dry-schema 
Links
Supported Ruby versions
This library officially supports following Ruby versions:
- MRI >=
2.4 - jruby >=
9.2
It should work on MRI 2.3.x too, but there's no official support for this version.
License
See LICENSE file.
Schema coercion & validation
This library officially supports following Ruby versions:
2.49.2It should work on MRI 2.3.x too, but there's no official support for this version.
See LICENSE file.
Schema coercion & validation
https://dry-rb.org/gems/dry-schema
MIT License