trailblazer/reform

Health v2 · maintenance only

Adoption not part of the score

2488 stars · 180 forks observed · 2026-08-28

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

Reform is a Ruby library providing form objects decoupled from models, with validations, coercion, and nested model setup. It is framework-agnostic, integrates with Rails and simple_form, and is part of the Trailblazer architecture suite.

Use cases

• validate incoming params in API apps without touching models
• move validations out of fat ActiveRecord models into form objects
• build nested forms for has_many and has_one relationships
• compose a form from multiple model objects
• coerce and deserialize JSON input before persisting
• prepopulate form fields before rendering an edit page

When to choose

• you want validation logic separated from persistence models
• you use Rails, Hanami, or any Ruby framework and need framework-agnostic forms
• you need nested or composed forms mapping to object graphs
• you are adopting the Trailblazer architecture

When to avoid

• you want simple built-in Rails strong parameters and model validations
• your project avoids additional abstraction layers
• you need a frontend form UI library rather than server-side form objects

Facets

library · maturity stable

form-handling serialization middleware web-development backend developer-tools ruby jvm form-objects trailblazer dry-validation rails coercion nested-forms

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