From 5b13cc48efd32ad5859eee98d99900ebc3a9763a Mon Sep 17 00:00:00 2001
From: Damien de Lemeny <contact@ddelemeny.me>
Date: Tue, 20 Feb 2024 15:19:58 -0500
Subject: [PATCH] Skip processing when frame is empty

---
 src/datasource/processResponse.ts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/datasource/processResponse.ts b/src/datasource/processResponse.ts
index c22670c..1cf1737 100644
--- a/src/datasource/processResponse.ts
+++ b/src/datasource/processResponse.ts
@@ -1,4 +1,4 @@
-import { DataFrame, DataLink, DataQueryRequest, DataQueryResponse, FieldType } from "@grafana/data";
+import { DataFrame, DataLink, DataQueryRequest, DataQueryResponse, Field, FieldType } from "@grafana/data";
 import { getDataSourceSrv } from "@grafana/runtime";
 import { QuickwitDataSource } from 'datasource';
 import { DataLinkConfig, ElasticsearchQuery } from "../types";
@@ -22,6 +22,10 @@ export function processLogsDataFrame(datasource: QuickwitDataSource, dataFrame:
   if (!dataFrame.refId || dataFrame.refId.startsWith('log-volume')) {
     return;
   }
+  // Skip empty dataframes
+  if (dataFrame.length===0 || dataFrame.fields.length === 0) {
+    return;
+  }
   if (datasource.logMessageField) {
     const messageFields = datasource.logMessageField.split(',');
     let field_idx_list = [];
@@ -45,7 +49,7 @@ export function processLogsDataFrame(datasource: QuickwitDataSource, dataFrame:
       displayedMessages[idx] = displayedMessage.trim();
     }
 
-    const newField = {
+    const newField: Field = {
       name: getCustomFieldName('message'),
       type: FieldType.string,
       config: {},