Django 3 By Example: Build powerful and reliable Python web applications from scratch , Third Edition

Antonio Melé

€18.99 per month

4.3 (26 Ratings)

Paperback Mar 2020 568 pages 3rd Edition

Antonio Melé

€18.99 per month

4.3 (26 Ratings)

Paperback Mar 2020 568 pages 3rd Edition

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Django 3 By Example

Enhancing Your Blog with Advanced Features

In the preceding chapter, you created a basic blog application. Next, you will turn your application into a fully functional blog with the advanced functionalities that many blogs feature nowadays. You will implement the following features in your blog:

Sharing posts via email: When readers like an article, they might want to share it with somebody else. You will implement the functionality to share posts via email.
Adding comments to a post: Many people want to allow their audience to comment on posts and create discussions. You will let your readers add comments to your blog posts.
Tagging posts: Tags allow you to categorize content in a non-hierarchical manner, using simple keywords. You will implement a tagging system, which is a very popular feature for blogs.
Recommending similar posts: Once you have a classification method in place, such as a tagging system, you can use it to provide content recommendations...

Creating a comment system

You will build a comment system wherein users will be able to comment on posts. To build the comment system, you need to do the following:

Create a model to save comments
Create a form to submit comments and validate the input data
Add a view that processes the form and saves a new comment to the database
Edit the post detail template to display the list of comments and the form to add a new comment

Building a model

First, let's build a model to store comments. Open the models.py file of your blog application and add the following code:

class Comment(models.Model):
    post = models.ForeignKey(Post,
                             on_delete=models.CASCADE,
                             related_name='comments')
    name = models.CharField(max_length=80)
    email = models.EmailField()
    body = models.TextField()
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField...

Adding the tagging functionality

After implementing your comment system, you need to create a way to tag your posts. You will do this by integrating a third-party Django tagging application into your project. django-taggit is a reusable application that primarily offers you a Tag model and a manager to easily add tags to any model. You can take a look at its source code at https://github.com/jazzband/django-taggit.

First, you need to install django-taggit via pip by running the following command:

pip install django_taggit==1.2.0

Then, open the settings.py file of the mysite project and add taggit to your INSTALLED_APPS setting, as follows:

INSTALLED_APPS = [
    # ...
    'blog.apps.BlogConfig',
    'taggit',
]

Open the models.py file of your blog application and add the TaggableManager manager provided by django-taggit to the Post model using the following code:

from taggit.managers import TaggableManager
class Post(models.Model...

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Key benefits

Learn Django 3 by building real-world web applications from scratch in Python, using coding best practices
Integrate other technologies into your application with clear, step-by-step explanations and comprehensive example code
Implement advanced functionalities like a full-text search engine, a user activity stream, or a recommendation engine
Add real-time features with Django Channels and WebSockets

Description

If you want to learn the entire process of developing professional web applications with Python and Django, then this book is for you. In the process of building four professional Django projects, you will learn about Django 3 features, how to solve common web development problems, how to implement best practices, and how to successfully deploy your applications. In this book, you will build a blog application, a social image bookmarking website, an online shop, and an e-learning platform. Step-by-step guidance will teach you how to integrate popular technologies, enhance your applications with AJAX, create RESTful APIs, and set up a production environment for your Django projects. By the end of this book, you will have mastered Django 3 by building advanced web applications.

Who is this book for?

This book is intended for developers with Python knowledge who wish to learn Django in a pragmatic way. Perhaps you are completely new to Django, or you already know a little but you want to get the most out of it. This book will help you to master the most relevant areas of the framework by building practical projects from scratch. You need to have familiarity with programming concepts in order to read this book. Some previous knowledge of HTML and JavaScript is assumed.

What you will learn

Build real-world web applications
Learn Django essentials, including models, views, ORM, templates, URLs, forms, and authentication
Implement advanced features such as custom model fields, custom template tags, cache, middleware, localization, and more
Create complex functionalities, such as AJAX interactions, social authentication, a full-text search engine, a payment system, a CMS, a RESTful API, and more
Integrate other technologies, including Redis, Celery, RabbitMQ, PostgreSQL, and Channels, into your projects
Deploy Django projects in production using NGINX, uWSGI, and Daphne

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Safwan S. Jun 07, 2020

Django 3 By Example provides a thorough overview of core concepts and detailed instructions on how to apply them. It's a great resource to learn both the theory and practical application of the theory. After the reading the book, you should be able to create production apps that are ready to scale. I highlighly recommend the book. I find myself referring the book quite frequently as I create new web apps.

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krishnaveer May 16, 2020

Absolutely wonderful full if you are a beginning or mediator buy it .Trust me you will not regret 😉

Alex Sep 04, 2020

If you need to start getting results right now - get this book. Very practical examples. Great explanations. Everything just makes sense. I keep jumping backward and forwards between sections to look up how to do this and that for my side project. Highly recommend to everyone

John Pugh May 31, 2021

I like the way the book is laid out and explains complex subjects in an easyn to understand way.It has helped expand my knowledge of Django including a few specific things I had not come to terms with.

Kishan Oct 04, 2020

Good for beginners. Explained how things works . Easy to understand

Django 3 By Example: Build powerful and reliable Python web applications from scratch , Third Edition

What do you get with a Packt Subscription?

Django 3 By Example

Enhancing Your Blog with Advanced Features

Sharing posts by email

Creating forms with Django

Creating a comment system

Building a model

Adding the tagging functionality

Retrieving posts by similarity

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Django 3 By Example: Build powerful and reliable Python web applications from scratch , Third Edition

What do you get with a Packt Subscription?

Key benefits

Description

Who is this book for?

What you will learn

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