ldc-com-app-bo/app/Models/Directories.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Directories extends Model
{
    public function getParentsAttribute() {
        return $this->constructParents($this->parent);
    }

    private function constructParents($id, $parents = []) {
        $tmp = Directories::find($id);
        array_push($parents, $tmp);
        if ($tmp->parent != NULL) {
            return $this->constructParents($tmp->parent, $parents);
        }
        return array_reverse($parents);
    }

    public function documents()
    {
        return $this->hasMany(Documents::class, 'directory', 'id');
    }
}