Introduction to django
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This document provides an introduction and overview of the Django web framework. It discusses topics such as the MVC architectural pattern, Django's implementation of MTV instead of MVC, key features like the ORM and built-in web server, the Django architecture and design philosophies of loose coupling and DRY principles. The document also covers the project structure, settings configuration, and URL dispatcher in Django.
![URL Dispatcher
Root URL should be configured in settings.py
o ROOT_URLCONF = 'app.urls'
Syntax
– patterns(prefix,
(regular expression, Python callback function [, optional dictionary [, optional name]]) )
– Example:
– urlpatterns = patterns(' ', (r'^articles-year/$', 'mysite.news.views.articles_year'))
– Note:
o No need to add a leading slash (/articles-year)
o The 'r' in front of each regular expression string is optional but recommended. It
tells Python that a string is "raw" -- that nothing in the string should be escaped.
6/4/2015 12](https://image.slidesharecdn.com/introductiontodjango-150604072554-lva1-app6892/85/Introduction-to-django-12-320.jpg)
Introduction to django
- 2. Agenda • Life without Framework • MVC • About Django • Is it MVC or MTV?? • Features • Django Architecture • Django Philosophies • Project Structure • Django Settings • URL Dispatcher 6/4/2015 2
- 5. About Django • Django is a free and open source web application framework, written in Python, which follows the model–view– controller (MVC) architectural pattern. • It is maintained by the Django Software Foundation (DSF). 6/4/2015 5
- 6. Is it MVC or MTV?? • In Django it is called MTV rather than MVC. Model Model Template View View Controller Models Describes your data Views Controls what users sees Templates How user sees it Controller URL dispatcher 6/4/2015 6
- 7. Features Object Relational Mapper - ORM MVC (MTV) Architecture Built-in light weight Web Server Elegant URL design Database Migration 6/4/2015 7
- 9. Design Philosophies • Loose Coupling • Less Code • Quick Development • DRY 6/4/2015 9
- 11. Settings For Django • DEBUG True or False • DATABASES ENGINE postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.. etc • ROOT_URLCONF app.urls • MEDIA_ROOT directory that will hold user-uploaded files • MEDIA_URL To serve media files • STATIC_ROOT To any server static files css, js and admin UI files (can add more dirs. to STATICFILES_DIRS) • STATIC_URL To serve static files • TEMPLATE_DIRS Template directories 6/4/2015 11
- 12. URL Dispatcher Root URL should be configured in settings.py o ROOT_URLCONF = 'app.urls' Syntax – patterns(prefix, (regular expression, Python callback function [, optional dictionary [, optional name]]) ) – Example: – urlpatterns = patterns(' ', (r'^articles-year/$', 'mysite.news.views.articles_year')) – Note: o No need to add a leading slash (/articles-year) o The 'r' in front of each regular expression string is optional but recommended. It tells Python that a string is "raw" -- that nothing in the string should be escaped. 6/4/2015 12