1. Go to this page and download the library: Download davidyell/listing library. Choose the download type require.
2. Extract the ZIP file and open the index.php.
3. Add this code to the index.php.
<?php
require_once('vendor/autoload.php');
/* Start to develop here. Best regards https://php-download.com/ */
public $actsAs = array(
'Listing.Listable' => array(
'relatedModelName' => 'Provider', // Example - this should be the parent model, the one you want to group by
'relatedModelPrimaryKey' => 'id', // optional - default shown
'relatedModelDisplayField' => 'name', // optional - default shown
)
);