concern-patterns

Refactor shared Rails behavior into model and controller concerns.

Updated Jun 9, 2026

Search Tags:#code reuse #DRY #Rails #concerns #Rails 8

Ready to run

npx skills add https://github.com/arthun01/achados-uesc --skill concern-patterns-arthun01

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: concern-patterns
Source: https://github.com/arthun01/achados-uesc/tree/main/.opencode/skills/concern-patterns
Command: npx skills add https://github.com/arthun01/achados-uesc --skill concern-patterns-arthun01

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps developers refactor shared behavior in Rails applications by creating and using concerns, reducing duplication and improving maintainability.

Core Features & Use Cases

Shared Behavior Extraction: Extract common code into concerns for reuse across models and controllers.
Model and Controller Concerns: Organize and manage shared associations, validations, scopes, and methods.
Use Case: When you have multiple models or controllers with similar functionality, you can create a concern to encapsulate that shared behavior, making your code more DRY and maintainable.

Quick Start

Include the 'concern-patterns' skill in your Rails application to start refactoring shared behavior into concerns.

Frequently Asked Questions about concern-patterns

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

FAQPage Schema

How do I extract shared behavior in Rails to reduce code duplication?▼

You can extract shared behavior in Rails by moving duplicated logic into concerns. This encapsulates shared associations, validations, scopes, and methods for models and controllers, making your application DRY and maintainable.

What are Rails concerns used for in model and controller refactoring?▼

Rails concerns are modules used to organize shared functionality. They encapsulate common validations, scopes, and methods for models and controllers, reducing code duplication and improving maintainability across your application.

How do I refactor shared validations and scopes in Rails 8?▼

To refactor shared validations and scopes in Rails 8, extract them into model concerns. This encapsulates the shared logic into a dedicated module, reducing duplication and keeping your models clean and maintainable.

Do Rails concerns require Ruby 3.3 and Rails 8.0?▼

Yes, using these concern patterns requires Rails 8.0 and Ruby 3.3 or newer. This ensures compatibility with the latest framework features and Ruby language enhancements for managing shared model and controller behavior.

What is the best way to DRY up shared methods in Rails controllers?▼

The best way to DRY up shared methods in Rails controllers is to extract them into controller concerns. This approach encapsulates shared behavior into modules, reducing duplication and keeping your controllers maintainable.

When should I avoid using concerns for code reuse in Rails?▼

You should avoid using concerns when the shared behavior is highly complex or involves distinct domain concepts. If extracting the logic into a concern obscures object boundaries, consider service objects or other Rails patterns instead.