(arrow) branch main updated: MINOR: [JS] Prevent the exception for schema "fields" is null or undefined (#42155)

[ptaylor]

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ptaylor pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/arrow.git


The following commit(s) were added to refs/heads/main by this push:
     new 5f86317232 MINOR: [JS] Prevent the exception for schema "fields" is 
null or undefined (#42155)
5f86317232 is described below

commit 5f86317232765b542a70e1314ea20201088c9c95
Author: AlbertXingZhang <12808025+albertxingzh...@users.noreply.github.com>
AuthorDate: Mon Jun 17 09:20:51 2024 -0700

    MINOR: [JS] Prevent the exception for schema "fields" is null or undefined 
(#42155)
---
 js/src/schema.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/src/schema.ts b/js/src/schema.ts
index a5b1dcb566..2eb33b7853 100644
--- a/js/src/schema.ts
+++ b/js/src/schema.ts
@@ -33,7 +33,7 @@ export class Schema<T extends TypeMap = any> {
         this.fields = (fields || []) as Field<T[keyof T]>[];
         this.metadata = metadata || new Map();
         if (!dictionaries) {
-            dictionaries = generateDictionaryMap(fields);
+            dictionaries = generateDictionaryMap(this.fields);
         }
         this.dictionaries = dictionaries;
         this.metadataVersion = metadataVersion;