Update Core

Src/Asp.NetCore2/SqlSugar/Abstract/InsertableProvider/SplitInsertable.cs

@@ -215,8 +215,11 @@ namespace SqlSugar
             {
                 if (!this.Context.DbMaintenance.IsAnyTable(item.Key, false)) 
                 {
-                    this.Context.MappingTables.Add(EntityInfo.EntityName, item.Key);
-                    this.Context.CodeFirst.InitTables<T>();
+                    if (item.Value != null)
+                    {
+                        this.Context.MappingTables.Add(EntityInfo.EntityName, item.Key);
+                        this.Context.CodeFirst.InitTables<T>();
+                    }
                 }
             }
             this.Context.Ado.IsEnableLogEvent = isLog;

Src/Asp.NetCore2/SqlSugar/IntegrationServices/SplitTableService.cs

@@ -65,6 +65,10 @@ namespace SqlSugar
             }
             else
             {
+                if (entityValue == null) 
+                {
+                    return null;
+                }
                 var value = splitColumn.PropertyInfo.GetValue(entityValue, null);
                 if (value == null)
                 {