bugfix: Add nil check in escapeAllStrings to prevent TypeError when upsert vectors (#3789)

packages/components/nodes/vectorstores/Redis/utils.ts

@@ -1,3 +1,5 @@
+import { isNil } from 'lodash'
+
 /*
  * Escapes all '-' characters.
  * Redis Search considers '-' as a negative operator, hence we need
@@ -8,6 +10,10 @@ export const escapeSpecialChars = (str: string) => {
 }
 
 export const escapeAllStrings = (obj: object) => {
+    if (isNil(obj)) {
+        // return if obj is null or undefined to avoid "TypeError: Cannot convert undefined or null to object"
+        return
+    }
     Object.keys(obj).forEach((key: string) => {
         // @ts-ignore
         let item = obj[key]