我在我的nodejs網站有一個奇怪的問題。我有一個執行SQL命令的函數。它完美的工作,但運行幾天後的服務器。它開始返回一個空陣列!當我重新啓動服務器時,它會重新開始工作,但幾天後仍會崩潰。MySql命令是從終端工作,但不工作從節點js
這是錯誤(空數組錯誤):
TypeError: Cannot read property '0' of undefined
at Query._callback (/home/mikro/www/my_modules/database.js:47:27)
at Query.Sequence.end (/home/mikro/www/node_modules/mysql/lib/protocol/sequences/Sequence.js:86:24)
at /home/mikro/www/node_modules/mysql/lib/protocol/Protocol.js:226:14
at _combinedTickCallback (internal/process/next_tick.js:73:7)
at process._tickDomainCallback (internal/process/next_tick.js:128:9)
,這是功能:
login: function (username, password, callback) {
db.query('SELECT id, password, expdate FROM users WHERE username=' +
mysql.escape(username) + ';', function (err, rows) {
var row = rows[0];
if (err) console.error(err)
if (!row)
callback(ERR_USER_NOT_FOUND, null);
else
bcrypt.compare(password, row.password, function (err, result) {
if (result){
var expdate = row.expdate;
var currDate = moment(new Date()).format('YYYY-MM-DD HH:mm:ss');
if (moment(currDate).isAfter(expdate) && row.id !== 1)
callback ('Please pay your monthly fee to be able to login', null);
else
callback(null, row)
}
else {
callback(ERR_WRONG_PASSWORD, null);
}
})
});
}
我有nginx的代理服務器的Ubuntu和運行PM2。 我的依賴關係:
"dependencies": {
"bcrypt-nodejs": "latest",
"body-parser": "~1.16.0",
"connect-flash": "^0.1.1",
"cookie-parser": "~1.4.3",
"debug": "~2.6.0",
"ejs": "~2.5.5",
"express": "~4.14.1",
"express-session": "^1.15.1",
"moment": "^2.18.1",
"morgan": "~1.7.0",
"mysql": "latest",
"serve-favicon": "~2.3.2",
"socket.io": "latest",
"jwt-simple": "latest",
"jsonfile": "latest",
"express-mysql-session": "latest",
"express-rate-limit": "latest"
}
UPDATE1
這是連接代碼:
var mysql = require('mysql');
var db = mysql.createConnection(require('./config'));
db.connect();
用戶名是否意味着字符串?如果是這樣,它應該用引號括起來。如果這不是問題,您是否介意發佈可以成功運行的查詢? – RToyo
顯示你的mysql連接代碼。 –
@RobbieToyota是的,它是一個字符串,這不是問題,因爲它重新啓動服務器之前工作和再次工作。但是問題出現很多時間,每次我重置服務器時都會解決問題。但是,我不能每次出現問題時重置服務器! –