Rails Active Record Patterns

Master Active Record patterns for building robust Rails models with proper associations, validations, scopes, and query optimization.

Overview

Active Record is Rails' Object-Relational Mapping (ORM) layer that connects model classes to database tables. It implements the Active Record pattern, where each object instance represents a row in the database and includes both data and behavior.

Installation and Setup

Creating Models

# Generate a model with migrations
rails generate model User name:string email:string:uniq