Node.js Winston记录器文件名错误未定义

我是node js新手，正在为我的项目尝试winston logger，一切正常，但当我尝试创建自己的logger对象并将日志传输到文件名时，我收到的错误为：TypeError:无法读取未定义的属性“filename” 我觉得我做了一些愚蠢的事情，因为当我简单地尝试使用winston默认对象将日志写入文件时，我发布了带有错误快照的代码

我创建了simple express js项目，并在app.js中编写了如下日志代码：

/**
 * Module dependencies.
 */

var express = require('express'), routes = require('./routes'), user = require('./routes/user'), http = require('http'), 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.bodyParser());
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());
}

app.get('/', routes.index);
app.get('/users', user.list);

// adding winston logger code--------------------
var winston = require('winston');
/*
 * winston.add(winston.transports.File, { filename: 'winstonLogs.log' });
 * 
 * winston.log('info', 'Hello distributed log files!'); winston.info('Hello
 * again distributed logs');
 * 
 * winston.level = 'debug'; winston.log('debug', 'Now my debug messages are
 * written to console!');
 * 
 * //winston.remove(winston.transports.Console);
 */
// ******************************************************************************


var logger = new (winston.Logger)({
      transports: [
        new (winston.transports.File)({
          name: 'info-file',
          filename: 'filelog-info.log',
          level: 'info'
        }),
        new (winston.transports.File)({
          name: 'error-file',
          filename: 'filelog-error.log',
          level: 'error'
        })
      ]
    });
logger.add(winston.transports.File);


logger.log('info', 'Hello distributed log files!');
logger.info('Hello again distributed logs');

//logger.add(winston.transports.File).remove(winston.transports.Console);

// ending winston logger code--------------------

http.createServer(app).listen(app.get('port'), function() {
    console.log('Express server listening on port ' + app.get('port'));
});

我注释掉的代码正在运行

---

提前谢谢。

事实上，我添加了本不应该在那里的行

logger.add(winston.transports.File);

移除后，它开始正常工作