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Promisified MySQL middleware for Node.js
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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 |
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