From 596dfc304dfdf074595fc11e82074d8681e35b5d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Torkel=20=C3=96degaard?= <torkel.odegaard@gmail.com>
Date: Fri, 20 Feb 2015 10:45:23 +0100
Subject: [PATCH] Added guard for template variables missing query field, Fixes
 #1501

---
 src/app/features/templating/templateSrv.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/app/features/templating/templateSrv.js b/src/app/features/templating/templateSrv.js
index c44ff0a5669..8fc45097944 100644
--- a/src/app/features/templating/templateSrv.js
+++ b/src/app/features/templating/templateSrv.js
@@ -45,6 +45,9 @@ function (angular, _) {
     };
 
     this.containsVariable = function(str, variableName) {
+      if (!str) {
+        return false;
+      }
       return str.indexOf('$' + variableName) !== -1 || str.indexOf('[[' + variableName + ']]') !== -1;
     };