Validate DNS keys count

app/models/domain.rb

@@ -49,6 +49,7 @@ class Domain < ActiveRecord::Base
   validate :validate_period
   validate :validate_nameservers_count
   validate :validate_admin_contacts_count
+  validate :validate_dnskeys_count
   validate :validate_nameservers_uniqueness
   validate :validate_tech_contacts_uniqueness
   validate :validate_admin_contacts_uniqueness
@@ -95,6 +96,13 @@ class Domain < ActiveRecord::Base
     errors.add(:admin_contacts, :out_of_range) if admin_contacts_count.zero?
   end
 
+  def validate_dnskeys_count
+    sg = SettingGroup.domain_validation
+    min, max = sg.setting(:dnskeys_min_count).value.to_i, sg.setting(:dnskeys_max_count).value.to_i
+    return if dnskeys.reject(&:marked_for_destruction?).length.between?(min, max)
+    errors.add(:dnskeys, :out_of_range, { min: min, max: max })
+  end
+
   def validate_nameservers_uniqueness
     validated = []
     nameservers.reject(&:marked_for_destruction?).each do |ns|
@@ -176,6 +184,7 @@ class Domain < ActiveRecord::Base
 
   def all_dependencies_valid?
     validate_nameservers_count
+    validate_dnskeys_count
     validate_admin_contacts_count
 
     errors.empty?

app/models/epp/epp_domain.rb

@@ -29,6 +29,12 @@ class Epp::EppDomain < Domain
             max: domain_validation_sg.setting(:ns_max_count).value
           }
         ],
+        [:dnskeys, :out_of_range,
+          {
+            min: domain_validation_sg.setting(:dnskeys_min_count).value,
+            max: domain_validation_sg.setting(:dnskeys_max_count).value
+          }
+        ],
         [:period, :out_of_range, { value: { obj: 'period', val: period } }]
       ],
       '2200' => [

app/models/ns_set.rb

@@ -1,5 +0,0 @@
-class NsSet < ActiveRecord::Base
-  belongs_to :registrar
-  has_many :domains
-  has_and_belongs_to_many :nameservers
-end