Sort relations

...
use LifeOnScreen\SortRelations\SortRelations;
...

class Product extends Resource
{
    public static $sortRelations = [
        // overriding id with product.id (this prevent ambiguous id, if you select multiple ids)
        'id'               => 'product.id',
        // overriding user relation sorting
        'user'         => [
            // sorting multiple columns
            'users.name',
            'users.surname',
        ],
        // overriding company relation sorting
        'company'          => 'company.name',
    ];
    
    public static function indexQuery(NovaRequest $request, $query)
    {
        // You can modify your base query here.
        return $query;
    }
}