From f903aaed5917e43585f5016af61190d34dce852d Mon Sep 17 00:00:00 2001
From: Angus McLeod <angus@mcleod.org.au>
Date: Sun, 7 Oct 2018 18:03:53 +1100
Subject: [PATCH] ensure custom_value is not a blank string

---
 lib/builder.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/builder.rb b/lib/builder.rb
index 4006b8cb..b158f288 100644
--- a/lib/builder.rb
+++ b/lib/builder.rb
@@ -287,7 +287,7 @@ class CustomWizard::Builder
 
       if action['add_fields']
         action['add_fields'].each do |field|
-          value = field['value_custom'] ? field['value_custom'] : data[field['value']]
+          value = field['value_custom'].present? ? field['value_custom'] : data[field['value']]
           key = field['key']
 
           if key && (value.present? || value === false)