From 56622c2ba1e75d12c2db8caf1e2c91f89d3f1745 Mon Sep 17 00:00:00 2001
From: Lukas Siatka <lukasz.siatka@grafana.com>
Date: Wed, 6 May 2020 19:05:00 +0200
Subject: [PATCH] Chore: fixes Loki annotation tags deduplication (#24275)

(cherry picked from commit fa260fec87b9295b27ee384a056c5733d8b9ca53)
---
 public/app/plugins/datasource/loki/datasource.test.ts | 1 +
 public/app/plugins/datasource/loki/datasource.ts      | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/public/app/plugins/datasource/loki/datasource.test.ts b/public/app/plugins/datasource/loki/datasource.test.ts
index 45fac7aff0d..a806a6296fc 100644
--- a/public/app/plugins/datasource/loki/datasource.test.ts
+++ b/public/app/plugins/datasource/loki/datasource.test.ts
@@ -355,6 +355,7 @@ describe('LokiDatasource', () => {
                   {
                     stream: {
                       label: 'value',
+                      label2: 'value ',
                     },
                     values: [['1549016857498000000', 'hello']],
                   },
diff --git a/public/app/plugins/datasource/loki/datasource.ts b/public/app/plugins/datasource/loki/datasource.ts
index 828277d3ea2..cf9928f1adb 100644
--- a/public/app/plugins/datasource/loki/datasource.ts
+++ b/public/app/plugins/datasource/loki/datasource.ts
@@ -497,7 +497,7 @@ export class LokiDatasource extends DataSourceApi<LokiQuery, LokiOptions> {
       const tags: string[] = [];
       for (const field of frame.fields) {
         if (field.labels) {
-          tags.push.apply(tags, Object.values(field.labels));
+          tags.push.apply(tags, [...new Set(Object.values(field.labels).map((label: string) => label.trim()))]);
         }
       }
       const view = new DataFrameView<{ ts: string; line: string }>(frame);