37signals-concerns

What problem does it solve?

Creates and refactors model and controller concerns for shared behavior following 37signals patterns. Use when extracting shared code, organizing models with horizontal concerns, DRYing up controllers, or when user mentions concerns, mixins, modules, or shared behavior.

Core Features & Use Cases

• Self-contained concerns that drive horizontal reuse across models and controllers.
• Modular organization: extract repeated behavior into independent concerns for clean composition.
• Example: turning common validation and scope logic into shared Card::Closeable or Card::Assignable patterns.
• Patterns and recommendations for organizing Rails code with ActiveSupport::Concern and concerns.

Quick Start

Identify a duplicated behavior across models and move it into a self-contained concern, then include that concern in the relevant models.