adrema/app/Course/Models/Course.php

<?php

namespace App\Course\Models;

use App\Nami\HasNamiField;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Course extends Model
{
    use HasFactory;
    use HasNamiField;

    public $timestamps = false;
    public $fillable = ['name', 'nami_id'];

    public function getShortNameAttribute(): string
    {
        return str($this->name)
            ->trim()
            ->replaceFirst('Baustein', '')
            ->trim()
            ->replaceMatches('/ - .*/', '');
    }

    /**
     * @return array<int, array{id: int, name: string}>
     */
    public static function forSelect(): array
    {
        return static::select('name', 'id')->get()->toArray();
    }
}