Add unit test

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/Main.cs

@@ -1,4 +1,5 @@
-using SqlSeverTest.UserTestCases;
+using Demo;
+using SqlSeverTest.UserTestCases;
 using SqlSugar;
 using System;
 using System.Collections.Generic;
@@ -31,6 +32,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitSelectN.Init();
             UnitSubqueryN.Init();
             Unitadfasfa.Init();
             UnitOneToMany1231123.Init();

Src/Asp.NetCore2/SqlSeverTest/UserTestCases/UnitTest/UnitSelectN.cs

@@ -0,0 +1,108 @@
+using OrmTest;
+using SqlSugar;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Demo
+{
+    /// <summary>
+    /// 数据库帮助类
+    /// </summary>
+    public class UnitSelectN
+    { 
+
+        public static void Init()
+        {
+            var Db = NewUnitTest.Db;
+            Db.CodeFirst.InitTables(typeof(UpFile), typeof(SpShangPin));
+
+            int total = 0;
+            Test0(Db, total);
+            total = Test1(Db, total);
+        }
+        private static int Test0(SqlSugarClient Db, int total)
+        {
+            var list = Db.Queryable<SpShangPin>() 
+                            
+                            .Select(s => new ShangPinView()
+                            {
+                                
+                                Image = new UploadFile() { Id = s.FileId, Url = s.Image.FilePath } 
+                               
+                            }).ToList();
+            return total;
+        }
+        private static int Test1(SqlSugarClient Db, int total)
+        {
+            var list = Db.Queryable<SpShangPin>()
+                            .Includes(s => s.Image)
+                            .Select(s => new ShangPinView()
+                            {
+                                Id = s.Id,
+                                Name = s.Name,
+                                Price = s.Price,
+
+                                Image = new UploadFile() { Id = s.FileId, Url = s.Image.FilePath },
+                                FileName = s.Image.FilePath,
+                                File = s.Image,
+                                //Image = s.Image == null ? null : new UploadFile() { Id = s.FileId, Url = s.Image == null ? "" : s.Image.FilePath }
+                            }).ToPageList(1, 2, ref total);
+            return total;
+        }
+    }
+
+    /// <summary>
+    /// 商品表
+    /// </summary>
+    public class SpShangPin : Base
+    {
+        public string Name { get; set; }
+        public int Price { get; set; }
+
+        public Guid FileId { get; set; }
+
+        [Navigate(NavigateType.OneToOne, nameof(FileId), nameof(UpFile.Id))]
+        public UpFile Image { get; set; }
+    }
+
+    /// <summary>
+    /// 上传文件表
+    /// </summary>
+    public class UpFile : Base
+    {
+        public string FileName { get; set; }
+        public string FilePath { get; set; }
+    }
+
+    /// <summary>
+    /// 表公共字段
+    /// </summary>
+    public class Base
+    {
+        [SugarColumn(IsPrimaryKey = true)]
+        public Guid Id { get; set; }
+        public DateTime AddTime { get; set; }
+        public DateTime UpdateTime { get; set; }
+        public bool IsDel { get; set; }
+    }
+
+    public class ShangPinView
+    {
+        public Guid Id { get; set; }
+        public string Name { get; set; }
+        public int Price { get; set; }
+        public UploadFile Image { get; set; }
+        public UpFile File { get; set; }
+        public string FileName { get; set; }
+    }
+
+    public class UploadFile
+    {
+        [SugarColumn(IsPrimaryKey = true)]
+        public Guid Id { get; set; }
+        public string Url { get; set; }
+    }
+}