[英]EFCore Query and selection
嘿,我正在尝试查询并找到一个看起来像这样的 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();
我在这里要做的是:找到一个 ID 为 X 的 object,然后那个 ID 为 X 的 object 有一个结果列表,我想得到这个列表,但只有一个元素的 ID 为 result.Id。
我究竟做错了什么?
编辑:使用这台 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;
尝试这个:
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));
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