X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/f26f70d0a60798065c5f7a5cb91b95587cc9e9ef..16f704326f44fd1e5e5e60b936c9b5895d6a6ff8:/apps/workbench/app/helpers/provenance_helper.rb

diff --git a/apps/workbench/app/helpers/provenance_helper.rb b/apps/workbench/app/helpers/provenance_helper.rb
index 0b83975426..9b4d265dfa 100644
--- a/apps/workbench/app/helpers/provenance_helper.rb
+++ b/apps/workbench/app/helpers/provenance_helper.rb
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 module ProvenanceHelper
 
   class GenerateGraph
@@ -228,7 +232,11 @@ module ProvenanceHelper
                   # Search for any collection with this PDH
                   cols = @opts[:input_collections][pdh]
                 end
-                names = cols.collect{|x| x[:name]}.uniq
+                if cols
+                  names = cols.collect{|x| x[:name]}.uniq
+                else
+                  names = ['(collection not found)']
+                end
                 input_name = names.first
                 if names.length > 1
                   input_name += " + #{names.length - 1} more"