X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/2baac8a6702551064b065f752f75a9b40dbec0f5..5950f9090f499c770908622bd300d98f9f1da1fc:/services/api/lib/arvados_model_updates.rb

diff --git a/services/api/lib/arvados_model_updates.rb b/services/api/lib/arvados_model_updates.rb
index b456bd3956..7f0d7c2909 100644
--- a/services/api/lib/arvados_model_updates.rb
+++ b/services/api/lib/arvados_model_updates.rb
@@ -18,4 +18,21 @@ module ArvadosModelUpdates
       Thread.current[:anonymous_updater] = anonymous_updater_was
     end
   end
+
+  # ArvadosModel checks this to decide whether it should update the
+  # 'modified_at' field.
+  def timeless_updater
+    Thread.current[:timeless_updater] || false
+  end
+
+  def leave_modified_at_alone
+    timeless_updater_was = timeless_updater
+    begin
+      Thread.current[:timeless_updater] = true
+      yield
+    ensure
+      Thread.current[:timeless_updater] = timeless_updater_was
+    end
+  end
+
 end