Ajax Function

This example shows how the StateRestore extension can be operated over ajax when setting the ajax option of the stateRestoreConfig configuration object to be a function.

When ajax is a function, it will be called when the following actions are taken.

loading states into StateRestore
save
rename
remove

The function takes two arguments, the first of which is an object. The first value on the object (action) is one of the above actions as a string. This will allow your function to act accordingly.

The second value on the object, stateRestore is another object. The keys of this object indicate which state the action is taking place on, the corresponding value is either the state to be saved, or in the case of rename, the new name for that state. There is no stateRestore property when loading states.

The second argument taken by the function is a callback that should be called when loading in states to StateRestore. An object of the same structure as the preDefined option of the stateRestoreConfig configuration object should be passed in to this function in order to load the states into DataTables.

This example demonstrates how IndexedDB could be used to store states, implemented through idb.

Name	Position	Office	Age	Start date	Salary
Tiger Nixon	System Architect	Edinburgh	61	2011-04-25	$320,800
Garrett Winters	Accountant	Tokyo	63	2011-07-25	$170,750
Ashton Cox	Junior Technical Author	San Francisco	66	2009-01-12	$86,000
Cedric Kelly	Senior Javascript Developer	Edinburgh	22	2012-03-29	$433,060
Airi Satou	Accountant	Tokyo	33	2008-11-28	$162,700
Brielle Williamson	Integration Specialist	New York	61	2012-12-02	$372,000
Herrod Chandler	Sales Assistant	San Francisco	59	2012-08-06	$137,500
Rhona Davidson	Integration Specialist	Tokyo	55	2010-10-14	$327,900
Colleen Hurst	Javascript Developer	San Francisco	39	2009-09-15	$205,500
Sonya Frost	Software Engineer	Edinburgh	23	2008-12-13	$103,600
Jena Gaines	Office Manager	London	30	2008-12-19	$90,560
Quinn Flynn	Support Lead	Edinburgh	22	2013-03-03	$342,000
Charde Marshall	Regional Director	San Francisco	36	2008-10-16	$470,600
Haley Kennedy	Senior Marketing Designer	London	43	2012-12-18	$313,500
Tatyana Fitzpatrick	Regional Director	London	19	2010-03-17	$385,750
Michael Silva	Marketing Designer	London	66	2012-11-27	$198,500
Paul Byrd	Chief Financial Officer (CFO)	New York	64	2010-06-09	$725,000
Gloria Little	Systems Administrator	New York	59	2009-04-10	$237,500
Bradley Greer	Software Engineer	London	41	2012-10-13	$132,000
Dai Rios	Personnel Lead	Edinburgh	35	2012-09-26	$217,500
Jenette Caldwell	Development Lead	New York	30	2011-09-03	$345,000
Yuri Berry	Chief Marketing Officer (CMO)	New York	40	2009-06-25	$675,000
Caesar Vance	Pre-Sales Support	New York	21	2011-12-12	$106,450
Doris Wilder	Sales Assistant	Sydney	23	2010-09-20	$85,600
Angelica Ramos	Chief Executive Officer (CEO)	London	47	2009-10-09	$1,200,000
Gavin Joyce	Developer	Edinburgh	42	2010-12-22	$92,575
Jennifer Chang	Regional Director	Singapore	28	2010-11-14	$357,650
Brenden Wagner	Software Engineer	San Francisco	28	2011-06-07	$206,850
Fiona Green	Chief Operating Officer (COO)	San Francisco	48	2010-03-11	$850,000
Shou Itou	Regional Marketing	Tokyo	20	2011-08-14	$163,000
Michelle House	Integration Specialist	Sydney	37	2011-06-02	$95,400
Suki Burks	Developer	London	53	2009-10-22	$114,500
Prescott Bartlett	Technical Author	London	27	2011-05-07	$145,000
Gavin Cortez	Team Leader	San Francisco	22	2008-10-26	$235,500
Martena Mccray	Post-Sales support	Edinburgh	46	2011-03-09	$324,050
Unity Butler	Marketing Designer	San Francisco	47	2009-12-09	$85,675
Howard Hatfield	Office Manager	San Francisco	51	2008-12-16	$164,500
Hope Fuentes	Secretary	San Francisco	41	2010-02-12	$109,850
Vivian Harrell	Financial Controller	San Francisco	62	2009-02-14	$452,500
Timothy Mooney	Office Manager	London	37	2008-12-11	$136,200
Jackson Bradshaw	Director	New York	65	2008-09-26	$645,750
Olivia Liang	Support Engineer	Singapore	64	2011-02-03	$234,500
Bruno Nash	Software Engineer	London	38	2011-05-03	$163,500
Sakura Yamamoto	Support Engineer	Tokyo	37	2009-08-19	$139,575
Thor Walton	Developer	New York	61	2013-08-11	$98,540
Finn Camacho	Support Engineer	San Francisco	47	2009-07-07	$87,500
Serge Baldwin	Data Coordinator	Singapore	64	2012-04-09	$138,575
Zenaida Frank	Software Engineer	New York	63	2010-01-04	$125,250
Zorita Serrano	Software Engineer	San Francisco	56	2012-06-01	$115,000
Jennifer Acosta	Junior Javascript Developer	Edinburgh	43	2013-02-01	$75,650
Cara Stevens	Sales Assistant	New York	46	2011-12-06	$145,600
Hermione Butler	Regional Director	London	47	2011-03-21	$356,250
Lael Greer	Systems Administrator	London	21	2009-02-27	$103,500
Jonas Alexander	Developer	San Francisco	30	2010-07-14	$86,500
Shad Decker	Regional Director	Edinburgh	51	2008-11-13	$183,000
Michael Bruce	Javascript Developer	Singapore	29	2011-06-27	$183,000
Donna Snider	Customer Support	New York	27	2011-01-25	$112,000
Name	Position	Office	Age	Start date	Salary

Javascript
HTML
CSS
Ajax
Server-side script
Comments

The Javascript shown below is used to initialise the table shown in this example:

var states = new IDBStore({
	dbVersion: 1,
	storeName: 'states',
	keyPath: 'identifier',
	onStoreReady: function () {
		initDataTable();
	}
});

function initDataTable() {
	// We need to wait for the database to be ready as the load will run straight away
	$('#example').DataTable({
		layout: {
			topStart: {
				buttons: [
					'createState',
					{
						extend: 'savedStates',
						config: {
							ajax: function (data, callback) {
								// Action to take if loading states into staterestore
								if (data.action === 'load') {
									var reloadStates = (loadData) => {
										// Manipulate the data into the structure expected by the callback
										var cbData = {};
										for (var i = 0; i < loadData.length; i++) {
											// Convert back from the string created when saving
											cbData[loadData[i].identifier] = JSON.parse(
												loadData[i].state
											);
										}

										// Load states into StateRestore
										callback(cbData);
									};

									states.getAll(reloadStates);
								}
								// Action to take if renaming states
								else if (data.action === 'rename') {
									// Get all of the state identifiers
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										var savesuccess = (saveData) => {
											// Remove the record with the current identifier
											states.remove(saveData.identifier);
											// Add a new record with the updated identifier that uses the old state
											states.put({
												identifier: data.stateRestore[saveData.identifier],
												state: saveData.state
											});
										};

										states.get(ids[i], savesuccess);
									}
									callback();
								}
								// Action to take if removing states
								else if (data.action === 'remove') {
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										// Remove all of the states listed in the object
										states.remove(ids[i]);
									}
									callback();
								}
								// Action to take if saving states
								else if (data.action === 'save') {
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										// Add all of the states listed in the object
										// Important to convert state to a string as it is too complex for IndexedDB to handle
										states.put({
											identifier: ids[i],
											state: JSON.stringify(data.stateRestore[ids[i]])
										});
									}
									callback();
								}
							}
						}
					}
				]
			}
		}
	});
}

var states = new IDBStore({
	dbVersion: 1,
	storeName: 'states',
	keyPath: 'identifier',
	onStoreReady: function () {
		initDataTable();
	}
});

function initDataTable() {
	// We need to wait for the database to be ready as the load will run straight away
	new DataTable('#example', {
		layout: {
			topStart: {
				buttons: [
					'createState',
					{
						extend: 'savedStates',
						config: {
							ajax: function (data, callback) {
								// Action to take if loading states into staterestore
								if (data.action === 'load') {
									var reloadStates = (loadData) => {
										// Manipulate the data into the structure expected by the callback
										var cbData = {};
										for (var i = 0; i < loadData.length; i++) {
											// Convert back from the string created when saving
											cbData[loadData[i].identifier] = JSON.parse(
												loadData[i].state
											);
										}

										// Load states into StateRestore
										callback(cbData);
									};

									states.getAll(reloadStates);
								}
								// Action to take if renaming states
								else if (data.action === 'rename') {
									// Get all of the state identifiers
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										var savesuccess = (saveData) => {
											// Remove the record with the current identifier
											states.remove(saveData.identifier);
											// Add a new record with the updated identifier that uses the old state
											states.put({
												identifier: data.stateRestore[saveData.identifier],
												state: saveData.state
											});
										};

										states.get(ids[i], savesuccess);
									}
									callback();
								}
								// Action to take if removing states
								else if (data.action === 'remove') {
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										// Remove all of the states listed in the object
										states.remove(ids[i]);
									}
									callback();
								}
								// Action to take if saving states
								else if (data.action === 'save') {
									var ids = Object.keys(data.stateRestore);
									for (var i = 0; i < ids.length; i++) {
										// Add all of the states listed in the object
										// Important to convert state to a string as it is too complex for IndexedDB to handle
										states.put({
											identifier: ids[i],
											state: JSON.stringify(data.stateRestore[ids[i]])
										});
									}
									callback();
								}
							}
						}
					}
				]
			}
		}
	});
}

In addition to the above code, the following Javascript library files are loaded for use in this example:

The HTML shown below is the raw HTML table element, before it has been enhanced by DataTables:

This example uses a little bit of additional CSS beyond what is loaded from the library files (below), in order to correctly display the table. The additional CSS used is shown below:

The following CSS library files are loaded for use in this example to provide the styling of the table:

This table loads data by Ajax. The latest data that has been loaded is shown below. This data will update automatically as any additional data is loaded.

The script used to perform the server-side processing for this table is shown below. Please note that this is just an example script using PHP. Server-side processing scripts can be written in any language, using the protocol described in the DataTables documentation.

Ajax Function

Other examples

Initialisation and options

Customisation

Integration with other DataTables extensions

Styling

DataTables