Django

• Django is a Python-based web framework
• Commonly used by developers
• Instagram uses Django

How Django Really Works?

• Open Source
• Developed by Adrian Holovaty, Simon Willison, and Jacob Kaplan-Moss, at the Lawrence Journal-World newspaper
• Django is continually funded to be maintained, active and progressed.

• Django’s organization is managed by a non-profit, the DSF, with a miniscule budget.

Inroductions - Topics

Object-relational mapper

Define your data models entirely in Python. You get a rich, dynamic database-access API for free — but you can still write SQL if needed.

URLs and views

To design URLs for an application, you create a Python module called a URLconf. Like a table of contents for your app, it contains a simple mapping between URL patterns and your views.

from django.urls import path

from . import views

urlpatterns = [
    path('bands/', views.band_listing, name='band-list'),
    path('bands/<int:band_id>/', views.band_detail, name='band-detail'),
    path('bands/search/', views.band_search, name='band-search'),
]

Templates

• python has a library that renders forms as html

  from django import forms

  class BandContactForm(forms.Form): subject = forms.CharField(max_length=100) message = forms.CharField() sender = forms.EmailField() cc_myself = forms.BooleanField(required=False)

Forms

Django comes with a full-featured and secure authentication system. It handles user accounts, groups, permissions and cookie-based user sessions. This lets you easily build sites that allow users to create accounts and safely log in/out.

Admin

from django.contrib import admin from bands.models import Band, Member

class MemberAdmin(admin.ModelAdmin):
    """Customize the look of the auto-generated admin for the Member model"""
    list_display = ('name', 'instrument')
    list_filter = ('band',)

admin.site.register(Band)  # Use the default options
admin.site.register(Member, MemberAdmin)  # Use the customized options

Internationalization

Django offers full support for translating text into different languages, plus locale-specific formatting of dates, times, numbers, and time zones

Security

Django provides multiple protections against:

Clickjacking
Cross-site scripting
Cross Site Request Forgery (CSRF)
SQL injection
Remote code execution