X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/dcf97f13fa730ba7af3fee9b6d7044592a30a2be..ffadd5d842dc27fdc34af809c51a9982f3c4b4fa:/apps/workbench/app/controllers/pipeline_instances_controller.rb

diff --git a/apps/workbench/app/controllers/pipeline_instances_controller.rb b/apps/workbench/app/controllers/pipeline_instances_controller.rb
index 57deee43e0..c5fbda0cf3 100644
--- a/apps/workbench/app/controllers/pipeline_instances_controller.rb
+++ b/apps/workbench/app/controllers/pipeline_instances_controller.rb
@@ -300,8 +300,10 @@ class PipelineInstancesController < ApplicationController
             value = tv[:value]
           elsif tv[:default]
             value = tv[:default]
+          else
+            value = ''
           end
-          if value
+          if value.present?
             split = value.split '/'
             if CollectionsHelper.match(split[0])
               input_pdhs << split[0]