dynamic dry-v contract

dynamic.rb

require 'dry/validation'

# fake dynamic fields
dynamic_fields = ->() {  %i[email name] }

contract = Class.new(Dry::Validation::Contract) do
  params do
    dynamic_fields.().each do |f|
      required(f).filled(:string)
    end
  end
end

contract.new.call("email" => 1, "name" => "john").success? # => false
contract.new.call("name" => "john").success? # => false
contract.new.call("name" => "john", "email" => "test@email.com").success? # => true