ruby-rails-application

SKILL.md

Ruby Rails Application

Table of Contents

Overview

When to Use

Quick Start

Reference Guides

Best Practices

Overview

Build comprehensive Ruby on Rails applications with proper model associations, RESTful controllers, Active Record queries, authentication systems, middleware chains, and view rendering following Rails conventions.

When to Use

Building Rails web applications

Implementing Active Record models with associations

Creating RESTful controllers and actions

Integrating authentication and authorization

Building complex database relationships

Implementing Rails middleware and filters

Quick Start

Minimal working example:

rails new myapp --api --database=postgresql
cd myapp
rails db:create

Reference Guides

Detailed implementations in the references/ directory:

Guide
Contents

Rails Project Setup
Rails Project Setup

Models with Active Record
Models with Active Record

Database Migrations
Database Migrations

Controllers with RESTful Actions
Controllers with RESTful Actions

Authentication with JWT
Authentication with JWT

Active Record Queries
Active Record Queries

Serializers
Serializers

Best Practices

✅ DO

Use conventions over configuration

Leverage Active Record associations

Implement proper scopes for queries

Use strong parameters for security

Implement authentication in ApplicationController

Use services for complex business logic

Implement proper error handling

Use database migrations for schema changes

Validate all inputs at model level

Use before_action filters appropriately

❌ DON'T

Use raw SQL without parameterization

Implement business logic in controllers

Trust user input without validation

Store secrets in code

Use select * without specifying columns

Forget N+1 query problems (use includes/joins)

Implement authentication in each controller

Use global variables

Ignore database constraints

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