From a93c60d57e0efd64bf938a08690f4c8a69511596 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Fri, 27 Jun 2025 18:58:57 +0800
Subject: [PATCH] Mongodb

---
 .../ExpToSql/VisitorItems/FieldPathExtractor.cs                 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/VisitorItems/FieldPathExtractor.cs b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/VisitorItems/FieldPathExtractor.cs
index a78d67d92..675314173 100644
--- a/Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/VisitorItems/FieldPathExtractor.cs
+++ b/Src/Asp.NetCore2/SqlSugar.MongoDbCore/ExpToSql/VisitorItems/FieldPathExtractor.cs
@@ -120,7 +120,7 @@ namespace SqlSugar.MongoDb
             {
                 resultString = string.Join(".", parts);
             }
-            var isJoin = this._context.queryBuilder.IsSingle()==false;
+            var isJoin = this._context.queryBuilder?.IsSingle()==false;
             var shortName = ((ParameterExpression)expr)?.Name;
             var joinInfo = this._context.queryBuilder.JoinQueryInfos.FirstOrDefault(it => it.ShortName.EqualCase(shortName));
             var isObj = false;