From efd798bfbd4b7badbfce357feafac476cc5e1211 Mon Sep 17 00:00:00 2001
From: Victor Tomaili <victor@serenity.is>
Date: Sat, 4 May 2024 00:03:53 +0300
Subject: [PATCH] Fix the error when try the update record without selecting
 the target linkingset property in LinkingSetRelationBehavior

The `OnAfterSave` method in `LinkingSetRelationBehavior.cs` now returns if the `Target` field has not been assigned, preventing potential errors when updating record without selecting the LinkingSetRelation data.
---
 .../LinkingSetRelation/LinkingSetRelationBehavior.cs            | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Serenity.Net.Services/RequestHandlers/IntegratedFeatures/LinkingSetRelation/LinkingSetRelationBehavior.cs b/src/Serenity.Net.Services/RequestHandlers/IntegratedFeatures/LinkingSetRelation/LinkingSetRelationBehavior.cs
index 1deb1a5f67..657ad7a184 100644
--- a/src/Serenity.Net.Services/RequestHandlers/IntegratedFeatures/LinkingSetRelation/LinkingSetRelationBehavior.cs
+++ b/src/Serenity.Net.Services/RequestHandlers/IntegratedFeatures/LinkingSetRelation/LinkingSetRelationBehavior.cs
@@ -364,7 +364,7 @@ private void DetailListSave(IUnitOfWork uow, object masterId, IList<IRow> oldRow
     /// <inheritdoc/>
     public override void OnAfterSave(ISaveRequestHandler handler)
     {
-        if (Target.AsObject(handler.Row) is not IList newList)
+        if (!handler.Row.IsAssigned(Target) || Target.AsObject(handler.Row) is not IList newList)
             return;
 
         var idField = handler.Row.IdField;