X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/cc5023d40182e503e8ba109fc86e09efd6337836..ca6e3f04150dae9af6b86828a5af2a4400892487:/services/api/lib/kind_and_etag.rb

diff --git a/services/api/lib/kind_and_etag.rb b/services/api/lib/kind_and_etag.rb
index 89c01ef3a2..faf3ab04dd 100644
--- a/services/api/lib/kind_and_etag.rb
+++ b/services/api/lib/kind_and_etag.rb
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 module KindAndEtag
 
   def self.included(base)
@@ -14,7 +18,7 @@ module KindAndEtag
     self.class.kind
   end
 
-  def etag
-    Digest::MD5.hexdigest(self.inspect).to_i(16).to_s(36)
+  def etag attrs=nil
+    Digest::MD5.hexdigest((attrs || self.attributes).inspect).to_i(16).to_s(36)
   end
 end