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<!DOCTYPE HTML>
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<title>Node MySQL | Pengenalan Node.js</title>
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<div class="book" data-level="8.2.1" data-chapter-title="Node MySQL" data-filepath="database/node_mysql.md" data-basepath=".." data-revision="Fri Nov 20 2015 03:32:10 GMT+0700 (WIB)">
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<b>1.</b>
Node.js
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JavaScript Di Server
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PHP & Server HTTP Apache
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<b>3.1.</b>
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<b>5.</b>
Pemrosesan Data Form HTML
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<b>5.1.</b>
URL Encode
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<b>5.2.</b>
Multipart Data
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<b>6.</b>
Module npm
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<b>6.1.</b>
Konsep
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<b>6.2.</b>
Paket npm
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<b>7.</b>
ExpressJS
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<b>7.1.</b>
Server File
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<b>7.1.1.</b>
Middleware
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<b>7.1.2.</b>
Akses Server
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<b>7.2.</b>
Server REST
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<b>8.</b>
Database
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<b>8.1.</b>
SQLite
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<b>8.1.1.</b>
Node Sqlite3
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<b>8.1.2.</b>
Enkripsi
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<b>8.1.2.1.</b>
sqlcipher
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<b>8.2.</b>
MySQL
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<b>8.2.1.</b>
Node MySQL
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<b>8.3.</b>
MongoDB
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<b>8.3.1.</b>
Node MongoDB
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<b>8.3.2.</b>
Mongoose
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<b>9.</b>
Testing
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<b>9.1.</b>
REST
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<b>9.2.</b>
Automasi
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<b>10.</b>
To Data URI
</a>
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<b>10.1.</b>
Penggunaan
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<b>10.2.</b>
todatauri.js
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<li class="chapter " data-level="10.3" data-path="todatauri/koneksi_mysql.html">
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<b>10.3.</b>
Koneksi MySQL
</a>
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<li class="chapter " data-level="11" data-path="person_rest_api/index.html">
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<b>11.</b>
Person REST API
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<b>11.1.</b>
Cara Kerja
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<b>11.2.</b>
Server
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<b>11.3.</b>
Pengetesan
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Image Uploader
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Memakai ES6
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Tentang Pengarang
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<h1 id="node-mysql">Node MySQL</h1>
<p>Implementasi driver dari MySQL untuk platform Node.jssudah sangat mature seperti modul <strong>node-mysql</strong> di <a href="https://github.com/felixge/node-mysql/" target="_blank">https://github.com/felixge/node-mysql/</a></p>
<h2 id="instalasi">Instalasi</h2>
<p>Seperti biasa untuk menginstall modul ini dan secara otomatis menyimpan nama & versi modul di file <code>package.json</code> yaitu dengan memakai perintah berikut</p>
<pre><code>$ npm install --save mysql
</code></pre><h2 id="koneksi-sederhana">Koneksi Sederhana</h2>
<p>Untuk membuat koneksi ke database MySQL salah satu caranya adalah dengan menggunakan metode <code>connection.connect()</code></p>
<pre><code>//app.js
var mysql = require('mysql');
/**
* Setting opsi dari connection,
* lihat https://github.com/felixge/node-mysql/
*/
var connection = mysql.createConnection({
host: 'localhost',
user: 'root',
password: ''
});
//Membuka koneksi ke database MySQL
connection.connect(function(err){
if(err) {
console.log(err);
} else {
console.log('Koneksi dengan id '+ connection.threadId);
}
});
// Query bisa dilakukan di sini
//Menutup koneksi
connection.end(function(err){
if(err) {
console.log(err);
} else {
console.log('koneksi ditutup!');
}
});
</code></pre><h2 id="query">Query</h2>
<p>Istilah <code>query</code> mungkin menurut mindset umum artinya adalah mengambil data dari database tetapi dalam modul node-mysql ini untuk membuat database atau schema juga didefiniskan sebagai <code>query</code>. Ada beberapa bentuk fungsi untuk wrapper <code>query</code></p>
<p><strong><code>connection.query(sqlString, callback)</code></strong> </p>
<p>Dengan memakai statemen SQL kita bisa membuat schema database <strong>ebook</strong> seperti berikut</p>
<pre><code>var create_db = 'CREATE DATABASE IF NOT EXISTS ebook'
connection.query(create_db, function(err, result){
if(err){
console.log(err);
} else {
console.log(result);
}
)
</code></pre><p><strong><code>connection.query(sqlString, value, callback)</code></strong> </p>
<p>Misalnya untuk menyimpan data semua judul buku pada database <strong>ebook</strong></p>
<pre><code>var ebook = {
id: 1,
title: 'Wiro Sableng Pendekar Kapak Maut Naga Geni 212 : Batu Tujuh Warna',
pengarang: 'Bastian Tito'
}
var insert_sql = 'INSERT INTO ebook SET ?';
connection.query(insert_sql, ebook, function(err, result){
err ? console.log(err): console.log(result);
})
</code></pre><p>Kalau dibutuhkan <code>escaping</code> value sebelum dimasukkan ke database MySQL bisa memakai metode <code>.escape()</code> atau pake placeholder <code>?</code>.</p>
<pre><code>var ebook = {
id: 1,
title: 'Wiro Sableng Pendekar Kapak Maut Naga Geni 212 : Batu Tujuh Warna',
pengarang: 'Bastian Tito'
}
var insert_sql = 'UPDATE ebook SET title = ? WHERE id = ?';
connection.query(insert_sql, [ebook.title, ebook.id], function(err, result){
err ? console.log(err): console.log(result);
})
</code></pre><p><strong><code>connection.query(options, callback)</code></strong> </p>
<p>Bentuk wrapper <code>query</code> yang terakhir ini cukup ringkas. Sesuaikan saja mana bentuk wrapper yang sesuai dengan kebutuhan anda.</p>
<pre><code>var ebook = {
sql: 'INSERT INTO ebook SET pengarang = ?',
timeout: 14000,
values: ['Pramoedya Ananta Toer']
}
connection.query(ebook, function(err, result, fields){
if(err) {
console.log(err);
} else {
console.log(result);
}
})
</code></pre><p>Metode <code>query</code> ini sangat fleksibel dan pada intinya kita bisa memakai statemen SQL yang biasa dipakai untuk query data di MySQL. Jadi penggunaan dari modul npm ini sebenarnya cukuplah mudah.</p>
<p>Untuk penggunaan modul npm ini lebih lanjut silahkan kunjungi Github <a href="https://github.com/felixge/node-mysql/" target="_blank">node-mysql</a> dan untuk contoh aplikasi yang memanfaatkan database ini bisa dilihat pada bab <a href="../todatauri/todatauri.html"><strong>Pengubah Gambar PNG Ke Data URI</strong></a>.</p>
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