class Champs::IbanChamp < Champ validates_with IbanValidator, if: :validate_champ_value_or_prefill? after_validation :format_iban def for_api to_s.gsub(/\s+/, '') end def for_api_v2 for_api end private def format_iban self.value = value&.gsub(/\s+/, '')&.gsub(/(.{4})/, '\0 ') end end