Add check for string type for getVariableDescriptors function

Author: doubleUTF

package.json

@@ -1,7 +1,7 @@
 {
   "name": "oci-metrics-datasource",
   "private": true,
-  "version": "3.0.2",
+  "version": "3.0.3",
   "description": "Oracle Cloud Infrastructure Metrics Data Source for Grafana",
   "main": "index.js",
   "scripts": {

src/datasource.js

@@ -787,7 +787,7 @@ export default class OCIDatasource {
     const vars = this.templateSrv.variables || [];
 
     if (regex) {
-      let regexVars = vars.filter((item) => item.query.match(regex) !== null);
+      let regexVars = vars.filter((item) => _.isString(item.query) && item.query.match(regex) !== null);
       if (includeCustom) {
         const custom = vars.filter(
           (item) => item.type === "custom" || item.type === "constant"

src/plugin.json

@@ -29,8 +29,8 @@
       },
       { "name": "UPL", "url": "https://oss.oracle.com/licenses/upl" }
     ],
-    "version": "3.0.2",
-    "updated": "2022-02-09"
+    "version": "3.0.3",
+    "updated": "2022-02-10"
   },
 
   "dependencies": {