In this tutorial, you will learn how to import CSV files in Node js express using multer & fast CSV and store or insert data in MySQL database.
How to Import CSV File In MySQL Using Node.js Express
Steps to import CSV file in node js express using multer & fast csv and insert data in MySQL DB:
Step 1 – Create Node Express js App
Run the following command on the terminal to create a node js app:
mkdir my-app cd my-app npm init -y
Step 2 – Create a Table in MySQL Database
Execute the following SQL query to create a table in your database:
CREATE TABLE `customer` ( `id` bigint(20) NOT NULL, `address` varchar(255) DEFAULT NULL, `age` int(11) DEFAULT NULL, `name` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8
Step 3 – Install express multer body-parser MySQL dependencies
Run the following command on the terminal to express multer ejs body-parser mysql dependencies :
npm install express multer body-parser mysql fast-csv
Step 4 – Create Html File Upload/Import Form
Create a form with a `file input` field that allows users to choose the csv file for upload:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Node js upload csv file to MySQL database - Tutsmake.com</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>Node js upload csv file to MySQL database - Tutsmake.com</h1>
<form action="/uploadfile" enctype="multipart/form-data" method="post">
<input type="file" name="uploadfile" accept='csv' >
<input type="submit" value="Upload CSV">
</form>
</body>
</html>
Make sure your form must have enctype="multipart/form-data"attribute and form method should be post.
Step 5 – Create Server.js File
Create server.js file and import express multer body-parser mysql dependencies in server.js; as shown below:
const express = require('express')
const app = express()
const bodyparser = require('body-parser')
const fs = require('fs');
const csv = require('fast-csv');
const mysql = require('mysql')
const multer = require('multer')
const path = require('path')
//use express static folder
app.use(express.static("./public"))
// body-parser middleware use
app.use(bodyparser.json())
app.use(bodyparser.urlencoded({
extended: true
}))
// Database connection
const db = mysql.createConnection({
host: "localhost",
user: "root",
password: "",
database: "test"
})
db.connect(function (err) {
if (err) {
return console.error('error: ' + err.message);
}
console.log('Connected to the MySQL server.');
})
//! Use of Multer
var storage = multer.diskStorage({
destination: (req, file, callBack) => {
callBack(null, './uploads/')
},
filename: (req, file, callBack) => {
callBack(null, file.fieldname + '-' + Date.now() + path.extname(file.originalname))
}
})
var upload = multer({
storage: storage
});
//! Routes start
//route for Home page
app.get('/', (req, res) => {
res.sendFile(__dirname + '/index.html');
});
//@type POST
// upload csv to database
app.post('/uploadfile', upload.single("uploadfile"), (req, res) =>{
UploadCsvDataToMySQL(__dirname + '/uploads/' + req.file.filename);
console.log('CSV file data has been uploaded in mysql database ' + err);
});
function UploadCsvDataToMySQL(filePath){
let stream = fs.createReadStream(filePath);
let csvData = [];
let csvStream = csv
.parse()
.on("data", function (data) {
csvData.push(data);
})
.on("end", function () {
// Remove Header ROW
csvData.shift();
// Open the MySQL connection
db.connect((error) => {
if (error) {
console.error(error);
} else {
let query = 'INSERT INTO customer (id, address, name, age) VALUES ?';
db.query(query, [csvData], (error, response) => {
console.log(error || response);
});
}
});
// delete file after saving to MySQL database
// -> you can comment the statement to see the uploaded CSV file.
fs.unlinkSync(filePath)
});
stream.pipe(csvStream);
}
//create connection
const PORT = process.env.PORT || 3000
app.listen(PORT, () => console.log(`Server is running at port ${PORT}`))
Step 6 – Test Application
You can use the following command to start node js upload csv file to mysql database app server:
//run the below command npm start after run this command open your browser and hit http://127.0.0.1:3000/
Conclusion
Upload CSV file in mysql database using node js; In this tutorial, you have learned how to upload CSV file data into MySQL database using Node js + express + multer + fast CSV.
