cgriego/active_attr

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1195 stars · 91 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

ActiveAttr is a Ruby gem providing composable modules that let you build plain Ruby objects with ActiveModel-compatible features like attribute definitions, defaults, typecasting, and querying. It fills the gaps in ActiveModel so POROs can behave like ORM-backed models without a database.

Use cases

• create plain ruby models with activemodel compatibility
• define typed attributes with defaults on non-database models
• build form objects that behave like active record models
• add attribute typecasting to plain old ruby objects
• make service objects satisfy the activemodel api
• extract model logic out of active record into lightweight classes

When to choose

• you need ActiveModel API compliance without ActiveRecord or a database
• you want composable attribute functionality instead of a full ORM
• you're building form objects, service objects, or domain models in a Rails app

When to avoid

• you're already using ActiveRecord or another full ORM with persistence
• you need a lightweight modern alternative like Virtus or dry-types with different APIs
• your project doesn't use Ruby

Facets

library · maturity active

orm serialization form-handling web-development backend developer-tools ruby jvm activemodel plain-ruby-models attributes typecasting rails

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