Entity Framework - select group by, select max date

Question

I have a NoteBrief

public int Id { get; set; } 
public string Title { get; set; } 
public DateTime Created { get; set; }
public int ParentNoteId { get; s         


        

Answer 1

Entity Framework creating IQuerable of the most recent

This is what finally worked for me:

        return from e in _ctx.Notes
               group e by e.ParentNoteId into g
               select g.OrderByDescending(e => e.Created).FirstOrDefault() into r
               select new NoteBrief
               {
                   Id = r.Id,
                   Title = r.Title,
                   Created = r.Created,
                   ParentNoteId = r.ParentNoteId,
               };

Also edited my original post with correct query i was going for.

Thanks.

Answer 2

Try following

    return _ctx.Notes.Select(r => new NoteBrief
    {
        Id = r.Id,
        Title = r.Title,
        Created = r.Created,
        ParentNoteId = r.ParentNoteId,
    }).OrderBy(x=>x.Created).GroupBy(x=>new {Id=x.Id, Title=x.Title}).Select(x=>x.First()).AsQueryable();

}