Example of using custom dry types

custom-types.rb

require 'dry/schema'
require 'dry/types'

class MyObject
  def initialize(value)
    @value = value
  end

  def value
    return @value if @value.is_a?(Array)
    @value.split("|")
  end
end

module Types
  include Dry.Types()
end

MyObjectType = Types.Constructor(MyObject)

TypeContainer = Dry::Schema::TypeContainer.new
TypeContainer.register('params.my_object_type', MyObjectType)

MySchema = Dry::Schema.Params do
  config.types = TypeContainer
  required(:received).filled(:my_object_type)
end

result = MySchema.call({
  received: "string|to|split"
})

puts result.inspect
puts result[:received].value