X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/f7e3001b53e9f26fd1d413308093bb9700bb9287..02d7f4e820b65d83a5e3709dc14b6d72b9f5ab49:/services/api/db/migrate/20141208164553_owner_uuid_index.rb

diff --git a/services/api/db/migrate/20141208164553_owner_uuid_index.rb b/services/api/db/migrate/20141208164553_owner_uuid_index.rb
index 35358a0736..a6d4e76404 100644
--- a/services/api/db/migrate/20141208164553_owner_uuid_index.rb
+++ b/services/api/db/migrate/20141208164553_owner_uuid_index.rb
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 class OwnerUuidIndex < ActiveRecord::Migration
   def tables_with_owner_uuid
     %w{api_clients authorized_keys collections groups humans
@@ -14,7 +18,13 @@ class OwnerUuidIndex < ActiveRecord::Migration
 
   def down
     tables_with_owner_uuid.each do |table|
-      remove_index table.to_sym, :owner_uuid
+      indexes = ActiveRecord::Base.connection.indexes(table)
+      owner_uuid_index = indexes.select do |index|
+        index.columns == ['owner_uuid']
+      end
+      if !owner_uuid_index.empty?
+        remove_index table.to_sym, :owner_uuid
+      end
     end
   end
 end