rails-expert

Optimize Rails 7 ActiveRecord queries with includes and eager_load.

Updated May 14, 2026
One-click install
npx skills add https://github.com/nkseth/copilot-dev-skills --skill rails-expert-nkseth
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: rails-expert
Source: https://github.com/nkseth/copilot-dev-skills/tree/main/skills/rails-expert
Command: npx skills add https://github.com/nkseth/copilot-dev-skills --skill rails-expert-nkseth

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Rails apps often suffer from inefficient Active Record queries, missing real-time updates, and slow background job processing. This Skill provides patterns to optimize data access, implement real-time UI with Turbo Frames/Streams, wire up Action Cable for WebSockets, and orchestrate background jobs with Sidekiq, all while maintaining testable Rails 7+ codebases.

Core Features & Use Cases

  • Active Record optimization: use includes/eager_load to avoid N+1 queries and improve query performance in index and associated views.
  • Real-time UI and background jobs: leverage Turbo Frames/Streams for partial updates and Sidekiq for asynchronous processing with reliable job handling.
  • Comprehensive testing: write RSpec test suites that cover models, controllers, and feature specs to ensure regressions are caught.

Quick Start

Create a new Rails 7 project, apply ActiveRecord includes to optimize queries, enable Turbo Frames/Streams for partial updates, and set up a basic Sidekiq-backed background job workflow.

Frequently Asked Questions about rails-expert

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fix N+1 queries in ActiveRecord with eager loading?▼

Fix ActiveRecord N+1 queries by applying includes and eager_load to preload associations. This prevents per-record database hits during index rendering and improves data access performance.

How do I implement partial page updates with Turbo Frames and Streams in Rails 7?▼

Implement partial page updates using Turbo Frames and Streams to refresh isolated DOM sections. This approach replaces full page reloads with targeted real-time UI updates without writing custom JavaScript.

What's the best way to set up Sidekiq background jobs in a Rails application?▼

Set up Sidekiq background jobs by configuring asynchronous processing queues in Rails. This orchestrates reliable background job handling for heavy tasks outside the request-response cycle.

Does Action Cable work with Turbo Streams for real-time WebSockets?▼

Action Cable works with Turbo Streams to broadcast real-time WebSockets updates. Wiring Action Cable channels broadcasts server-side changes directly to connected clients for live UI features.

How do I write RSpec tests covering Rails models and feature specs?▼

Write RSpec test suites covering models, controllers, and feature specs to catch regressions. Comprehensive testing ensures ActiveRecord query changes and Turbo integration maintain expected behavior.

Can I use these Rails optimization patterns with migration-safe workflows?▼

Apply these Rails optimization patterns within migration-safe workflows by structuring database changes carefully. This ensures ActiveRecord query improvements and background job additions deploy without breaking existing schema.