X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/da51b9328abab2df757ed13eadc7c3557315094b..0561bd0c3c07257fd58ded6c7cfa5feeae97af57:/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 9df1289839..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)
@@ -5,13 +9,16 @@ module KindAndEtag
   end
 
   module ClassMethods
+    def kind
+      'arvados#' + self.to_s.camelcase(:lower)
+    end
   end
 
   def kind
-    'arvados#' + self.class.to_s.camelcase(:lower)
+    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