From edfc35424cda1b9e52d46ed7ccb45d0292d85991 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?G=C3=A1bor=20Farkas?= <gabor.farkas@gmail.com>
Date: Wed, 12 Jul 2023 14:18:14 +0200
Subject: [PATCH] [v10.0.x] Elasticsearch: Fix histogram colors in backend mode
 (#71447)

Elasticsearch: Fix histogram colors in backend mode (#71442)

elastic: backend-mode: fix histogram colors
(cherry picked from commit fdb825700751e54fd001989fe31af7eb1393ad3b)
---
 .../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 8f280972dc7..266c513397d 100644
--- a/public/app/plugins/datasource/elasticsearch/datasource.ts
+++ b/public/app/plugins/datasource/elasticsearch/datasource.ts
@@ -32,6 +32,7 @@ import {
   Field,
   LogRowContextQueryDirection,
   LogRowContextOptions,
+  FieldType,
 } from '@grafana/data';
 import { BackendSrvRequest, DataSourceWithBackend, getBackendSrv, getDataSourceSrv, config } from '@grafana/runtime';
 import { queryLogsVolume } from 'app/core/logsModel';
@@ -683,7 +684,7 @@ export class ElasticDatasource
       {
         range: request.range,
         targets: request.targets,
-        extractLevel: (dataFrame) => getLogLevelFromKey(dataFrame.name || ''),
+        extractLevel,
       }
     );
   }
@@ -1282,3 +1283,9 @@ 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);
+}