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Django Design Patterns and Best Practices

Django Design Patterns and Best Practices

By : Arun Ravindran
4.7 (7)
Buy this Book
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Django Design Patterns and Best Practices

Django Design Patterns and Best Practices

4.7 (7)
By: Arun Ravindran
Buy this Book

Overview of this book

If you want to learn how best to utilize commonly found patterns and learn best practices in developing applications with Django, this is the book for you. This book, like Django itself, is accessible to amateur and professional developers alike and assumes little in the way of prior experience. Although written for Python 3, the majority of the code in this book works in Python 2 or can be easily translated.
Table of Contents (14 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Django and Patterns
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1. Django and Patterns
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Why Django?
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The story of Django
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What is a Pattern?
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Patterns in this book
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Best practices
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Summary
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2. Application Design
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2. Application Design
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How to gather requirements
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Are you a story teller?
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HTML mockups
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Designing the application
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Before starting the project
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SuperBook – your mission, should you choose to accept it
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Summary
3
3. Models
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3. Models
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M is bigger than V and C
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The model hunt
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Structural patterns
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Retrieval patterns
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Migrations
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Summary
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4. Views and URLs
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4. Views and URLs
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A view from the top
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Class-based generic views
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View mixins
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Decorators
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View patterns
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Designing URLs
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Summary
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5. Templates
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5. Templates
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Understanding Django's template language features
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Organizing templates
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Using Bootstrap
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Template patterns
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Summary
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6. Admin Interface
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6. Admin Interface
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Using the admin interface
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Enhancing models for the admin
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Admin interface customizations
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Protecting the admin
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Summary
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7. Forms
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7. Forms
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How forms work
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Displaying forms
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Understanding CSRF
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Form processing with Class-based views
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Form patterns
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Summary
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8. Dealing with Legacy Code
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8. Dealing with Legacy Code
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Finding the Django version
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Where are the files? This is not PHP
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Starting with urls.py
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Jumping around the code
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Understanding the code base
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Incremental change or a full rewrite?
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Write tests before making any changes
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Legacy databases
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Summary
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9. Testing and Debugging
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9. Testing and Debugging
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Why write tests?
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Test-driven development
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Writing a test case
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Mocking
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Pattern – test fixtures and factories
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Learning more about testing
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Debugging
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The print function
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Logging
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The Django Debug Toolbar
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The Python debugger pdb
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Other debuggers
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Debugging Django templates
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Summary
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10. Security
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10. Security
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Cross-site scripting (XSS)
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A handy security checklist
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Summary
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11. Production-ready
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11. Production-ready
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Production environment
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Hosting
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Deployment tools
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Monitoring
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Performance
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Summary
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A. Python 2 versus Python 3
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A. Python 2 versus Python 3
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But I still use Python 2.7!
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Python 3
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Further information
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Index
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Index

Patterns in this book

This book will cover Django-specific design and architecture patterns, which would be useful to a Django developer. The upcoming sections will describe how each pattern will be presented.

Pattern name

The heading is the pattern name. If it is a well-known pattern, the commonly used name is used; otherwise, a terse, self-descriptive name has been chosen. Names are important, as they help in building the pattern vocabulary. All patterns will have the following parts:

Problem: This briefly mentions the problem.

Solution: This summarizes the proposed solution(s).

Problem Details: This elaborates the context of the problem and possibly gives an example.

Solution Details: This explains the solution(s) in general terms and provides a sample Django implementation.

Criticism of Patterns

Despite their near universal usage, Patterns have their share of criticism too. The most common arguments against them are as follows:

  • Patterns compensate for the missing language features: Peter Norvig found that 16 of the 23 patterns in Design Patterns were 'invisible or simpler' in Lisp. Considering Python's introspective facilities and first-class functions, this might as well be the case for Python too.
  • Patterns repeat best practices: Many patterns are essentially formalizations of best practices such as separation of concerns and could seem redundant.
  • Patterns can lead to over-engineering: Implementing the pattern might be less efficient and excessive compared to a simpler solution.

How to use Patterns

While some of the previous criticisms are quite valid, they are based on how patterns are misused. Here is some advice that can help you understand how best to use design patterns:

  • Don't implement a pattern if your language supports a direct solution
  • Don't try to retro-fit everything in terms of patterns
  • Use a pattern only if it is the most elegant solution in your context
  • Don't be afraid to create new patterns
CONTINUE READING
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Tech Concepts
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Programming languages
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Django Design Patterns and Best Practices
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