在Angular Universal中将MySQL数据库与Node.js连接时出错。TypeError:无法读取属性';在';未定义的
我想在Angular Universal项目中通过Node.js连接到MySQL数据库 连接代码很简单:在Angular Universal中将MySQL数据库与Node.js连接时出错。TypeError:无法读取属性';在';未定义的,mysql,node.js,angular,angular-universal,Mysql,Node.js,Angular,Angular Universal,我想在Angular Universal项目中通过Node.js连接到MySQL数据库 连接代码很简单: var mysql = require('mysql'); var connection = mysql.createConnection({ host : 'localhost', user : 'root', password : 'root', database : 'dbname',
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : 'root',
database : 'dbname',
port: '8889'
});
connection.connect(function(err) {
if (err) {
console.log("Error connecting to DB: " + err);
throw err;
}
});
首先,我得到以下错误:
TypeError: Cannot read property 'on' of undefined
at Protocol._enqueue (/Applications/MAMP/htdocs/Angular2/myproject/node_modules/mysql/lib/protocol/Protocol.js:152:5)
...
Error connecting to DB: Error: Connection lost: The server closed the connection.
几秒钟后,出现以下错误:
TypeError: Cannot read property 'on' of undefined
at Protocol._enqueue (/Applications/MAMP/htdocs/Angular2/myproject/node_modules/mysql/lib/protocol/Protocol.js:152:5)
...
Error connecting to DB: Error: Connection lost: The server closed the connection.
请告诉我在这种情况下应该做什么来解决问题
非常感谢。如果我将package.json中zone.js的版本更改为0.7.4,那么一切都可以正常工作 这个问题在我安装Zone.js的最新版本时得到了解决:npm install Zone。js@latest.