Mongodb 猫鼬是怎么做的

如何在评论中找到评论

comments: [{
    nickName: {type: String, required: true}, 
    comment: {type: String, required: true}, 
    commentUnders: [{
        nickName: {type: String, required: true}, 
        comment: {type: String, required: true}, 
    }]
}]

我试过了，但没用

Post.findOne({'comments._id' : req.body._idComment}, 
    {'comments._id': $elemMatch: req.body._idComment,
     'commentUnders._id': $elemMatch: req.body._idCommentUnders}, function(err, data) {
   console.log(data);
});

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您的评论文档中的“_id”在哪里？@JBone mongo默认创建了该文档。这一切都很好。