concern

What problem does it solve?

Creates reusable Rails concerns to share behavior across models or controllers, reducing duplication and improving maintainability.

Core Features & Use Cases

• Provides scaffolding for ActiveSupport::Concern modules with included blocks for validations, callbacks, scopes, and class methods.
• Demonstrates how to write unit tests with RSpec to drive the development of concerns before implementation.
• Shows patterns for both model and controller concerns to promote consistent behavior across an application.

Quick Start

Create a new concern module and write its specs first, following the TDD workflow.