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@hagemann
Last active December 9, 2022 10:24
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Promisified MySQL middleware for Node.js
const util = require('util')
const mysql = require('mysql')
const pool = mysql.createPool({
connectionLimit: 10,
host: 'localhost',
user: 'root',
password: 'password',
database: 'my_database'
})
// Ping database to check for common exception errors.
pool.getConnection((err, connection) => {
if (err) {
if (err.code === 'PROTOCOL_CONNECTION_LOST') {
console.error('Database connection was closed.')
}
if (err.code === 'ER_CON_COUNT_ERROR') {
console.error('Database has too many connections.')
}
if (err.code === 'ECONNREFUSED') {
console.error('Database connection was refused.')
}
}
if (connection) connection.release()
return
})
// Promisify for Node.js async/await.
pool.query = util.promisify(pool.query)
module.exports = pool
@Castrogiovanni20
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Thanks a lot. This is useful

@AkashWarlocks
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whenever i use await it shows 3 dot (...) below it meaning 'await' has no effect on the type of this expression.

i have used everything mentioned above

@zirtrex
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zirtrex commented Nov 2, 2020

hi, how I add queryFormat to pool connections?

@mrudangshah
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Hi there,

I am using this database connection configuration but somehow it is throwing an error while fire the query.

import { pool } from '../../config/mysql-config';
public async insertRecords() {
  try {
    const SQL = `INSERT INTO ${tableName} (description, title)
      VALUES ("description", "title")`

    const result = await pool.query(SQL)
    return result
    
  } catch (error) {
    throw new Error(error);
  }
}

Screenshot from 2021-05-24 11-29-29

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