Easy node.js mysql database table seeder

index.js

// first, install npm dependencies:
// npm i mysql2 @faker-js/faker dotenv

// and don't forget to add the mysql db credentials to your .env file

// run with the command "node ./index.js"

const mysql = require("mysql2");
const { faker } = require("@faker-js/faker");

require("dotenv").config();

function getSeedQuery(amount = 10000) {
  return Array.from({ length: amount })
    .map(() => {
      const date = faker.date.past(5);
      const time = new Date();
      const currency = faker.finance.currencyCode();
      const rate = faker.finance.amount(1.0, 9.99).toString();

      const sql = `INSERT INTO ExchangeRates (date, time, currency, rate) VALUES ('${date.toISOString()}', '${time.toTimeString()}', '${currency}', '${rate}')`;
      return sql;
    })
    .join(";\n");
}

const connection = mysql.createConnection({
  host: process.env.DB_HOST,
  user: process.env.DB_USER,
  password: process.env.DB_PASS,
  database: process.env.DB_NAME,
  multipleStatements: true,
});

connection.connect();

const seedQuery = getSeedQuery(10000);

connection.query(seedQuery, (err, results) => {
  if (err) {
    console.log(err);
  }
  console.log("Seeding complete");
  connection.end();
});