[Rails] Keep all validations inside a single ActiveModel::Validator class

Hi!

I plan to use ActiveModel::Validator to validate a plain Ruby class, but
I have intention to keep all validations outside the original class,
while using PresenceValidator and FormatValidator, default on Rails.
Something like this:

# payer.rb
module MyMoip
class Payer
include ActiveModel::Validations

attr_accessor :id, :name, :email,
:address_street, :address_street_number,
:address_street_extra,
:address_neighbourhood, :address_city, :address_state,
:address_country, :address_cep, :address_phone

validates_with Validators::PayerValidator
end
end

# payer_validator.rb
module MyMoip
module Validators
class PayerValidator < ActiveModel::Validator

validate :id, presence: true

def validate(record)
# more complex validations
end
end
end
end


It is possible?

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