From e94d615b2b089b3d425b31d402f08aa3a5b7b3ee Mon Sep 17 00:00:00 2001
From: Ali <alihassan.m@hotmail.com>
Date: Sun, 15 Dec 2024 21:55:28 -0500
Subject: [PATCH] Fixes issue #7370: return empty array from compressDocuments
 if the documents parameter is null or empty

---
 libs/langchain-cohere/src/rerank.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/langchain-cohere/src/rerank.ts b/libs/langchain-cohere/src/rerank.ts
index 78a13efa2f83..30eb653667ba 100644
--- a/libs/langchain-cohere/src/rerank.ts
+++ b/libs/langchain-cohere/src/rerank.ts
@@ -60,6 +60,9 @@ export class CohereRerank extends BaseDocumentCompressor {
     documents: Array<DocumentInterface>,
     query: string
   ): Promise<Array<DocumentInterface>> {
+    if (documents == null || documents.length == 0) {
+      return [];
+    }
     const _docs = documents.map((doc) => doc.pageContent);
     const { results } = await this.client.rerank({
       model: this.model,