GitHub - solnic/virtus: [DISCONTINUED ] Attributes on Steroids for Plain Old Ruby Objects

DISCONTINUED Working on virtus taught me a lot about handling data in Ruby, which involves coercions, type safety and validation (amongst other things). Even though the project has been successful, and serving well for many people, I decided to build something better. As a result, dry-types, dry-struct and dry-schema were born. These projects should be considered as virtus' successors, with better

[morygonzalez]

Rails で Form Object を使えるようにする gem

[yyamano]

Virtus allows you to define attributes on classes, modules or class instances with optional information about types, reader/writer method visibility and coercion behavior.

[t-wada]

DataMapper の Property API を独立させた gem. 依存 gem も少ない。概ね ActiveModel 系機能に似ているけど、型付きの attribute やそのデフォルト値を簡単に定義できるのがいい感じ。

[willnet]

DataMapperからpartial extraction された gem で、普通のオブジェクトに attributes を設定できるプラグイン

[toshiwo]

attributes / validators を追加するgem