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-rw-r--r--app/models/unavailable_domain.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/app/models/unavailable_domain.rb b/app/models/unavailable_domain.rb
index e2918b586..5e8870bde 100644
--- a/app/models/unavailable_domain.rb
+++ b/app/models/unavailable_domain.rb
@@ -12,6 +12,8 @@
 class UnavailableDomain < ApplicationRecord
   include DomainNormalizable
 
+  validates :domain, presence: true, uniqueness: true
+
   after_commit :reset_cache!
 
   private