From 82bdb6acf158863c928762da1c62feb56b11a700 Mon Sep 17 00:00:00 2001
From: Kalutka Zhenya <ykalytka@thingsboard.io>
Date: Wed, 4 Aug 2021 10:46:24 +0300
Subject: [PATCH] Refactoring

---
 ui-ngx/src/app/core/http/attribute.service.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ui-ngx/src/app/core/http/attribute.service.ts b/ui-ngx/src/app/core/http/attribute.service.ts
index f68835121a..df7941cef3 100644
--- a/ui-ngx/src/app/core/http/attribute.service.ts
+++ b/ui-ngx/src/app/core/http/attribute.service.ts
@@ -54,10 +54,10 @@ export class AttributeService {
     const keys = timeseries.map(attribute => encodeURI(attribute.key)).join(',');
     let url = `/api/plugins/telemetry/${entityId.entityType}/${entityId.id}/timeseries/delete` +
       `?keys=${keys}&deleteAllDataForKeys=${deleteAllDataForKeys}`;
-    if (startTs) {
+    if (isDefinedAndNotNull(startTs)) {
       url += `&startTs=${startTs}`;
     }
-    if (endTs) {
+    if (isDefinedAndNotNull(endTs)) {
       url += `&endTs=${endTs}`;
     }
     return this.http.delete(url, defaultHttpOptionsFromConfig(config));