-

OrmTest/Demo/Query.cs

@@ -103,13 +103,19 @@ namespace OrmTest.Demo
         public static void Join()
         {
             var db = GetInstance();
-            //join 
+            //join  2
             var list = db.Queryable<Student, School>((st, sc) => new object[] {
               JoinType.Left,st.SchoolId==sc.Id
             }).ToList();
 
+            //join  3
+            var list2 = db.Queryable<Student, School,Student>((st, sc,st2) => new object[] {
+              JoinType.Left,st.SchoolId==sc.Id,
+              JoinType.Left,st.SchoolId==st2.Id
+            }).ToList();
+
             //join return List<dynamic>
-            var list2 = db.Queryable<Student, School>((st, sc) => new object[] {
+            var list3 = db.Queryable<Student, School>((st, sc) => new object[] {
               JoinType.Left,st.SchoolId==sc.Id
             }).Select<Student,School,ViewModelStudent>((st,sc)=>new ViewModelStudent { Name= st.Name,SchoolId=sc.Id }).ToList();
         }

OrmTest/Models/Student.cs

@@ -16,7 +16,7 @@ namespace OrmTest.Models
         public int Id { get; set; }
         public int SchoolId { get; set; }
         public string Name { get; set; }
-        public DateTime CreateTime { get; set; }
+        public DateTime? CreateTime { get; set; }
         [SugarColumn(IsIgnore=true)]
         [NotMappedAttribute]
         public int TestId { get; set; }