fix(influxdb): fixes extra semi colon due to hidden series

closes #5005

CHANGELOG.md

@@ -3,6 +3,7 @@
 * **Templating**: Fixed issue mixing row repeat and panel repeats, fixes [#4988](https://github.com/grafana/grafana/issues/4988)
 * **Templating**: Fixed issue detecting dependencies in nested variables, fixes [#4987](https://github.com/grafana/grafana/issues/4987), fixes [#4986](https://github.com/grafana/grafana/issues/4986)
 * **Graph**: Fixed broken PNG rendering in graph panel, fixes [#5025](https://github.com/grafana/grafana/issues/5025)
+* **Influxdb**: Fixes crash when hiding middle serie, fixes [#5005](https://github.com/grafana/grafana/issues/5005)
 
 # 3.0.1 Stable (2016-05-11)
 

public/app/plugins/datasource/influxdb/datasource.ts

@@ -45,7 +45,7 @@ export default class InfluxDatasource {
     var i, y;
 
     var allQueries = _.map(options.targets, (target) => {
-      if (target.hide) { return []; }
+      if (target.hide) { return ""; }
 
       queryTargets.push(target);
 
@@ -54,8 +54,12 @@ export default class InfluxDatasource {
       var query =  queryModel.render(true);
       query = query.replace(/\$interval/g, (target.interval || options.interval));
       return query;
-
-    }).join(";");
+    }).reduce((acc, current) => {
+      if (current !== "") {
+        acc += ";" + current;
+      }
+      return acc;
+    });
 
     // replace grafana variables
     allQueries = allQueries.replace(/\$timeFilter/g, timeFilter);