For Rutorika\Sortable to fix position field before deleting eloquent

SortableFixTrait.php

<?php
/**
 * For Rutorika\Sortable to fix position field before deleting eloquent
 */

namespace App\Traits;


trait SortableFixTrait
{
    public static function bootSortableFixTrait()
    {
        static::deleting(
            function ($model) {
                /* @var Model $model */
                $sortableField = static::getSortableField();
                $query = static::applySortableGroup(static::on(), $model);
                $models = $query->where('id', '<>', $model->id)->sorted()->get();

                $position = 1;

                foreach($models as $key => $model){
                    $model->update([$sortableField => $position]);
                    $position++;
                }
            }
        );
    }
}