EFCore 查詢和選擇

Question

嘿，我正在嘗試查詢並找到一個看起來像這樣的 object：

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();

我在這里要做的是：找到一個 ID 為 X 的 object，然后那個 ID 為 X 的 object 有一個結果列表，我想得到這個列表，但只有一個元素的 ID 為 result.Id。

我究竟做錯了什么？

編輯：使用這台 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

嘗試這個：

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));