From f4766412ddfcd01027c801bd5139c1298e7b3888 Mon Sep 17 00:00:00 2001
From: Mahdi Amiri <mahdiamiri36@gmail.com>
Date: Wed, 21 Feb 2024 15:44:54 +0330
Subject: [PATCH] Prevent error in case of empty updateFields

---
 lib/mongoose-field-encryption.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/mongoose-field-encryption.js b/lib/mongoose-field-encryption.js
index f6b1847..d3783f1 100644
--- a/lib/mongoose-field-encryption.js
+++ b/lib/mongoose-field-encryption.js
@@ -194,6 +194,7 @@ const fieldEncryption = function (schema, options) {
 
   function updateHook(_next) {
     const next = getCompatitibleNextFunc(_next);
+    if (this._update === undefined) next();
     for (const field of fieldsToEncrypt) {
       const encryptedFieldName = encryptedFieldNamePrefix + field;
       this._update.$set = this._update.$set || {};