Book Image

Mastering Django: Core

By : Nigel George
Book Image

Mastering Django: Core

By: Nigel George

Overview of this book

Mastering Django: Core is a completely revised and updated version of the original Django Book, written by Adrian Holovaty and Jacob Kaplan-Moss - the creators of Django. The main goal of this book is to make you a Django expert. By reading this book, you’ll learn the skills needed to develop powerful websites quickly, with code that is clean and easy to maintain. This book is also a programmer’s manual that provides complete coverage of the current Long Term Support (LTS) version of Django. For developers creating applications for commercial and business critical deployments, Mastering Django: Core provides a complete, up-to-date resource for Django 1.8LTS with a stable code-base, security fixes and support out to 2018.
Table of Contents (33 chapters)
Mastering Django: Core
Credits
About the Author
www.PacktPub.com
Preface
Free Chapter
1
Introduction to Django and Getting Started

Basic template-tags and filters


As we've mentioned already, the template system ships with built-in tags and filters. The sections that follow provide a rundown of the most common tags and filters.

Tags

if/else

The {% if %} tag evaluates a variable, and if that variable is True (that is, it exists, is not empty, and is not a false Boolean value), the system will display everything between {% if %} and {% endif %}, for example:

{% if today_is_weekend %} 
    <p>Welcome to the weekend!</p> 
{% endif %} 

An {% else %} tag is optional:

{% if today_is_weekend %} 
    <p>Welcome to the weekend!</p> 
{% else %} 
    <p>Get back to work.</p> 
{% endif %} 

The if tag may also take one or several {% elif %} clauses as well:

{% if athlete_list %} 
    Number of athletes: {{ athlete_list|length }} 
{% elif athlete_in_locker_room_list %} 
    <p>Athletes should be out of the locker room soon! </p> 
...