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  • Book Overview & Buying Django Design Patterns and Best Practices
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Django Design Patterns and Best Practices

Django Design Patterns and Best Practices

By : 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: 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
2
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
4
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
7
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
8
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

Debugging Django templates

Projects can have very complicated logic in their templates. Subtle bugs while creating a template can lead to hard-to-find bugs. We need to set TEMPLATE_DEBUG to True (in addition to DEBUG) in settings.py so that Django shows a better error page when there is an error in your templates.

There are several crude ways to debug templates, such as inserting the variable of interest, such as {{ variable }}, or if you want to dump all the variables, use the built-in debug tag like this (inside a conveniently clickable text area):

<textarea onclick="this.focus();this.select()" style="width: 100%;"> 
  {% filter force_escape %} 
    {% debug %} 
  {% endfilter %}
</textarea>

A better option is use the Django Debug Toolbar mentioned earlier. It not only tells you the values of the context variables but also shows the inheritance tree of your templates.

However, you might want to pause in the middle of a template to inspect the state (say, inside a loop). A debugger...

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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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