无法使用 Node.js 连接到 MySQL 数据库

Question

我的应用程序必须连接到 mysql 数据库，但在那一刻我被卡住了，我无法连接它，我使用了一种将回调代码转换为承诺代码的方法，这就是我需要使用异步并等待的原因，教程的人也没有我猜有任何错误，因为他在keys.js 上有不同的条款，他在Linux 上，root 用户，而且他有密码，我没有的东西。 我真的需要他谢谢你。 这是出现问题的代码：

    const express= require('express');
const router= express.Router();

const pool = require('../database');

router.get('/add', (req,res) =>{
res.render('casas/add');
});

router.post('/add',  async (req,res) => {
    const {titulo, precio, direccion, numhab, superficie} = req.body;
    const nuevoPiso={
        titulo,
        precio,
        direccion,
        numhab,
        superficie
    };

   await pool.query('INSERT INTO PISOS set ?', [nuevoPiso]);
   res.send('recibido');
});



module.exports=router;

问题出在 await 行上，因为如果我删除它和异步词，它可以完美运行，但显然没有我无法将元素发送到数据库。 给我终端的错误是这样的：

(node:9548) UnhandledPromiseRejectionWarning: Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'Axell'@'localhost' (using password: NO)
    at Handshake.Sequence._packetToError (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\sequences\Sequence.js:47:14)
    at Handshake.ErrorPacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\sequences\Handshake.js:123:18)
    at Protocol._parsePacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:291:23)
    at Parser._parsePacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Parser.js:433:10)
    at Parser.write (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Parser.js:43:10)
    at Protocol.write (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:38:16)
    at Socket.<anonymous> (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:88:28)
    at Socket.<anonymous> (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:526:10)
    at Socket.emit (events.js:311:20)
    at addChunk (_stream_readable.js:294:12)
    --------------------
    at Protocol._enqueue (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:144:48)
    at Protocol.handshake (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:51:23)
    at PoolConnection.connect (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:116:18)
    at Pool.getConnection (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Pool.js:48:16)
    at Pool.query (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Pool.js:202:8)
    at internal/util.js:297:30
    at new Promise (<anonymous>)
    at Pool.query (internal/util.js:296:12)
    at C:\Users\Axell\Desktop\node-sql-app\src\routes\casas.js:20:15
    at Layer.handle [as handle_request] (C:\Users\Axell\Desktop\node-sql-app\node_modules\express\lib\router\layer.js:95:5)
(node:9548) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This 
error originated either by throwing inside of an async function without a catch 
block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:9548) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
POST /casas/add - - ms - -
(node:9548) UnhandledPromiseRejectionWarning: Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'Axell'@'localhost' (using password: NO)
    at Handshake.Sequence._packetToError (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\sequences\Sequence.js:47:14)
    at Handshake.ErrorPacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\sequences\Handshake.js:123:18)
    at Protocol._parsePacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:291:23)
    at Parser._parsePacket (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Parser.js:433:10)
    at Parser.write (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Parser.js:43:10)
    at Protocol.write (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:38:16)
    at Socket.<anonymous> (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:88:28)
    at Socket.<anonymous> (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:526:10)
    at Socket.emit (events.js:311:20)
    at addChunk (_stream_readable.js:294:12)
    --------------------
    at Protocol._enqueue (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:144:48)
    at Protocol.handshake (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\protocol\Protocol.js:51:23)
    at PoolConnection.connect (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Connection.js:116:18)
    at Pool.getConnection (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Pool.js:48:16)
    at Pool.query (C:\Users\Axell\Desktop\node-sql-app\node_modules\mysql\lib\Pool.js:202:8)
    at internal/util.js:297:30
    at new Promise (<anonymous>)
    at Pool.query (internal/util.js:296:12)
    at C:\Users\Axell\Desktop\node-sql-app\src\routes\casas.js:20:15
    at Layer.handle [as handle_request] (C:\Users\Axell\Desktop\node-sql-app\node_modules\express\lib\router\layer.js:95:5)
(node:9548) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This 
error originated either by throwing inside of an async function without a catch 
block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
POST /casas/add - - ms - -

我不知道错误可能在我的 keys.js 上的哪里，我在 windows 上有这个 im 是我的用户名，但我没有密码：

module.exports={


    database:{
        host:'localhost',
        user:'Axell',
        database: 'casas',
        password: ''
    }

};

在这里你可以下载整个应用程序它是未完成的，因为我因为这个错误无法继续： https : //mega.nz/#!LAwgwAQK!OiuBqH4qxyT5CW2xRSUXdmhpfRyTtf3TobmYw-NqIic

非常感谢！

Answer 1

您遇到的问题与 async/await 无关。

MySQL 的凭据不正确。 这可能是不正确的用户名、不正确的密码，或者您可能没有授予Axell访问casas数据库的权限。

鉴于您在 localhost 上，您可以在没有 localhost 的情况下进行测试。 只需尝试使用其他 mysql 工具（例如mysql ）工具使用相同的凭据登录，您应该会收到类似的错误。