course-site/app/Repositories/Models/Base/Menu.php

<?php

namespace App\Repositories\Models\Base;

use App\Repositories\Models\Model;
use Illuminate\Support\Facades\App;
use Prettus\Repository\Contracts\Transformable;
use Prettus\Repository\Traits\TransformableTrait;

/**
 * Class Menu.
 *
 * @package namespace App\Repositories\Models\Base;
 */
class Menu extends Model implements Transformable
{
    use TransformableTrait;

    protected $table = 'base_menus';

    protected $casts = ['meta' => 'array'];

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $guarded = [];

//    protected static function booted()
//    {
//        self::language();
//    }

    public function parent()
    {
        return $this->belongsTo(Menu::class, 'parent_id', 'id');
    }

    public function getParentNameAttribute()
    {
        return Menu::query()->where('id', $this->attributes['parent_id'])->value('name') ?? '--';
    }

    public function getMetaAttribute()
    {
        $meta = js2php($this->attributes['meta']);
        if (App::getLocale() == 'en') {
            $meta['title'] = $this->attributes['zh_title'];
        } else {
            $meta['title'] = $this->attributes['en_title'];
        }
        return $meta;
    }

}