我在這里通過mongodb的ID來查詢數(shù)據(jù)我的步驟：1、引包var ObjectId = require('mongodb').ObjectId;2、ObjectId(_id)3、查詢但是我ObjectId(_id)包裝后的ID的值就改變了，不是包裝的前的ID了,查詢的結(jié)果也為空var?ObjectId?=?require('mongodb').ObjectId; exports.getArticleById?=?function?(req,res,next)?{ ????var?id=?req.query.id; ????var?_id?=??ObjectId(_id); ???? ????console.log(id); ????console.log(typeof(id)); ????console.log("包裝后的ID："+_id); ????console.log(typeof(_id)); ???? ????db.find("article",?{"id":?_id},?function?(err,?result)?{ ????????if?(err)?{ ????????????res.send("文章被刪除");? ????????????return ????????} ????????console.log(result); ????}); ????res.render('article/article',?{ ????????"login":?req.session.login?==?"1"???true?:?false, ????????"username":?req.session.login?==?"1"???req.session.username?:?"" ????}); };這是結(jié)果：有毒，這里哪里用錯了嗎？然后我換mongoose來轉(zhuǎn)就成功了,數(shù)據(jù)也拿到了var?mongoose?=?require('mongoose'); var?_id?=?mongoose.Types.ObjectId(id);