You are previewing Pro Django.

Pro Django

Cover of Pro Django by Marty Alchin Published by Apress
  1. Title Page
  2. Contents at a Glance
  3. Contents
  4. About the Author
  5. Acknowledgments
  6. Preface
  7. Introduction
    1. What This Book Is Not
    2. Who This Book Is For
    3. Interpreting Code Samples
    4. Prerequisites
  8. CHAPTER 1: Understanding Django
    1. Philosophy
    2. Community
    3. Now What?
  9. CHAPTER 2: Django Is Python
    1. How Python Builds Classes
    2. Common Duck-Typing Protocols
    3. Augmenting Functions
    4. Descriptors
    5. Introspection
    6. Applied Techniques
    7. Now What?
  10. CHAPTER 3: Models
    1. How Django Processes Model Classes
    2. Getting Information About Models
    3. Using Model Fields
    4. Subclassing Fields
    5. Dealing with Files
    6. Signals
    7. Applied Techniques
    8. Now What?
  11. CHAPTER 4: URLs and Views
    1. URLs
    2. Views
    3. Applied Techniques
    4. Now What?
  12. CHAPTER 5: Forms
    1. Declaring and Identifying Fields
    2. Binding to User Input
    3. Custom Fields
    4. Defining HTML Behavior
    5. Applied Techniques
    6. Now What?
  13. CHAPTER 6: Templates
    1. What Makes a Template
    2. Context
    3. Retrieving Templates
    4. Adding Features for Templates
    5. Applied Techniques
    6. Now What?
  14. CHAPTER 7: Handling HTTP
    1. Requests and Responses
    2. Writing HTTP Middleware
    3. HTTP-Related Signals
    4. Applied Techniques
    5. Now What?
  15. CHAPTER 8: Backend Protocols
    1. Database Access
    2. Authentication
    3. Files
    4. Session Management
    5. Caching
    6. Template Loading
    7. Context Processors
    8. Applied Techniques
    9. Now What?
  16. CHAPTER 9: Common Tools
    1. Core Exceptions
    2. Text Modification
    3. Data Structures
    4. Functional Utilities
    5. Signals
    6. Now What?
  17. CHAPTER 10: Coordinating Applications
    1. Contacts
    2. Real Estate Properties
    3. Now What?
  18. CHAPTER 11: Enhancing Applications
    1. Recording the Current User
    2. Keeping Historical Records
    3. Now What?
  19. APPENDIX: Contributing to Django
    1. Reporting a Ticket
    2. Supplying a Patch
    3. Writing Tests
    4. Writing Documentation
    5. Development Sprints
    6. Publishing Code
    7. Releasing an Application
  20. Index
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CHAPTER 5Forms

One of the key ingredients to modern Web applications is interactivity—the ability to accept input from users, which helps shape their experience. That input can be just about anything, from a simple search term to entire user-submitted novels. The key is the ability to process this input and turn it into a meaningful feature that enriches the experience for all the users of the site.

The process begins by sending an HTML form to the Web browser, where a user can fill it in and submit it back to the server. When the data arrives, it must be validated to make sure the user didn't forget any fields or enter anything inappropriate. If there was anything wrong with the submitted data, it has to be sent back to the user for corrections. ...

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