[IGNITE-19260] .NET: Thin 3.0: Support nested MemberInit projections in LINQ

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: platforms
• Labels: .NET LINQ ignite-3
• Assignee: Sergey Stronchinskiy
• Reporter: Sergey Stronchinskiy
• Created: 08/Apr/23 13:35
• Updated: 08/Apr/23 13:39

Description

Support nested member init projections:

 

[Test]
public void TestSelectMemberInitSupportsFields1()
{
	var res = PocoView.AsQueryable()
		.Where(x => x.Key == 2)
		.Select(x => new MyClass1
		{
			Key = x.Key,
			Class2Prop = new MyClass2
			{
				Value = x.Val
			}
		})
		.ToArray();

	Assert.AreEqual(1, res.Length);
	var resRow = res[0];
}

private class MyClass1
{
	public long Key { get; set; }

	public MyClass2 Class2Prop { get; set; } = null!;
}

private class MyClass2
{
	public string? Value { get; set; }
}

Also check possibility to combine with anonymous types.

Issue Links

• is caused by: IGNITE-18120 .NET: Thin 3.0: Allow arbitrary MemberInit projections in LINQ