Add demo

Src/Asp.NetCore2/MongoDbTest/UnitTest/LongPrimaryKey.cs

@@ -0,0 +1,54 @@
+using SqlSugar.MongoDb;
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MongoDbTest 
+{
+    internal class LongPrimaryKey
+    {
+        public static void Init() 
+        {
+            var db = DbHelper.GetNewDb();
+            db.DbMaintenance.TruncateTable<Student>();
+            var id=db.Insertable(new Student()
+            {
+                Name="a"
+                 
+            }).ExecuteReturnSnowflakeId();
+
+            var data=db.Queryable<Student>().Where(it => it.Id == id).ToList();
+            if (data.First().Id != id) Cases.ThrowUnitError();
+            data.First().Name = "a2";
+            db.Updateable(data).ExecuteCommand();
+            var data2 = db.Queryable<Student>().Where(it => it.Id == id).ToList();
+            if (data.First().Name !="a2") Cases.ThrowUnitError();
+            Console.WriteLine(db.Queryable<Student>().Count());
+            db.Deleteable<Student>().Where(it=>it.Id==id).ExecuteCommand();
+            if(db.Queryable<Student>().Count()!=0) Cases.ThrowUnitError();
+            id = db.Insertable(new Student()
+            {
+                Name = "a" 
+            }).ExecuteReturnSnowflakeId();
+            var rows=db.Deleteable<Student>().Where(it => new long[] { id}.Contains(it.Id)).ExecuteCommand();
+            if (db.Queryable<Student>().Count() != 0) Cases.ThrowUnitError();
+            id = db.Insertable(new Student()
+            {
+                Name = "a"
+            }).ExecuteReturnSnowflakeId();
+            var row2=db.Deleteable<Student>(new Student() { Id=id}).ExecuteCommand();
+            if (db.Queryable<Student>().Count() != 0) Cases.ThrowUnitError();
+        }
+
+        [SqlSugar.SugarTable("UnitStutsdsdfr5fazzz1")]
+        public class Student  
+        {
+            [SqlSugar.SugarColumn(IsPrimaryKey =true,ColumnName ="_id")]
+            public long Id { get; set; }
+            public string Name { get; set; }
+        }
+    }
+}