1 files changed, 7 insertions, 2 deletions
diff --git a/app/models/serverless/domain_cluster.rb b/app/models/serverless/domain_cluster.rb
index a8365649dd1..44463a56327 100644
--- a/app/models/serverless/domain_cluster.rb
+++ b/app/models/serverless/domain_cluster.rb
@@ -4,11 +4,16 @@ module Serverless
   class DomainCluster < ApplicationRecord
     self.table_name = 'serverless_domain_cluster'
 
+    HEX_REGEXP = %r{\A\h+\z}.freeze
+
     belongs_to :pages_domain
     belongs_to :knative, class_name: 'Clusters::Applications::Knative', foreign_key: 'clusters_applications_knative_id'
     belongs_to :creator, class_name: 'User', optional: true
 
-    validates :pages_domain, :knative, :uuid, presence: true
-    validates :uuid, uniqueness: true, length: { is: 14 }
+    validates :pages_domain, :knative, presence: true
+    validates :uuid, presence: true, uniqueness: true, length: { is: Gitlab::Serverless::Domain::UUID_LENGTH },
+              format: { with: HEX_REGEXP, message: 'only allows hex characters' }
+
+    default_value_for(:uuid, allows_nil: false) { Gitlab::Serverless::Domain.generate_uuid }
   end
 end