JS无法查询MySQL数据库.错误:connection.query不是函数 [英] JS Can't query MySQL database. ERROR: connection.query is not a function
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问题描述
试图查询我的mySQL数据库,但不能,因为我收到 TypeError:connection.query不是函数
错误.有谁知道为什么吗?我不知道为什么会这样.
Trying to query my mySQL database but I can't because i get a TypeError: connection.query is not a function
error. Does anyone have any idea why? I don't have any clue as to why this is happening.
database.js
const fs = require('fs'); // node.js file system module
require('dotenv').config(); // stores tokens, keys, passwords and other info
const Discord = require('discord.js'); // links discord.js api to file
const database = require('./database.js');
const client = new Discord.Client(); // creates bot user
let connection;
(async () => {
connection = await require('./database.js');
await client.login(process.env.TOKEN); // bot goes from offline to online
})();
client.once('ready', () => console.info(`[${date.toLocaleString()}] INFO | Ready, logged in as ${client.user.tag} (${client.user.id})\n------------------------`));
client.on('guildCreate', async guild => {
try {
await connection.query(`INSERT INTO guildInfo VALUES('${guild.id}', '${guild.ownerID}')`);
await connection.query(`INSERT INTO guildConfig (guildID) VALUES('${guild.id}')`);
} catch(err) {
console.error(err);
}
});
database.js
require('dotenv').config();
const mysql = require('mysql2/promise');
date = new Date();
mysql.createConnection({
user: process.env.USER,
password: process.env.PASSWORD,
database: process.env.DATABASE
}).then(connection => console.info(`[${date.toLocaleString()}] INFO | Waiting for input/changes to code\n------------------------`)).catch(err => console.error(err));
错误
TypeError: connection.query is not a function
at Client.<anonymous> (C:\Users\Patrick Lawrence\Desktop\Synth\index.js:43:20)
at Client.emit (events.js:315:20)
at Object.module.exports [as GUILD_CREATE] (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\discord.js\src\client\websocket\handlers\GUILD_CREATE.js:33:14)
at WebSocketManager.handlePacket (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\discord.js\src\client\websocket\WebSocketManager.js:384:31)
at WebSocketShard.onPacket (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\discord.js\src\client\websocket\WebSocketShard.js:444:22)
at WebSocketShard.onMessage (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\discord.js\src\client\websocket\WebSocketShard.js:301:10)
at WebSocket.onMessage (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\ws\lib\event-target.js:125:16)
at WebSocket.emit (events.js:315:20)
at Receiver.receiverOnMessage (C:\Users\Patrick Lawrence\Desktop\Synth\node_modules\ws\lib\websocket.js:797:20)
at Receiver.emit (events.js:315:20)
推荐答案
您根本不会在 database.js
中导出连接.
Simply you don't export the connection in database.js
.
创建连接后,将其分配给变量,例如 const connection
,然后在文件 module.exports = connection
的底部键入.
Once created connection, assign it to a variable like const connection
and type at bottom of the file module.exports = connection
.
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