From f0deb11e7f7d758b5e0805da39cb96ac335b83c7 Mon Sep 17 00:00:00 2001
From: Thomas Gelf <thomas@gelf.net>
Date: Mon, 16 Aug 2021 06:33:34 +0200
Subject: [PATCH] IcingaObject: no empty vars for unmodified plain

---
 library/Director/Objects/IcingaObject.php | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/library/Director/Objects/IcingaObject.php b/library/Director/Objects/IcingaObject.php
index 4b015500..7ee7c7dd 100644
--- a/library/Director/Objects/IcingaObject.php
+++ b/library/Director/Objects/IcingaObject.php
@@ -3067,9 +3067,12 @@ abstract class IcingaObject extends DbObject implements IcingaConfigRenderer
         }
 
         if ($this->supportsCustomVars()) {
-            $props['vars'] = (object) [];
-            foreach ($this->vars()->getOriginalVars() as $name => $var) {
-                $props['vars']->$name = $var->getValue();
+            $originalVars = $this->vars()->getOriginalVars();
+            if (! empty($originalVars)) {
+                $props['vars'] = (object) [];
+                foreach ($originalVars as $name => $var) {
+                    $props['vars']->$name = $var->getValue();
+                }
             }
         }
         if ($this->supportsGroups()) {