Update demo

Src/Asp.NetCore2/SqlSeverTest/PgSqlTest/Models/Order.cs

@@ -0,0 +1,24 @@
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace OrmTest
+{
+
+    public class Order
+    {
+        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        public int Id { get; set; }
+
+        public string Name { get; set; }
+        public decimal Price { get; set; }
+        [SugarColumn(IsNullable = true)]
+        public DateTime CreateTime { get; set; }
+        [SugarColumn(IsNullable =true)]
+        public int CustomId { get; set; }
+        [SugarColumn(IsIgnore = true)]
+        public List<OrderItem> Items { get; set; }
+    }
+}