From 1018c0e8a51815184a46a6fb6e8f3d8d381cde67 Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Fri, 27 Mar 2020 09:05:58 +0000
Subject: [PATCH] Handle false values in $env() properly Fixes 2517

---
 packages/node_modules/@node-red/util/lib/util.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/node_modules/@node-red/util/lib/util.js b/packages/node_modules/@node-red/util/lib/util.js
index cd273dfae..3e35f7fde 100644
--- a/packages/node_modules/@node-red/util/lib/util.js
+++ b/packages/node_modules/@node-red/util/lib/util.js
@@ -566,7 +566,11 @@ function prepareJSONataExpression(value,node) {
     });
     expr.assign('env', function(name) {
         var val = getSetting(node, name);
-        return (val ? val : "");
+        if (typeof val !== 'undefined') {
+            return val;
+        } else {
+            return ""
+        }
     })
     expr.registerFunction('clone', cloneMessage, '<(oa)-:o>');
     expr._legacyMode = /(^|[^a-zA-Z0-9_'"])msg([^a-zA-Z0-9_'"]|$)/.test(value);