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Django Design Patterns and Best Practices

You're reading from   Django Design Patterns and Best Practices Industry-standard web development techniques and solutions using Python

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Product type Paperback
Published in May 2018
Publisher Packt
ISBN-13 9781788831345
Length 282 pages
Edition 2nd Edition
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Author (1):
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Arun Ravindran Arun Ravindran
Author Profile Icon Arun Ravindran
Arun Ravindran
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Table of Contents (16) Chapters Close

Preface 1. Django and Patterns 2. Application Design FREE CHAPTER 3. Models 4. Views and URLs 5. Templates 6. Admin Interface 7. Forms 8. Working Asynchronously 9. Creating APIs 10. Dealing with Legacy Code 11. Testing and Debugging 12. Security 13. Production-Ready 14. Python 2 Versus Python 3 15. Other Books You May Enjoy

Why asynchronous?


Like most WSGI-based web frameworks, Django is synchronous. When a client requests a web page, the request reaches Django through a view and passes through various lines of code until the rendered web page is returned. As this communication waits or blocks until the process executes all this code, it is termed as synchronous.

New Django developers do not worry about creating asynchronous tasks, but I've noticed that their code eventually accumulates slow blocking tasks, such as image processing or even complex database queries, which leads to unbearably slow page loads. Ideally, they must be moved out of the request-response cycle. Page loading time is critical to user experience, and it must be optimized to avoid any delays.

Another fundamental problem of this synchronous model is the handling of events that are not triggered by web requests. Even if a website does not have any visitors, it must attend to various maintenance activities. They can be scheduled at a particular...

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