Book Image

Django Essentials

By : Samuel Dauzon
Book Image

Django Essentials

By: Samuel Dauzon

Overview of this book

<p>Django is a powerful Python web framework designed for rapid web application development. With the advent of frameworks such as Django, web developers have been forced to adopt MVC architectures and are encouraged to develop quality code. This quality allows several developers to work together easily and reduces the number of bugs due to human errors.</p> <p>Beginning with the basics of the Web and Django, the book explains the MVC pattern. It then moves on to explain the step-by-step installation of Python, PIP, and Django on Windows, Linux, and Mac OS. Furthermore, you will learn how to create templates, models, forms, and so on. After reading the book, you will be able to quickly create dynamic web applications with AJAX and an admin part.</p> <p>This book features a step-by-step approach that shows you how to program, create, and improve the quality of web applications using Django, with the help of Python.</p>

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Django Essentials
Samuel Dauzon
Jun, 2014 | 172 pages
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Table of Contents (20 chapters)
Django Essentials
Django Essentials
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Django's Position on the Web
Django's Position on the Web
From Web 1.0 to Web 2.0
What is Django?
The MVC framework
Why use Django?
Summary
2
Creating a Django Project
Creating a Django Project
Installing Python 3
Installing setuptools
Installing PIP
Installing Django
Starting your project with Django
Creating an application
Configuring the application
Summary
3
Hello World! with Django
Hello World! with Django
Routing in Django
Regular expressions
Creating our first URL
Creating our first view
Testing our application
Summary
4
Working with Templates
Working with Templates
Displaying Hello world! in a template
Injecting the data from the view to the template
Creating dynamic templates
Integrating variables in templates
Using filters
Creating DRY URLs
Extending the templates
Using static files in templates
Summary
5
Working with Models
Working with Models
Databases and Django
Migrations with South
Creating simple models
The relationship between the models
Extending models
The admin module
Advanced usage of models
Summary
6
Getting a Model's Data with Querysets
Getting a Model's Data with Querysets
The persisting model's data on the database
Getting data from the database
Using the get parameter
Saving the foreign key
Updating records in the database
Deleting a record
Getting linked records
Advanced usage of the queryset
Summary
7
Working with Django Forms
Working with Django Forms
Adding a developer without using Django forms
Adding a developer with Django forms
The form based on a model
Advanced usage of Django forms
Summary
8
Raising Your Productivity with CBV
Raising Your Productivity with CBV
The CreateView CBV
Working with ListView
The DetailView CBV
The UpdateView CBV
The DeleteView CBV
Going further by extending the CBV
Summary
9
Using Sessions
Using Sessions
Creating and getting session variables
About session security
Summary
10
The Authentication Module
The Authentication Module
How to use the authentication module
Adding a user
Login and logout pages
Restricting access to the connected members
Summary
11
Using AJAX with Django
Using AJAX with Django
Working with jQuery
jQuery basics
Working with AJAX in the task manager
Summary
12
Production with Django
Production with Django
Completing the development
Selecting the physical server
Selecting the server software
Selecting the server database
Deploying the Django website
Installing Django, South, Gunicorn, and psycopg2
Summary
Cheatsheet
Cheatsheet
The field types in models
The form fields
The template language
Index
Index

Advanced usage of models

We studied the basics of the models that allow us to create simple applications. Sometimes, it is necessary to define more complex structures.

Using two relationships for the same model

Sometimes, it is useful to store two foreign keys (or more) in a single model. For example, if we want two developers to work in parallel on the same task, we must use the related_name property in our models. For example, our Task model contains two relationships with the following lines:

developer1 = models.ForeignKey (Developer , verbose_name = "User" , related_name = "dev1" )
developer2 = models.ForeignKey (Developer , verbose_name = "User" , related_name = "dev2" )

Further in this book, we will not use these two relationships. To effectively follow this book, we must return to our previously defined Task model.

Note

Here, we define two developers on the same task. Best practices advise us to create a many-to-many relationship in the Task model. The thorough argument allows you to specify...

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