Modularize shared Rails behavior with model and controller concerns.
npx skills add https://github.com/rubakas/agent-notes --skill rails-concerns
Please help me install this Agent Skill. Skill: rails-concerns Source: https://github.com/rubakas/agent-notes/tree/main/rails-concerns Command: npx skills add https://github.com/rubakas/agent-notes --skill rails-concerns
Rails projects often duplicate shared behavior across models and controllers; concerns help centralize and reuse that logic to keep code DRY and maintainable.
Add and include Rails concerns in your models and controllers to modularize shared functionality and improve testability.
High-intent search queries and answers about installing and using this skill.
To extract shared Rails behavior, encapsulate the logic in namespaced concerns using ActiveSupport::Concern. Define required methods and leverage included and class_methods blocks to modularize functionality across models and controllers for better reuse.
A Rails concern is a module that centralizes duplicated model and controller logic to keep code DRY. Use concerns when you need to extract shared behavior, such as Authentication or feature-specific logic like Card::Closeable, to promote reuse and testability.
Organize ActiveSupport::Concern modules under namespaced directories matching their domain. Document the required methods for including classes within the concern, ensuring predictable composition and clear usage patterns across the Rails codebase.
The best way to test Rails concerns is to include the module in focused test dummy classes or directly test the including models. This isolates the shared behavior, verifying the ActiveSupport::Concern logic functions predictably before composition.
Avoid using Rails concerns when the shared behavior is highly specific to a single class or when composition creates complex, hidden dependencies. If extracting the logic does not promote reuse across multiple models or controllers, keep it inline.
LaunchPadLabGenerate TDD-oriented Rails ActiveSupport::Concern modules for shared model or controller behavior.
joshyorkoExtract repeated model and controller logic into Rails concerns with ActiveSupport::Concern.
reckerswartzGenerate reusable Rails concerns with ActiveSupport::Concern and RSpec specs.
nschnebleScaffold reusable ActiveSupport::Concern modules for shared Rails model or controller behavior.
