diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/MappingFieldsHelper.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/MappingFieldsHelper.cs
index 3e6f7ba01..a5f915ecb 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/MappingFieldsHelper.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/MappingFieldsHelper.cs
@@ -29,7 +29,7 @@ namespace SqlSugar
             return mappingFields;
         }
 
-        public List<IConditionalModel> GetMppingSql(List<T> list, List<MappingFieldsExpression>  mappingFieldsExpressions)
+        public List<IConditionalModel> GetMppingSql(List<object> list, List<MappingFieldsExpression>  mappingFieldsExpressions)
         {
             List<IConditionalModel> conditionalModels = new List<IConditionalModel>();
             foreach (var model in list) 
@@ -141,9 +141,26 @@ namespace SqlSugar
             {
                 item.LeftEntityColumn = this.NavEntity.Columns.FirstOrDefault(it => it.PropertyName == leftName);
             }
-            if (item.RightEntityColumn == null)
+            if (item.RightEntityColumn == null && this.Context != null)
             {
-                item.RightEntityColumn = this.RootEntity.Columns.FirstOrDefault(it => it.PropertyName == rightName);
+                if (item.RightColumnExpression is LambdaExpression) 
+                {
+                    var body=(item.RightColumnExpression as LambdaExpression).Body;
+                    if (body is UnaryExpression) 
+                    {
+                        body = ((UnaryExpression)body).Operand;
+                    }
+                    if (body is MemberExpression) 
+                    {
+                        var exp=(body as MemberExpression).Expression;
+                        if (exp.NodeType == ExpressionType.Parameter) 
+                        {
+                            item.RightEntityColumn =this.Context.EntityMaintenance.GetEntityInfo(exp.Type).Columns.FirstOrDefault(it => it.PropertyName == rightName);
+                        }
+                    }
+                }
+                if (item.RightEntityColumn==null)
+                   item.RightEntityColumn = this.RootEntity.Columns.FirstOrDefault(it => it.PropertyName == rightName);
             }
         }
 
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
index c5b11d47d..b41c19352 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/NavigatManager.cs
@@ -243,6 +243,7 @@ namespace SqlSugar
                         if (sql.MappingExpressions.HasValue())
                         {
                             MappingFieldsHelper<T> helper = new MappingFieldsHelper<T>();
+                            helper.Context = this.Context;
                             helper.NavEntity = bEntityInfo;
                             helper.RootEntity = this.Context.EntityMaintenance.GetEntityInfo<T>();
                             helper.SetChildList(navObjectNameColumnInfo, listItem, ilist.Cast<object>().ToList(), sql.MappingExpressions);
@@ -319,6 +320,7 @@ namespace SqlSugar
                         {
                             MappingFieldsHelper<T> helper = new MappingFieldsHelper<T>();
                             helper.NavEntity = navEntityInfo;
+                            helper.Context = this.Context;
                             helper.RootEntity = this.Context.EntityMaintenance.GetEntityInfo<T>();
                             helper.SetChildList(navObjectNameColumnInfo, item,setValue,sqlObj.MappingExpressions);
                         }
@@ -350,7 +352,7 @@ namespace SqlSugar
                 helper.Context = this.Context;
                 helper.NavEntity = navEntityInfo;
                 helper.RootEntity = this.Context.EntityMaintenance.GetEntityInfo<T>();
-                var whereSql = helper.GetMppingSql(RootList,sqlObj.MappingExpressions);
+                var whereSql = helper.GetMppingSql(list, sqlObj.MappingExpressions);
                 var navList = selector(this.Context.Queryable<object>().AS(navEntityInfo.DbTableName).AddParameters(sqlObj.Parameters).Where(whereSql,true).WhereIF(sqlObj.WhereString.HasValue(), sqlObj.WhereString).Select(sqlObj.SelectString).OrderByIF(sqlObj.OrderByString.HasValue(), sqlObj.OrderByString));
                 if (navList.HasValue())
                 {
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index e2ce038a5..1a782b08d 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -1448,7 +1448,7 @@ namespace SqlSugar
                RightEntityColumn=rightEntity.Columns.First(it=>it.PropertyName==ExpressionTool.GetMemberName(mappingFiled2))
              }
             };
-            var conditionals=fieldsHelper.GetMppingSql(list, mappings);
+            var conditionals=fieldsHelper.GetMppingSql(list.Cast<object>().ToList(), mappings);
             if (queryableContext.TempChildLists == null)
                 queryableContext.TempChildLists = new Dictionary<string, object>();
             if (list != null && queryableContext.TempChildLists.ContainsKey(key))
@@ -1542,7 +1542,7 @@ namespace SqlSugar
                RightEntityColumn=rightEntity.Columns.First(it=>it.PropertyName==ExpressionTool.GetMemberName(mappingFiled2))
              }
             };
-            var conditionals = fieldsHelper.GetMppingSql(list, mappings);
+            var conditionals = fieldsHelper.GetMppingSql(list.Cast<object>().ToList(), mappings);
             if (queryableContext.TempChildLists == null)
                 queryableContext.TempChildLists = new Dictionary<string, object>();
             if (list != null && queryableContext.TempChildLists.ContainsKey(key))