1 files changed, 32 insertions, 0 deletions
diff --git a/lib/gitlab/background_migration/user_mentions/models/design_management/design.rb b/lib/gitlab/background_migration/user_mentions/models/design_management/design.rb
new file mode 100644
index 00000000000..0cdfc6447c7
--- /dev/null
+++ b/lib/gitlab/background_migration/user_mentions/models/design_management/design.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+# rubocop:disable Style/Documentation
+
+module Gitlab
+  module BackgroundMigration
+    module UserMentions
+      module Models
+        module DesignManagement
+          class Design < ActiveRecord::Base
+            include Concerns::MentionableMigrationMethods
+
+            def self.user_mention_model
+              Gitlab::BackgroundMigration::UserMentions::Models::DesignUserMention
+            end
+
+            def user_mention_model
+              self.class.user_mention_model
+            end
+
+            def user_mention_resource_id
+              id
+            end
+
+            def user_mention_note_id
+              'NULL'
+            end
+          end
+        end
+      end
+    end
+  end
+end