TypeError：无法读取未定义的属性'databaseName'
我一直把头撞在墙上。 我一直在做基本的Node.js lynda.com tutorail，我卡在这一点上。
当我键入nodemon server.js我得到错误。 我遇到了在node.js中导出数据库连接的问题 任何提示？ 有没有更好的debugging方法，然后在Node中进行更改和刷新？
/Users/khebert/Sites/node/airline/node_modules/connect-mongo/lib/connect-mongo.js:87 this.db = new mongo.Db(options.mongoose_connection.db.databaseName, ^ TypeError: Cannot read property 'databaseName' of undefined at new MongoStore (/Users/khebert/Sites/node/airline/node_modules/connect-mongo/lib/connect-mongo.js:87:60) at module.exports (/Users/khebert/Sites/node/airline/app.js:22:10) at Object.<anonymous> (/Users/khebert/Sites/node/airline/server.js:4:27) at Module._compile (module.js:456:26) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:901:3 2 Jan 08:04:56 - [nodemon] app crashed - waiting for file changes before starting... db.js
var mongoose = require('mongoose'); mongoose.connect('mongodb://localhost/flights', function(err) { if (err) console.log(err); else console.log('DB success'); }); module.exports = mongoose.connections;
server.js
var http = require('http'), flights = require('./data'), db = require('./db'), app = require('./app.js')(flights, db); http.createServer(app).listen(app.get('port'), function(){ console.log('Express server listening on port ' + app.get('port')); });
app.js
module.exports = function(flights, db) { /** * Module dependencies. */ var express = require('express'); var MongoStore = require('connect-mongo')(express); var routes = require('./routes')(flights); var path = require('path'); var app = express(); // all environments app.set('port', process.env.PORT || 3000); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.cookieParser()); app.use(express.session({ secret: 'keyboard cat', store: new MongoStore({ mongoose_connection: db }) })); app.use(express.bodyParser()); app.use(express.methodOverride()); app.use(function (req, res, next) { res.set('X-Powerd-By','Flight Tracker'); next(); }); app.use(app.router); app.use(express.static(path.join(__dirname, 'public'))); // development only if ('development' === app.get('env')) { app.use(express.errorHandler()); } app.get('/flight/:number', routes.flight); app.put('/flight/:number/arrived', routes.arrived); app.get('/list', routes.list); app.get('/arrivals', routes.arrivals); return app; };
在db.js中，
module.exports = mongoose.connections;
改成：
module.exports = mongoose.connections[0];
这可能是'express.bodyParser（）'的问题，你必须在应用程序的所有configuration之后定义连接。
你可以重用已经由mongoose实例化的db对象！
new MongoStore({ db: mongoose.connection.db })