javascript - Node.js MySQL模块未连接到数据库

我正在尝试做一个简单的测试查询，以使节点mysql模块正常工作，但它未连接到数据库。
这是我在app.js中的代码：

var http    = require('http'),
io      = require('socket.io'),
sys     = require('sys'),
express = require('express'),
mysql = require('mysql'),
conn = mysql.createConnection({
    host:'localhost',
    port:'3000',
    user:'root',
    password:'pass',
    database:'some_database'
});

var port = 3000;

var app = express();

app.set('views', __dirname + '/views');
app.engine('html', require('ejs').renderFile);

app.get('/', function(req,res) {
        res.render('./index.html',{test:'Hello'});
});

app.get('/home', function(req,res) {
        res.render('./index.html');
});

var chat_log = new Array();

var socket = io.listen(http.createServer(app).listen(port));

if(conn.connect()){console.log('yay');}else{console.log('whyyyy');};

console.log(conn);

conn.query('SELECT 1 + 1 AS solution', function(err, rows, fields) {
  if (err) throw err;

  console.log('The solution is: ', rows[0].solution);
});

conn.end();

console.log（conn）返回以下内容：

{ domain: null,
  _events: {},
  _maxListeners: 10,
  config:
   { host: 'localhost',
     port: '3000',
     socketPath: undefined,
     user: 'root',
     password: 'snareline1',
     database: 'test',
     insecureAuth: false,
     supportBigNumbers: false,
     bigNumberStrings: false,
     debug: undefined,
     timezone: 'local',
     flags: '',
     queryFormat: undefined,
     pool: undefined,
     multipleStatements: false,
     typeCast: true,
     maxPacketSize: 0,
     charsetNumber: 33,
     clientFlags: 193487 },
  _socket:
   { _connecting: true,
     _handle:
      { fd: -1,
        writeQueueSize: 0,
        owner: [Circular],
        onread: [Function: onread] },
     _readableState:
      { highWaterMark: 16384,
        buffer: [],
        length: 0,
        pipes: null,
        pipesCount: 0,
        flowing: false,
        ended: false,
        endEmitted: false,
        reading: true,
        calledRead: true,
        sync: false,
        needReadable: true,
        emittedReadable: false,
        readableListening: false,
        objectMode: false,
        defaultEncoding: 'utf8',
        ranOut: false,
        awaitDrain: 0,
        readingMore: false,
        decoder: null,
        encoding: null },
     readable: true,
     domain: null,
     _events:
      { end: [Object],
        finish: [Function: onSocketFinish],
        _socketEnd: [Function: onSocketEnd],
        data: [Object],
        readable: [Function],
        connect: [Object],
        close: [Object],
        error: [Object],
        drain: [Function: ondrain] },
     _maxListeners: 10,
     _writableState:
      { highWaterMark: 16384,
        objectMode: false,
        needDrain: false,
        ending: false,
        ended: false,
        finished: false,
        decodeStrings: false,
        defaultEncoding: 'utf8',
        length: 0,
        writing: false,
        sync: true,
        bufferProcessing: false,
        onwrite: [Function],
        writecb: null,
        writelen: 0,
        buffer: [] },
     writable: true,
     allowHalfOpen: false,
     onend: null,
     destroyed: false,
     errorEmitted: false,
     bytesRead: 0,
     _bytesDispatched: 0,
     _pendingData: null,
     _pendingEncoding: '',
     pipe: [Function],
     addListener: [Function],
     on: [Function],
     pause: [Function],
     resume: [Function],
     read: [Function],
     _consuming: true },
  _protocol:
   { domain: null,
     _events:
      { drain: [Object],
        error: [Object],
        close: [Object],
        data: [Function: ondata],
        end: [Object],
        handshake: [Function],
        unhandledError: [Function] },
     _maxListeners: 10,
     readable: true,
     writable: true,
     _config:
      { host: 'localhost',
        port: '3000',
        socketPath: undefined,
        user: 'root',
        password: 'snareline1',
        database: 'test',
        insecureAuth: false,
        supportBigNumbers: false,
        bigNumberStrings: false,
        debug: undefined,
        timezone: 'local',
        flags: '',
        queryFormat: undefined,
        pool: undefined,
        multipleStatements: false,
        typeCast: true,
        maxPacketSize: 0,
        charsetNumber: 33,
        clientFlags: 193487 },
     _connection: [Circular],
     _callback: null,
     _fatalError: null,
     _quitSequence: null,
     _handshakeSequence:
      { domain: null,
        _events: [Object],
        _maxListeners: 10,
        _callback: undefined,
        _ended: false,
        _callSite: [Error],
        _config: [Object],
        _handshakeInitializationPacket: null },
     _handshaked: false,
     _destroyed: false,
     _queue: [ [Object] ],
     _handshakeInitializationPacket: null,
     _parser:
      { _supportBigNumbers: false,
        _buffer: <Buffer >,
        _longPacketBuffers: [],
        _offset: 0,
        _packetEnd: null,
        _packetHeader: null,
        _onPacket: [Function],
        _nextPacketNumber: 0,
        _encoding: 'utf-8',
        _paused: false } },
  _connectCalled: true,
  state: 'disconnected' }

谢谢你的帮助。

最佳答案

尝试：

conn = mysql.createConnection({
    host:'localhost',
    port:'3306',
    user:'root',
    password:'pass',
    database:'some_database'
});