From 74966ed969c84a2d43c51a51d86a294fa102966f Mon Sep 17 00:00:00 2001
From: Kevin Jump <kevin@thejumps.co.uk>
Date: Wed, 10 Apr 2024 12:35:13 +0100
Subject: [PATCH] #612 ensure we return an empty string if a mapper returns
 null.

---
 uSync.Core/Mapping/SyncValueMapperCollection.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/uSync.Core/Mapping/SyncValueMapperCollection.cs b/uSync.Core/Mapping/SyncValueMapperCollection.cs
index 4d15b51f..df3c0b33 100644
--- a/uSync.Core/Mapping/SyncValueMapperCollection.cs
+++ b/uSync.Core/Mapping/SyncValueMapperCollection.cs
@@ -55,7 +55,7 @@ public string GetExportValue(object value, string editorAlias)
                     mappedValue = mapper.GetExportValue(mappedValue, editorAlias);
                 }
 
-                return mappedValue;
+                return mappedValue ?? string.Empty;
             }
 
             return GetSafeValue(value);