X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/43a95731adfcf942fd9ab598c2b8e2c80911de0c..3ede205bf0e5af7a88e04009cd66ff111e0729c3:/services/api/app/models/arvados_model.rb

diff --git a/services/api/app/models/arvados_model.rb b/services/api/app/models/arvados_model.rb
index 35dd1a94c9..6cd40a4458 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -115,6 +115,10 @@ class ArvadosModel < ActiveRecord::Base
     ["#{table_name}.modified_at desc", "#{table_name}.uuid"]
   end
 
+  def self.unique_columns
+    ["id", "uuid"]
+  end
+
   # If current user can manage the object, return an array of uuids of
   # users and groups that have permission to write the object. The
   # first two elements are always [self.owner_uuid, current user's