通过ObjectID express js查找用户

我试图通过MongoDB的ObjectId来search用户，但结果很差。

App.js：

var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); // Database var mongo = require('mongodb'); var monk = require('monk'); var db = monk('localhost:27017/ePoi'); var routes = require('./routes/index'); var eppoi = require('./routes/eppoi'); var poi = require('./routes/poi'); var user= require('./routes/user'); var trip = require('./routes/trip'); var app = express(); // view engine setup app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); // uncomment after placing your favicon in /public //app.use(favicon(__dirname + '/public/favicon.ico')); app.use(logger('dev')); app.use(bodyParser.json()); app.use(bodyParser.urlencoded({ extended: false })); app.use(cookieParser()); app.use(express.static(path.join(__dirname, 'public'))); // Make our db accessible to our router app.use(function(req,res,next){ req.db = db; next(); }); app.use('/', routes); app.use('/eppoi', eppoi); app.use('/poi', poi); app.use('/user', user); app.use('/trip', trip); // catch 404 and forward to error handler app.use(function(req, res, next) { var err = new Error('Not Found'); err.status = 404; next(err); }); // error handlers // development error handler // will print stacktrace if (app.get('env') === 'development') { app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: err }); }); } // production error handler // no stacktraces leaked to user app.use(function(err, req, res, next) { res.status(err.status || 500); res.render('error', { message: err.message, error: {} }); }); module.exports = app; 

user.js的：

 /** * Created by Matteo on 15/07/2015. */ var express = require('express'); var router = express.Router(); ObjectID = require('mongodb').ObjectID; var db; //USER /* Visualizzo gli utenti */ router.get('/userlist', function(req, res) { db = req.db; var collection = db.get('user'); collection.find({},{},function(e,docs){ res.json(docs); }); }); /* * POST Inserisce i poi ricevuti da foursquare nella collection poilist */ router.post('/adduser', function(req, res) { db = req.db; var userdb={}; var user=req.body; //dati personali utente var nome=user.nome; var cognome=user.cognome; var email=user.email; var sesso=user.sesso; var residenza=user.residenza; var datanascita=user.datanascita; var id_fb=user.id_fb; var preferiti=user.preferiti; var tipo_di_viaggio=user.tipo_di_viaggio; //array con gli indici dei percorsi var id_trip= user.id_trip; //preferenze utente var likeCount=user.likeCount; var macro=Object.keys(likeCount); var dbLikeCount={}; var microCont={}; for(var i=0; i<macro.length; i++){ var micro=Object.keys(likeCount[macro[i]]); for(var j=0; j<micro.length; j++){ var contenuto=likeCount[macro[i]]; var like=(contenuto[micro[j]]).like; var dislike=(contenuto[micro[j]]).dislike; var poilike=Object.keys((contenuto[micro[j]]).poilike); var poidislike=Object.keys((contenuto[micro[j]]).poidislike); microCont[micro[j]]={"like":like, "dislike":dislike, "poilike":poilike, "poidislike":poidislike}; } dbLikeCount[macro[i]]=microCont; } //creazione dell'utente che sarà poi inserito nel db userdb={"nome":nome, "cognome":cognome, "email": email, "sesso":sesso, "residenza":residenza, "datanascita":datanascita, "id_fb":id_fb, "id_trip":id_trip, "likeCount":dbLikeCount, "preferiti": preferiti}; console.log(JSON.stringify(userdb)); //inserimento utente nel db var collection = db.get('user'); collection.insert(userdb, function(err, result){ res.send( (err === null) ? { msg: '' } : { msg: err } ); }); }); /* USER BY NAME */ router.get('/:name', function(req, res) { db = req.db; var name=req.params.name; console.log(name); var collection = db.get('user'); collection.find({"nome":name},function(e,docs){ res.json(docs); }); }); /* USER BY ID */ router.get('/:id', function(req, res) { db = req.db; var newObjectId = new ObjectID(req.params.id) console.log(newObjectId); var collection = db.get('user'); collection.find({"_id": newObjectId},{},function(e,docs){ res.json(docs); }); }); module.exports = router; 

client.js

 $("#btnUserById").on('click', userById); function userById(){ var id="55a3e3337b2f33a45bad7c3b"; // Use AJAX to post the object to our adduser service $.ajax({ contentType: 'application/json', type: 'GET', async:true, url: '/user/' + id, dataType: 'JSON' }).done(function(response) { console.log(JSON.stringify(response)); }); } 

我试图传递一个在数据库上的ID，我想查找与objectid这一步的用户，但我的查询的结果是：[]，即使在数据库中存在用户与此ID。

Answer 1

您似乎使用相同的端点来查询名称和ID。

而是尝试修改查询端点，如下所示：

router.get('/:id', function(req, res) { .. }

至

router.get('/id/:id', function(req, res) { .. }

和

router.get('/:id', function(req, res) { .. }

至

router.get('/name/:name', function(req, res) { .. }

较老，短视的答案

如果你使用的mongodb没有任何ORM（例如mongoose，水线等），你需要首先将idstring转换为ObjectID。

 var ObjectID = require('mongodb').ObjectID; objId = new ObjectID(idString); 

然后searchobjId。 让我们知道这是否有帮助。