如何在Laravel中限制跨度类项目列表

php artisan make:model Project

use App\Models\Project;

class ProjectController extends Controller
{
    public function index()
    {
        $projects = Project::where('type', 'span')->get();
        
        return view('projects.index', ['projects' => $projects]);
    }
}

use App\Models\Project;

class ProjectController extends Controller
{
    public function index()
    {
        $types = ['span', 'bridge', 'tunnel'];
        $projects = Project::whereIn('type', $types)->get();
        
        return view('projects.index', ['projects' => $projects]);
    }
}