如何将连接转换为 MySQL 中的池连接？

Question

我。我编写了下面的代码，但我最近了解了池连接，根据我阅读的内容，它更好。我只是不明白如何将连接导出到不同的文件。所以，如果你能指导我如何做到这一点，我将不胜感激。谢谢。

connection.js：

var mysql = require('mysql');
 
const con = mysql.createConnection({
      host:'127.0.0.1', // host of server
      user:'root', // MySQL user
      password:'BLABLABLA', // MySQL password
      database: "rpg"
    });
    
exports.con = con

数据库.js：

const con = require('./connection').con;

mp.events.add('playerJoin', (player) => {
    con.query('INSERT INTO BLA BLA BLA', function (err, result) {
//ETC ETC

基本上，我想知道如何导出、导入和查询。我正在使用 MySQL Workbench 8.0。非常感谢。

Answer 1

创建池的代码与您现在的代码非常相似。唯一的区别是从池中请求连接的额外步骤。

connection.js

const mysql = require('mysql');

const pool = mysql.createPool({
  connectionLimit: 10,
  host: "localhost",
  user: "user",
  password: "password",
  database: "rpg"
});


exports.pool = pool;

数据库.js

const pool = require("./connection").pool;

// Ask the pool for a connection
pool.getConnection((err, conn) => {
    if(err){
    
        // Do something with the error
  
    } else {
  
        // Do something with the connection and release it after you're done
        conn.query('INSERT INTO BLA BLA BLA', (err, rows) => {
            // Do something with the result

            // release the connection after you're done so it can be reused
            conn.release();
        });
    }

});