Opd.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Model;

class Opd extends Model
{
    protected $table = 'master_kantor';

    public function child()
    {
        return $this->hasMany('App\Model\Opd', 'kdparent', 'kdlokasi');
    }

    public function parent()
    {
        return $this->belongsTo('App\Model\Opd', 'kdparent', 'kdlokasi');
    }

    public function childRecursive()
    {
        return $this->child()->with('childRecursive');
    }

    public function getChildrensWithParent()
    {
        return $this->getChildrens($this->childRecursive);
    }

    public function getChildrens($obj)
    {
        $obj   = json_decode(json_encode($obj));
        $child = new Collection;

        if (gettype($obj) == 'array') {
            foreach ($obj as $item) {
                $arr = $this->getChildrens($item);
                foreach ($arr as $itm) {
                    $child->push($itm);
                }
            }
        } else {
            if (count($child) <= 0) {
                $child->push($obj->kdparent);
            }
            $child->push($obj->kdlokasi);

            if ($obj->child_recursive && count($obj->child_recursive) > 0) {
                $rec = $this->getChildrens($obj->child_recursive);
                foreach ($rec as $item) {
                    $child->push($item);
                }
            }
        }

        return $child;
    }

}