DO 5.0.18

AsQueryable for Xtensive.Orm.Linq.Grouping lead to exception

Fixing would be preferable or at least more specific exception.


internal class Program
    private static void Main(string[] args)
        var dc = new DomainConfiguration("sqlserver", "Data Source=.; Initial Catalog=DO40-Tests; Integrated Security=True;");


        dc.UpgradeMode = DomainUpgradeMode.Recreate;

        using (var d = Domain.Build(dc))
            using (var s = d.OpenSession())
            using (s.Activate())
            using (s.OpenTransaction())
                new TestEntity(s)
                    Name = "test"

                var groups = Query.All<TestEntity>().GroupBy(it => it.Name);

                foreach (var group in groups)
                    _ = group.Select(it => it.Id).ToArray();
                    _ = group.AsEnumerable().Select(it => it.Id).ToArray();
                    _ = group.AsQueryable().Select(it => it.Id).ToArray(); //Exception

    public class TestEntity : Entity
        /// <summary>Initializes a new instance of this class.</summary>
        /// <param name="session">The session.</param>
        public TestEntity(Session session) : base(session)

        [Field(Nullable = false)]
        public int Id { get; private set; }

        public string Name { get; set; }

Exception can be different

In test thrown 'Value for parameter 'groupingParameter' is not set.'

In other project thrown 'ArgumentException: must be reducible node'

asked Feb 03 '20 at 07:54

Gushchin%20Anton's gravatar image

Gushchin Anton

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