37signals-model

What problem does it solve?

Rails apps often end up with anemic models and scattered business logic in controllers or services. This skill guides building fat domain models that encapsulate business logic, validations, and domain behavior, organized with concerns for horizontal reuse.

Core Features & Use Cases

• Fat models with business logic, validations, scopes, callbacks, and concerns to share behavior across models.
• Clear patterns for associations, defaults via lambdas, and using Current for request-context data to support multi-tenant or per-user scenarios.
• Practical structure and examples for typical domain modeling in Rails, including how to place logic where it belongs.

Quick Start

Create a new model that includes rich business logic, uses concerns to organize behavior, and defines validations, scopes, and callbacks.