From fdb825700751e54fd001989fe31af7eb1393ad3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Farkas?= <gabor.farkas@gmail.com>
Date: Wed, 12 Jul 2023 13:59:51 +0200
Subject: [PATCH] Elasticsearch: Fix histogram colors in backend mode (#71442)

elastic: backend-mode: fix histogram colors
---
 .../app/plugins/datasource/elasticsearch/datasource.ts   | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/public/app/plugins/datasource/elasticsearch/datasource.ts b/public/app/plugins/datasource/elasticsearch/datasource.ts
index 3a4856233e2..3f75a3cc0cb 100644
--- a/public/app/plugins/datasource/elasticsearch/datasource.ts
+++ b/public/app/plugins/datasource/elasticsearch/datasource.ts
@@ -31,6 +31,7 @@ import {
   SupplementaryQueryOptions,
   toUtc,
   AnnotationEvent,
+  FieldType,
 } from '@grafana/data';
 import { DataSourceWithBackend, getDataSourceSrv, config, BackendSrvRequest } from '@grafana/runtime';
 import { getTimeSrv, TimeSrv } from 'app/features/dashboard/services/TimeSrv';
@@ -626,7 +627,7 @@ export class ElasticDatasource
       {
         range: request.range,
         targets: request.targets,
-        extractLevel: (dataFrame) => getLogLevelFromKey(dataFrame.name || ''),
+        extractLevel,
       }
     );
   }
@@ -1155,3 +1156,9 @@ function createContextTimeRange(rowTimeEpochMs: number, direction: string, inter
     }
   }
 }
+
+function extractLevel(dataFrame: DataFrame): LogLevel {
+  const valueField = dataFrame.fields.find((f) => f.type === FieldType.number);
+  const name = valueField?.labels?.['level'] ?? '';
+  return getLogLevelFromKey(name);
+}