Dependent fields

When working with complex forms, you often have fields whose state is dependent upon the input values of other fields in the form. For example you might have a select list of options, the options for which depend upon the value selected for another select list.

The dependent() method is available in Editor to make this type of complex interaction trivial. You simply attach the dependent() method to the field that you want to trigger an update form when its value changes. You then have the option of defining a local callback or an Ajax call that will return an object that will reconfigure the form. You have the options of showing, hiding, enabling and disabling fields. You can also update labels, options, values, information messages and error messages! See the dependent() documentation for full details.

This example shows dependent() attached to a simple select field that is used to show and hide additional fields in the table (a simple and complex view). This is just a very simple example to show how easy it is to get started with dependent().

Name	Position	Office	Extn.	Start date	Salary
Name	Position	Office	Extn.	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 editor = new DataTable.Editor({
	ajax: '../php/staff.php',
	fields: [
		{
			label: 'First name:',
			name: 'first_name'
		},
		{
			label: 'Last name:',
			name: 'last_name'
		},
		{
			label: 'Show options:',
			name: 'options',
			type: 'select',
			options: ['Simple', 'All'],
			def: 'Simple'
		},
		{
			label: 'Position:',
			name: 'position'
		},
		{
			label: 'Office:',
			name: 'office'
		},
		{
			label: 'Extension:',
			name: 'extn'
		},
		{
			label: 'Start date:',
			name: 'start_date',
			type: 'datetime'
		},
		{
			label: 'Salary:',
			name: 'salary'
		}
	],
	table: '#example'
});

editor.dependent('options', function (val) {
	return val === 'Simple'
		? { hide: ['position', 'office', 'extn', 'start_date', 'salary'] }
		: { show: ['position', 'office', 'extn', 'start_date', 'salary'] };
});

$('#example').DataTable({
	ajax: '../php/staff.php',
	columns: [
		{
			data: null,
			render: function (data, type, row) {
				// Combine the first and last names into a single table field
				return data.first_name + ' ' + data.last_name;
			}
		},
		{ data: 'position' },
		{ data: 'office' },
		{ data: 'extn' },
		{ data: 'start_date' },
		{ data: 'salary', render: DataTable.render.number(null, null, 0, '$') }
	],
	layout: {
		topStart: {
			buttons: [
				{ extend: 'create', editor: editor },
				{ extend: 'edit', editor: editor },
				{ extend: 'remove', editor: editor }
			]
		}
	},
	select: true
});

var editor = new DataTable.Editor({
	ajax: '../php/staff.php',
	fields: [
		{
			label: 'First name:',
			name: 'first_name'
		},
		{
			label: 'Last name:',
			name: 'last_name'
		},
		{
			label: 'Show options:',
			name: 'options',
			type: 'select',
			options: ['Simple', 'All'],
			def: 'Simple'
		},
		{
			label: 'Position:',
			name: 'position'
		},
		{
			label: 'Office:',
			name: 'office'
		},
		{
			label: 'Extension:',
			name: 'extn'
		},
		{
			label: 'Start date:',
			name: 'start_date',
			type: 'datetime'
		},
		{
			label: 'Salary:',
			name: 'salary'
		}
	],
	table: '#example'
});

editor.dependent('options', function (val) {
	return val === 'Simple'
		? { hide: ['position', 'office', 'extn', 'start_date', 'salary'] }
		: { show: ['position', 'office', 'extn', 'start_date', 'salary'] };
});

new DataTable('#example', {
	ajax: '../php/staff.php',
	columns: [
		{
			data: null,
			render: (data) => data.first_name + ' ' + data.last_name
		},
		{ data: 'position' },
		{ data: 'office' },
		{ data: 'extn' },
		{ data: 'start_date' },
		{ data: 'salary', render: DataTable.render.number(null, null, 0, '$') }
	],
	layout: {
		topStart: {
			buttons: [
				{ extend: 'create', editor: editor },
				{ extend: 'edit', editor: editor },
				{ extend: 'remove', editor: editor }
			]
		}
	},
	select: true
});

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 interaction for this demo is shown below. This server uses PHP, so the PHP script is shown, however our download packages include the equivalent script for other platforms, including .NET and Node.js. Server-side scripts can be written in any language, using the protocol described in the Editor documentation.

Dependent fields

Other examples

Simple initialisation

Advanced initialisation

DataTables as an input

Dates and time

DataTables extensions

Inline editing

Bubble editing

API

Standalone

Styling

Plug-ins

DataTables