Get Distinct Entries Based On Specific Column in Entity Framework

Question

I have a SQLite table that contains every test result we\'ve run, and I\'m looking to write an entity framework query that returns only the most recent test result per project.

Answer 1

Try with a subquery instead of a grouping. Like this:

results = await _context.Results
            .Include(x => x.Project)
            .AsNoTracking() 
            .Where( r => r.Id == _context.Results.Where( rr => rr.ProjectId == r.ProjectID).Max( rr => rr.Id) )
            .ToListAsync();