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index.html
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index.html
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<!DOCTYPE html>
<!--
Author: Rolando Caldas Sanchez
Blog: http://rolandocaldas.com/
Google+: https://plus.google.com/+RolandoCaldasSanchez
Linkedin: http://www.linkedin.com/in/rolandocaldas
Twitter: https://twitter.com/rolando_caldas
This file is part of an article:
http://rolandocaldas.com/html5/indexeddb-recuperando-los-datos-almacenados
-->
<html>
<head>
<meta charset="UTF-8" />
<title>IndexedDB: Local Database with HTML5</title>
<script type="text/javascript">
var indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
var dataBase = null;
function startDB() {
dataBase = indexedDB.open("object", 1);
dataBase.onupgradeneeded = function (e) {
var active = dataBase.result;
var object = active.createObjectStore('people', { keyPath : 'id', autoIncrement : true });
object.createIndex('by_name', 'name', { unique : false });
object.createIndex('by_dni', 'dni', { unique : true});
};
dataBase.onsuccess = function (e) {
alert('Database loaded');
loadAll();
};
dataBase.onerror = function (e) {
alert('Error loading database');
};
}
function add() {
var active = dataBase.result;
var data = active.transaction(["people"], "readwrite");
var object = data.objectStore("people");
var request = object.put({
dni : document.querySelector("#dni").value,
name : document.querySelector("#name").value.toLowerCase(),
surname : document.querySelector("#surname").value
});
request.onerror = function (e) {
alert(request.error.name + '\n\n' + request.error.message);
};
data.oncomplete = function (e) {
document.querySelector('#dni').value = '';
document.querySelector('#name').value = '';
document.querySelector('#surname').value = '';
alert('Object successfully added');
loadAll();
};
}
function load(id) {
var active = dataBase.result;
var data = active.transaction(["people"], "readonly");
var object = data.objectStore("people");
var request = object.get(parseInt(id));
request.onsuccess = function () {
var result = request.result;
if (result !== undefined) {
alert("ID: " + result.id + "\n\
DNI: " + result.dni + "\n\
Name: " + result.name + "\n\
Surname: " + result.surname);
}
};
}
function loadByDni(dni) {
var active = dataBase.result;
var data = active.transaction(["people"], "readonly");
var object = data.objectStore("people");
var index = object.index("by_dni");
var request = index.get(String(dni));
request.onsuccess = function () {
var result = request.result;
if (result !== undefined) {
alert("ID: " + result.id + "\n\
DNI: " + result.dni + "\n\
Name: " + result.name + "\n\
Surname: " + result.surname);
}
};
}
function loadAll() {
var active = dataBase.result;
var data = active.transaction(["people"], "readonly");
var object = data.objectStore("people");
var elements = [];
object.openCursor().onsuccess = function (e) {
var result = e.target.result;
if (result === null) {
return;
}
elements.push(result.value);
result.continue();
};
data.oncomplete = function() {
var outerHTML = '';
for (var key in elements) {
outerHTML += '\n\
<tr>\n\
<td>' + elements[key].dni + '</td>\n\
<td>' + elements[key].name + '</td>\n\
<td>\n\
<button type="button" onclick="load(' + elements[key].id + ');">Details</button>\n\
<button type="button" onclick="loadByDni(' + elements[key].dni + ');">Details DNI</button>\n\
</td>\n\
</tr>';
}
elements = [];
document.querySelector("#elementsList").innerHTML = outerHTML;
};
}
function loadAllByName() {
var active = dataBase.result;
var data = active.transaction(["people"], "readonly");
var object = data.objectStore("people");
var index = object.index('by_name');
var elements = [];
index.openCursor().onsuccess = function (e) {
var result = e.target.result;
if (result === null) {
return;
}
elements.push(result.value);
result.continue();
};
data.oncomplete = function() {
var outerHTML = '';
for (var key in elements) {
outerHTML += '\n\
<tr>\n\
<td>' + elements[key].dni + '</td>\n\
<td>' + elements[key].name + '</td>\n\
<td>\n\
<button type="button" onclick="load(' + elements[key].id + ');">Details</button>\n\
<button type="button" onclick="loadByDni(' + elements[key].dni + ');">Details DNI</button>\n\
</td>\n\
</tr>';
}
elements = [];
document.querySelector("#elementsList").innerHTML = outerHTML;
};
}
</script>
</head>
<body onload="startDB();">
<input type="text" id="dni" placeholder="Enter dni" />
<input type="text" id="name" placeholder="Enter name" />
<input type="text" id="surname" placeholder="Enter surname" />
<button type="button" onclick="add();">Save</button>
<hr />
<div id="elements">
<table>
<caption>Persons</caption>
<thead>
<tr>
<th>DNI</th>
<th>Name</th>
<th> </th>
</tr>
</thead>
<tbody id="elementsList">
<tr>
<td colspan="3">Not elements to show</td>
</tr>
</tbody>
</table>
</div>
<button type="button" onclick="loadAllByName();">Order by name</button>
</body>
</html>