Period validation

app/helpers/epp/domains_helper.rb

@@ -25,6 +25,7 @@ module Epp::DomainsHelper
       name: ph[:name],
       registrar_id: current_epp_user.registrar.try(:id),
       registered_at: Time.now,
+      period: ph[:period].to_i,
       valid_from: Date.today,
       valid_to: Date.today + ph[:period].to_i.years,
       auth_info: ph[:authInfo][:pw]

app/models/domain.rb

@@ -10,6 +10,7 @@ class Domain < ActiveRecord::Base
 
   validates :name, domain_name: true, uniqueness: { message: I18n.t('errors.messages.epp_domain_taken') }
   validates :name_puny, domain_name: true
+  validates :period, numericality: { only_integer: true, greater_than: 0, less_than: 100 }
 
   def name=(value)
     value.strip!