EFCore 查询和选择

Question

Hey I am trying to query and find a object that looks something like this:

I have already result 
I have id that is quiz id.

So i have both Ids.


var singlequiz = await _context.Quizzes
                .Include(q => q.Questions)
                    .ThenInclude(question => question.Options)
                .Include(qz => qz.Results)
                    .Where(b => b.Id == id)
                .Select(c => c.Results.Select(z => z.Id == result.Id))
                .FirstOrDefaultAsync();

What I am trying to do here is: find an object with id X, then that object with id X has a list of results, I want to get the list, BUT with only the one element that has id of result.Id.

What am i doing wrong?

EDIT: Used this ATM

 var singlequiz = await _context.Quizzes
                .Include(x => x.Questions)
                    .ThenInclude(x => x.Options)
                .Include(x => x.Results)
                .FirstOrDefaultAsync(x => x.Id == id);

            var singleQuizElement = singlequiz.Results.Where(x => x.Id == result.Id).ToList();


            singlequiz.Results = singleQuizElement;

Answer 1

Try this:

var singlequiz = await _context.Quizzes
                .Include(x => x.Questions)
                    .ThenInclude(x => x.Options)
                .Include(x => x.Results)
.FirstOrDefaultAsync(x=> x.Id == id && x.Results.Any(y => y.Id == result.Id));