mongodb[patch]: Fix bug in mongodb storage.ts (#6361)

* Fix bug mongodb storage.ts When retrieving records the value was always JSON.stringified even if the value was already in JSON. As a result, MongoStore could not be used with standard retrievers like the ParentRetriever as it would always return documents with undefined for pageContent. * Update storage.ts --------- Co-authored-by: Jacob Lee <[email protected]>
langchain-ai · Aug 3, 2024 · 34df3f3 · 34df3f3
1 parent c8b2ffb
commit 34df3f3
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/libs/langchain-mongodb/src/storage.ts b/libs/langchain-mongodb/src/storage.ts
@@ -103,8 +103,10 @@ export class MongoDBStore extends BaseStore<string, Uint8Array> {
       }
       if (value === undefined || value === null) {
         return undefined;
-      } else if (typeof value === "object") {
+      } else if (typeof value.value === "object") {
         return encoder.encode(JSON.stringify(value.value));
+      } else if (typeof value.value === "string") {
+        return encoder.encode(value.value);
       } else {
         throw new Error("Unexpected value type");
       }