我如何检查是否有可变的laravel?

我认为我试图通过 $ reservations 时，数据库中有一些保留，没有错误，但是当它为空时，我得到了错误

i have this on my view im trying to pass $reservations when there is some reservations in DB there is no error but when it is empty i got error

未定义变量:保留(查看:C:\ Users \ yass \ Desktop \ E-tourisme-44 \ E-tourisme-5554 \ resources \ views \ moderateur \ reservation.blade.php)

Undefined variable: reservations (View: C:\Users\yass\Desktop\E-tourisme-44\E-tourisme-5554\resources\views\moderateur\reservation.blade.php)

模板

<tbody>
                        @if($reservations )

                        @foreach($reservations as $reservation)

                            <tr>      
                                <td> {{$reservation->children}} </td>
                                <td> {{$reservation->checkin}} </td>
                                <td> {{$reservation->checkout}} </td>
                                <td>

                        @endforeach
                       @else
                                    <div>
                                       No Data
                                    </div>
                            @endif

                        </tbody>

这是我的功能

public function index()
{
    $myhotels = hotel::where('created_by', Auth::user()->id)->first();
    if ($myhotels) {
        $reservations = Reservation::where('hotel_id', $myhotels->id)->get();
        return view('moderateur/reservation', compact('reservations'));
    }
    return view('moderateur/reservation');
}