From 800454a3c7a059f15275b5078eace167ca142758 Mon Sep 17 00:00:00 2001
From: Rouven Alexander Rieker <therouv@googlemail.com>
Date: Wed, 17 Aug 2022 14:53:08 +0200
Subject: [PATCH] fix: php8.1 compatibility for yaml export with null values

---
 Model/File/Writer/YamlWriter.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Model/File/Writer/YamlWriter.php b/Model/File/Writer/YamlWriter.php
index 15d24cf..c0aad1a 100644
--- a/Model/File/Writer/YamlWriter.php
+++ b/Model/File/Writer/YamlWriter.php
@@ -94,6 +94,10 @@ private function getIndentation($length, $string = ' ')
      */
     private function prepareValue($value)
     {
+        if ($value === null) {
+            return '';
+        }
+
         if (is_numeric($value)) {
             return $value;
         }