NodeJS
This time I'd like to share a basic and simple example of CRUD Operation in Node.js and MySQL. Its a lil bit hard to find tutorial Node.js n MySQL as poeple tend to use Mongoose instead of MySQL.before we start, please mind the environment of this application.
- I'm using Ubuntu
- NPM, Express
- MySQL for Node
I haven't tested it yet on Windows. but i bet this will work too.
Installing all those things above
Install Node.js, NPM and Express in Ubuntu
After you installation's completed, lets start creating your project folder:
ubuntu@AcerXtimeline:~$ express hello_world
once your hello_world folder is ready, Install MySQL. Go inside hello_world
ubuntu@AcerXtimeline:~/hello_world$ npm install mysql
We need a connection manager in Express. install it
ubuntu@AcerXtimeline:~/hello_world$ npm install express-myconnection
Now take a look at this Folder structure
See you folder structure, compare it to the picture above.make new folder/files that you dont have yet in folder just like on the pic.
Are we ready yet ?
1. Careate a MySQL Database :nodejs and create a tablecustomer (id,name,address,email,phone). or you can import the SQL in source code (see the end of this tuts)
2. Open app.js . by default some codes are already given for you. we'll just need to add a lil more codes.
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var http = require('http');
var path = require('path');
//load customers route
var customers = require('./routes/customers');
var app = express();
var connection= require('express-myconnection');
var mysql = require('mysql');
// all environments
app.set('port', process.env.PORT || 4300);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
//app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
/*------------------------------------------
connection peer, register as middleware
type koneksi : single,pool and request
-------------------------------------------*/
app.use(
connection(mysql,{
host: 'localhost',
user: 'root',
password : '',
port : 3306, //port mysql
database:'nodejs'
},'request')
);//route index, hello world
app.get('/', routes.index);//route customer list
app.get('/customers', customers.list);//route add customer, get n post
app.get('/customers/add', customers.add);
app.post('/customers/add', customers.save);//route delete customer
app.get('/customers/delete/:id', customers.delete_customer);//edit customer route , get n post
app.get('/customers/edit/:id', customers.edit);
app.post('/customers/edit/:id',customers.save_edit);
app.use(app.router);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
remember to make new files/folder like shown on the above pic.
Now, wee need codes to DO THE CRUD. the file's locatedroutes/customers.js
/*
* GET customers listing.
*/
exports.list = function(req, res){
req.getConnection(function(err,connection){
connection.query('SELECT * FROM customer',function(err,rows) {
if(err)
console.log("Error Selecting : %s ",err );
res.render('customers',{page_title:"Customers - Node.js",data:rows});
});
});
};
exports.add = function(req, res){
res.render('add_customer',{page_title:"Add Customers-Node.js"});
};
exports.edit = function(req, res){
var id = req.params.id;
req.getConnection(function(err,connection){
connection.query('SELECT * FROM customer WHERE id = ?',[id],function(err,rows)
{
if(err)
console.log("Error Selecting : %s ",err );
res.render('edit_customer',{page_title:"Edit Customers - Node.js",data:rows});
});
});
};
/*Save the customer*/
exports.save = function(req,res){
var input = JSON.parse(JSON.stringify(req.body));
req.getConnection(function (err, connection) {
var data = {
name: input.name,
address : input.address,
email : input.email,
phone : input.phone
};
var query = connection.query("INSERT INTO customer set ? ",data, function(err, rows)
{
if (err)
console.log("Error inserting : %s ",err );
res.redirect('/customers');
});
// console.log(query.sql); get raw query
});
};
exports.save_edit = function(req,res){
var input = JSON.parse(JSON.stringify(req.body));
var id = req.params.id;
req.getConnection(function (err, connection) {
var data = {
name: input.name,
address : input.address,
email : input.email,
phone : input.phone
};
connection.query("UPDATE customer set ? WHERE id = ? ",[data,id], function(err, rows)
{
if (err)
console.log("Error Updating : %s ",err );
res.redirect('/customers');
});
});
};
exports.delete_customer = function(req,res){
var id = req.params.id;
req.getConnection(function (err, connection) {
connection.query("DELETE FROM customerWHERE id = ? ",[id], function(err, rows)
{
if(err)
console.log("Error deleting : %s ",err );
res.redirect('/customers');
});
});
};
here's html code (ejs template) for listing the customer
<%- include layouts/header.ejs %>
No Name Address Phone Action
<% if(data.length){
for(var i = 0;i < data.length;i++) { %><%=(i+1)%> <%=data[i].name%> <%=data[i].address%> <%=data[i].phone%> <%=data[i].email%>
Edit
Delete
<% }
}else{ %>
No user
<% } %>
<%- include layouts/footer.ejs %>
Well, actually 'm too lazy to put it all here...its gonna be a long scroll :(. pardon me for that. I think you can just download the Source herenodecrud and put a questions or issue on the Comment bellow.
run the the source code :
ubuntu@AcerXtimeline:~/hello_world$ node app.js
http://localhost:4300/customers
The source will produce things like these:
Happy coding
