteAdmin(admin.ModelAdmin): list_display = ('cheese', 'user', 'like') admin.site.register(Cheese, CheeseAdmin) admin.site.register(Taste, TasteAdmin)

Views Request handling

from django.template.response import TemplateResponse from .models import Cheese, Taste def
cheese_list(request): context = { 'cheeses': Cheese.objects.all(), } return TemplateResponse(request, 'cheese_list.html', context)

URLs HTTP routing

from django.conf.urls import patterns, url from . import views urlpatterns
= patterns('', url(r'^$', views.cheese_list, name='cheese_list'), url(r'^cheese/(?P<pk>\d+)/$', views.cheese_detail, name='cheese_detail'), url(r'^cheese/(?P<pk>\d+)/like/$', views.like_cheese, name='like_cheese'), url(r'^cheese/(?P<pk>\d+)/dislike/$', views.dislike_cheese, name='dislike_cheese'), url(r'^cheese/add/$', views.add_cheese, name='add_cheese'), )

Templates

<html> <head> <title>{% block title %}{% endblock
%}</title> </head> <body> {% block content %}{% endblock %} </body> </html>

{% extends "base.html" %} {% load thumbnail
markup %} {% block title %}Cheese types{% endblock %} {% block content %} {% for cheese in cheeses %} <h2>{{ cheese.name }}</h2> <img src="{% thumbnail cheese.image 300x300 crop %}"> {{ cheese.description|markdown }} {% endfor %} {% endblock %}

Tests Untested code is by definition broken

from django.core.urlresolvers import reverse from django.test import TestCase class CheeseTest(TestCase):
def test_home(self): url = reverse('cheese_list') response = self.client.get(url) self.assertContains(response, 'Cheese')

Forms Input validation / sanitization <form> rendering

from django import forms from .models import Cheese class CheeseForm(forms.ModelForm):
class Meta: model = Cheese

GIS Cryptographic signing Browser testing i18n Flash messages Atom/RSS Email
Cache Storage Logging Unicode Comments

Search Error reporting HTML5 forms Database migrations CMS REST API
Background tasks Debugging There's an app for that

Questions‽ Thanks @liip Code: https://github.com/brutasse/webmardi Slides: http://speakerdeck.com/u/brutasse

Introduction to Django

Introduction to Django

Bruno Renié

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Transcript

Django Webmardi - 03.04.2012 @brutasse

$ whoami

“Django is a high-level Python Web framework that encourages rapid

Théorie

Real-world app: Cheese catalog Like / dislike cheeses Twitter authentication

$ pip install Django http://www.pip-installer.org

$ django-admin.py startproject webmardi webmardi/ ├── manage.py └── webmardi ├──

manage.py Project toolbox

$ python manage.py startpapp cheese cheese/ ├── init.py ├── models.py

Models ORM

from django.db import models from ..users.models import User class Cheese(models.Model):

Admin Customizable edition interface

from django.contrib import admin from .models import Cheese, Taste class

Views Request handling

from django.template.response import TemplateResponse from .models import Cheese, Taste def

URLs HTTP routing

from django.conf.urls import patterns, url from . import views urlpatterns

Templates

<html> <head> <title>{% block title %}{% endblock

{% extends "base.html" %} {% load thumbnail

Tests Untested code is by definition broken

from django.core.urlresolvers import reverse from django.test import TestCase class CheeseTest(TestCase):

Forms Input validation / sanitization <form> rendering

from django import forms from .models import Cheese class CheeseForm(forms.ModelForm):

GIS Cryptographic signing Browser testing i18n Flash messages Atom/RSS Email

Search Error reporting HTML5 forms Database migrations CMS REST API

Questions‽ Thanks @liip Code: https://github.com/brutasse/webmardi Slides: http://speakerdeck.com/u/brutasse