Class.findOne({ name: 'Grade 5 - Section A'})
.populate('scores.studentId')
.exec(function(err, class) {
if (err) throw err;
//Now class.scores.studentId becomes ObjectStudent
//hence you have all scores for all students
});
Class.findOneAndUpdate({name: 'Grade 5 - Section A'
,'scores.studentId': ObjectId('5776bd36ffc8227405d364d2')
, 'scores.performance.subjectId' : ObjectId('577694ecbf6f3a781759c54a')}
, {$set: {scores.performance. score: 50}}
, function(err, data) {
if (err) throw err
});
希望对您有所帮助
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