mongoosefindOnecallback给我null

在下面的代码中，obj在findOnecallback中接收null。 不明白为什么。 在我的数据库中，它看起来像这样。

MongoDB shell version: 2.2.0 connecting to: test > use test switched to db test > db.Restaurant.findOne(); { "_id" : ObjectId("53372f9714b4d69cbfa2bbaf"), "name" : "Printz", "visit" : "2014-04-02 19:00:00" } 

代码app.js

 /** * Module dependencies. */ var express = require('express'); var http = require('http'); var path = require('path'); var moment = require('moment'); var mongoose = require('mongoose'); var app = express(); app.set('port', process.env.PORT || 3000); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'ejs'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.json()); app.use(express.urlencoded()); app.use(express.methodOverride()); app.use(app.router); app.use(express.static(path.join(__dirname, 'public'))); // development only if ('development' == app.get('env')) { app.use(express.errorHandler()); } var connection = mongoose.connection; connection.on('error', console.error); connection.once('open', function() { console.log("open!"); }); console.log("Open database") mongoose.connect('mongodb://localhost/test'); var eventSchema = new mongoose.Schema({ name: String, visit: Date }); var Restaurant = mongoose.model('Restaurant', eventSchema); app.get('/', function(req, res) { Restaurant.findOne({}, function(err, obj) { if (err || !obj) { res.send(500); console.log("error: " + err + ", obj: " + obj); return; } console.log("obj: " + obj); res.render('index', { name: obj.name }); }); }); http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); }); 

Answer 1

另一个mongoose自动复制收集名称的受害者。 mongoose正在查询集合“餐馆”而不是“餐馆”。

 var eventSchema = new mongoose.Schema({ name: String, visit: Date }, {collection: 'Restaurant'}); //override default collection name var Restaurant = mongoose.model('Restaurant', eventSchema); 

有关详细信息，请参阅mongoose.Model和util.toCollectionName上的文档 。