test for issue #4390

Tests/Linq/UserTests/Issue4390Tests.cs

@@ -0,0 +1,66 @@
+using System.Linq;
+using FluentAssertions;
+using LinqToDB;
+using LinqToDB.Mapping;
+using NUnit.Framework;
+using System.Linq.Dynamic.Core;
+using System.Linq.Dynamic.Core.CustomTypeProviders;
+using System.Collections.Generic;
+using System;
+
+namespace Tests.UserTests
+{
+ [TestFixture]
+ public class Issue4390Tests : TestBase
+ {
+ [Table]
+ public class InfeedAdviceDTO
+ {
+ [Column] public int Id { get; set; }
+ }
+
+ [Table]
+ public class InventoryResourceDTO
+ {
+ [Column] public int InfeedAdviceID { get; set; }
+ }
+ public class MlogCombined1
+ {
+ public InfeedAdviceDTO? InfeedAdvice { get; set; }
+
+ public int? Count { get; set; }
+ }
+
+ public class MlogCombined2
+ {
+ public MlogCombined1? MlogCombined1 { get; set; }
+ }
+
+ [Test]
+ public void Issue4390Test([IncludeDataSources(TestProvName.AllSQLite)] string context)
+ {
+ using (var db = GetDataContext(context))
+ using (db.CreateLocalTable<InfeedAdviceDTO>())
+ using (db.CreateLocalTable<InventoryResourceDTO>())
+ {
+ db.Insert(new InventoryResourceDTO() { InfeedAdviceID = 1 });
+ db.Insert(new InfeedAdviceDTO() { Id = 1 });
+
+ var irs = from ir in db.GetTable<InventoryResourceDTO>() select ir;
+
+ var qry = from infeed in db.GetTable<InfeedAdviceDTO>()
+ join inventory in db.GetTable<InventoryResourceDTO>() on infeed.Id equals inventory.InfeedAdviceID
+ select new MlogCombined2
+ {
+ MlogCombined1 = new MlogCombined1
+ {
+ InfeedAdvice = infeed,
+ Count = irs.Count(x => x.InfeedAdviceID == infeed.Id),
+ }
+ };
+
+ var l = qry.Where(x => x.MlogCombined1 != null).Count();
+ }
+ }
+ }
+}