node.js - 将 MongoStore 与 Express 一起使用时出错

Question

我尝试将 Express 应用程序的 session 存储在 MongoStore 中，但连接时出现错误。该错误是一个巨大的对象/JSON，我无法理解，所以我尝试了在网上找到的所有替代方案，但到目前为止没有运气......

这是应用程序配置:

var express = require('express'),
    MongoStore = require('connect-mongo')(express),
    passport = require('passport');

var app = express();

app.configure(function(){
    app.use(express.compress());
    app.use(express.static(path.join(__dirname, 'public')));
    app.set('views', __dirname + '/views');
    app.set('view engine', 'ejs');
    app.set('port', process.env.PORT || 8000);
    app.use(express.favicon(__dirname + '/public/img/favicon.ico'));
    app.use(express.logger('dev'));
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.cookieParser('secret'));
    app.use(express.session({
            secret: 'secret',
            store: new MongoStore({
                    db: dbOptions.db,
                    host: dbOptions.host,
                    port: dbOptions.port,
                    username: dbOptions.username,
                    password: dbOptions.password
            },
            function(err){
                    console.log(err || 'connect-mongodb setup ok');
            })
    }));
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(app.router);
});

app.configure('development', function(){
    app.use(express.errorHandler());
});

这是控制台中记录的错误:

{ db:
   { domain: null,
     _events: {},
     _maxListeners: 10,
     databaseName: 'dbname',
     serverConfig:
      { domain: null,
        _events: {},
        _maxListeners: 10,
        _callBackStore: [Object],
        _commandsStore: [Object],
        auth: [Object],
        _dbStore: [Object],
        host: 'ec2-xx-xxx-xxx-xx.eu-west-1.compute.amazonaws.com',
        port: 27017,
        options: [Object],
        internalMaster: true,
        connected: true,
        poolSize: 5,
        disableDriverBSONSizeCheck: false,
        _used: true,
        replicasetInstance: null,
        emitOpen: false,
        ssl: false,
        sslValidate: false,
        sslCA: null,
        sslCert: undefined,
        sslKey: undefined,
        sslPass: undefined,
        serverCapabilities: [Object],
        name: 'ec2-xx-xx-xxx-xx.eu-west-1.compute.amazonaws.com:27017',
        _readPreference: null,
        socketOptions: [Object],
        logger: [Object],
        eventHandlers: [Object],
        _serverState: 'connected',
        _state: [Object],
        recordQueryStats: false,
        socketTimeoutMS: [Getter/Setter],
        db: [Circular],
        dbInstances: [Object],
        connectionPool: [Object],
        isMasterDoc: [Object] },
     options: { w: 1 },
     _applicationClosed: false,
     slaveOk: false,
     bufferMaxEntries: -1,
     native_parser: undefined,
     bsonLib:
      { Code: [Function: Code],
        Symbol: [Function: Symbol],
        BSON: [Object],
        DBRef: [Function: DBRef],
        Binary: [Object],
        ObjectID: [Object],
        Long: [Object],
        Timestamp: [Object],
        Double: [Function: Double],
        MinKey: [Function: MinKey],
        MaxKey: [Function: MaxKey],
        promoteLongs: true },
     bson: { promoteLongs: true },
     bson_deserializer:
      { Code: [Function: Code],
        Symbol: [Function: Symbol],
        BSON: [Object],
        DBRef: [Function: DBRef],
        Binary: [Object],
        ObjectID: [Object],
        Long: [Object],
        Timestamp: [Object],
        Double: [Function: Double],
        MinKey: [Function: MinKey],
        MaxKey: [Function: MaxKey],
        promoteLongs: true },
     bson_serializer:
      { Code: [Function: Code],
        Symbol: [Function: Symbol],
        BSON: [Object],
        DBRef: [Function: DBRef],
        Binary: [Object],
        ObjectID: [Object],
        Long: [Object],
        Timestamp: [Object],
        Double: [Function: Double],
        MinKey: [Function: MinKey],
        MaxKey: [Function: MaxKey],
        promoteLongs: true },
     _state: 'connected',
     pkFactory:
      { [Function: ObjectID]
        index: 16051204,
        createPk: [Function: createPk],
        createFromTime: [Function: createFromTime],
        createFromHexString: [Function: createFromHexString] },
     forceServerObjectId: false,
     safe: false,
     notReplied: {},
     isInitializing: true,
     openCalled: true,
     commands: [],
     logger: { error: [Function], log: [Function], debug: [Function] },
     tag: 1387402758191,
     eventHandlers:
      { error: [],
        parseError: [],
        poolReady: [],
        message: [],
        close: [] },
     serializeFunctions: false,
     raw: false,
     recordQueryStats: false,
     retryMiliSeconds: 1000,
     numberOfRetries: 60,
     readPreference: undefined },
  collectionName: 'sessions',
  internalHint: null,
  opts: {},
  slaveOk: false,
  serializeFunctions: false,
  raw: false,
  readPreference: 'primary',
  pkFactory:
   { [Function: ObjectID]
     index: 16051204,
     createPk: [Function: createPk],
     createFromTime: [Function: createFromTime],
     createFromHexString: [Function: createFromHexString] },
  serverCapabilities: undefined }

它非常晦涩，所以我不知道应该朝哪个方向搜索。

编辑1:

好的，谢谢，现在更有意义了，但问题是我试图记录一个错误，因为 session 没有存储在 MongoDB 中，我不明白为什么。我在 MongoStore 的设置周围添加了一个 try catch block ，以查看是否触发了错误，但没有错误，所以我不知道为什么它不起作用......

这是 Passportjs 存储和检索 session 的方式:

passport.serializeUser(function(user, done) {
    done(null, user._id);
});

passport.deserializeUser(function(_id, done) {
    var userProvider = new UserProvider();
    userProvider.findUser({ _id: _id }, function (err, users) {
            if(users.length > 0) { done(null, users[0]); }
            else { done(err, null); }
    });
 });

我错过了什么？

感谢您的帮助!

Answer 1

您的问题在以下行中:

store: new MongoStore({
  db: dbOptions.db,
  host: dbOptions.host,
  port: dbOptions.port,
  username: dbOptions.username,
  password: dbOptions.password
},
function(err){
  console.log(err || 'connect-mongodb setup ok');
})

只需删除最后一个函数，我相信它应该按照您最初的预期工作

与 Andrei 的回答相反，MongoStore 构造函数确实接受回调。然而它并不是为了错误处理的目的 - 它实际上传回 MongoStore 的集合属性(这就是为什么 console.log 会输出它所做的事情)。如果出现错误，MongoStore 将简单地抛出错误。可以在源码中找到by clicking here 。回调在第 164 行调用。