From eecb0e59220c7c29811842a7911b6b2a3b872b5e Mon Sep 17 00:00:00 2001
From: Jean-Louis Leysens <jloleysens@gmail.com>
Date: Tue, 8 Sep 2020 09:59:20 +0200
Subject: [PATCH] fix empty string in selected indices (#76855)

---
 .../indices_and_data_streams_field.tsx        | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/x-pack/plugins/snapshot_restore/public/application/components/policy_form/steps/step_settings/fields/indices_and_data_streams_field/indices_and_data_streams_field.tsx b/x-pack/plugins/snapshot_restore/public/application/components/policy_form/steps/step_settings/fields/indices_and_data_streams_field/indices_and_data_streams_field.tsx
index 6f89427516453b..54ea73a3e7a968 100644
--- a/x-pack/plugins/snapshot_restore/public/application/components/policy_form/steps/step_settings/fields/indices_and_data_streams_field/indices_and_data_streams_field.tsx
+++ b/x-pack/plugins/snapshot_restore/public/application/components/policy_form/steps/step_settings/fields/indices_and_data_streams_field/indices_and_data_streams_field.tsx
@@ -67,7 +67,7 @@ export const IndicesAndDataStreamsField: FunctionComponent<Props> = ({
 
   // We assume all indices if the config has no indices entry or if we receive an empty array
   const [isAllIndices, setIsAllIndices] = useState<boolean>(
-    !config.indices || (Array.isArray(config.indices) && config.indices.length === 0)
+    config.indices == null || (Array.isArray(config.indices) && config.indices.length === 0)
   );
 
   const onUpdate = (data: IndicesConfig) => {
@@ -135,12 +135,17 @@ export const IndicesAndDataStreamsField: FunctionComponent<Props> = ({
           );
           onUpdate({ indices: undefined });
         } else {
-          onUpdate({
-            indices:
-              selectIndicesMode === 'custom'
-                ? indexPatterns.join(',')
-                : [...(indicesAndDataStreamsSelection || [])],
-          });
+          _onUpdate(
+            {
+              indices:
+                selectIndicesMode === 'custom'
+                  ? indexPatterns.join(',')
+                  : [...(indicesAndDataStreamsSelection || [])],
+            },
+            {
+              validateIndicesCount: true,
+            }
+          );
         }
       }}
     />