dryv.rb

require 'bundler'
Bundler.require

schema = Dry::Validation.Schema do
  key(:email).required

  key(:age).required(:int?, gt?: 18)
end

form = Dry::Validation.Form do
  key(:email).required

  key(:age).required(:int?, gt?: 18)
end


[schema, form].each do |caller|
  errors = caller.(email: 'jane@doe.org', age: 19).messages

  puts errors.inspect
end