From 51b206766f41ba06f4ea75547d898d221504adf2 Mon Sep 17 00:00:00 2001
From: Mirko Da Corte <mirko@etherna.io>
Date: Fri, 12 Aug 2022 19:09:28 +0200
Subject: [PATCH] fix issue

---
 .../Serializers/ReferenceSerializer.cs             | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/MongODM.Core/Serialization/Serializers/ReferenceSerializer.cs b/src/MongODM.Core/Serialization/Serializers/ReferenceSerializer.cs
index b09dc86b..237f2f1c 100644
--- a/src/MongODM.Core/Serialization/Serializers/ReferenceSerializer.cs
+++ b/src/MongODM.Core/Serialization/Serializers/ReferenceSerializer.cs
@@ -318,17 +318,21 @@ public void SetDocumentId(object document, object id)
 
         public bool TryGetMemberSerializationInfo(string memberName, out BsonSerializationInfo serializationInfo)
         {
-            var modelType = configuration.Schemas.Values
+            serializationInfo = default!;
+
+            var classMap = configuration.Schemas.Values
                 .Select(s => s.ActiveMap.BsonClassMap)
                 .Where(cm => cm.GetMemberMap(memberName) != null)
-                .First()
-                .ClassType;
-            var serializer = configuration.Schemas[modelType].ActiveBsonClassMapSerializer;
+                .FirstOrDefault();
+
+            if (classMap is null)
+                return false;
 
+            var serializer = configuration.Schemas[classMap.ClassType].ActiveBsonClassMapSerializer;
             if (serializer is IBsonDocumentSerializer documentSerializer)
                 return documentSerializer.TryGetMemberSerializationInfo(memberName, out serializationInfo);
             else
-                throw new InvalidOperationException("Can't find a valid serializer");
+                return false;
         }
 
         // Helpers.