Rails Way: ActiveRecord Deep Dive
Rails Way: ActiveRecord Deep Dive
Advanced Usage of ActiveRecord in Rails 8 Applications
About the Book
The Rails™ 8 Way: ActiveRecord Deep Dive is the comprehensive, in-depth reference guide on Active Record. In this book, we go into the advanced topics of ActiveRecord, and we cover all important aspects of this vital part of Rails.
This book is the first edition where we spun off this part from the main book, The Rails™ 8 Way, and is not a tutorial or basic introduction to Ruby on Rails. For this book to be useful, you have to have a good understanding of Rails and preferably have an initial application already up and running. We will not cover migrations or any of the topics already covered in The Rails™ 8 Way.
We hope that the examples and explanations will serve as a source of inspiration for what can be accomplished by using ActiveRecord. Whether you are building complex data models, optimizing queries, or designing database-backed features, we hope that these demonstrations will inspire you to take advantage of the full potential of ActiveRecord in your projects.
These are the other two parts of the series:
- The Rails 8 Way — the comprehensive, authoritative reference guide for professionals delivering production-quality code using modern Ruby on Rails
- Building Progressive Web Apps with Rails — which will answer your question: How do I build a modern web frontend with Rails, entirely without an SPA framework like React, Angular, or Vue.
About the Authors
Table of Contents
-
About this Book
- Cover
- About the Authors
-
Acknowledgments
- Goals
- Prerequisites
- Book Structure
- Licenses, Attributions and Trademark Notice
- Introduction
-
Basics
- Macro-Style Methods
- Defining Attributes
- CRUD: Creating, Reading, Updating, Deleting
- Database Locking
- Ignoring Columns
- Connections to Multiple Databases
- Using the Database Connection Directly
- Convention over Configuration
- Conclusion
-
Associations
- The Association Hierarchy
- One-to-Many Relationships
- Belongs to Associations
- Has Many Associations
- Many-to-Many Relationships
- One-to-One Relationships
- Working with Unsaved Objects and Associations
- Association Extensions
-
The
CollectionProxyClass - Conclusion
-
Queries
- Query Methods
- Custom SQL Queries
- Scopes
- Query Log Tags
- Conclusion
-
Validations
- Finding Errors
- Included Validations
- Common Validation Options
- Conditional Validation
- Short-form Validation
- Custom Validation Techniques
- Skipping Validations
- Working with the Errors object
- Conclusion
-
ActiveModel Non-Persisted Models
- Conclusion
-
Common Ground
-
Polymorphic
has_manyRelationships - Modules for Reusing Common Behavior
- Delegated Types
- Single-Table Inheritance (STI)
- Abstract Base Model Classes
- Value Objects
-
Polymorphic
-
Atrributes and Types
- Attributes API
- Serialized Attributes
- Enums
-
Supporting Functionality
- Generating Secure Tokens
- Calculation Methods
- Modifying Active Record Classes at Runtime
- Foreign-key Constraints
- Other Connection Methods
- Callbacks
- Batch Operations
-
PostgreSQL
- Array Type
- Network Address Types
- UUID Type
- Range Types
- JSON Type
- Index Types
- Wrap Up
- Notes
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