为什么不删除Laravel 5中的表记录？

Working with Laravel and has table called as vehicles and I need delete table records who are logged with the app and related to create records with logged user. I am showing logged user records with following:

Vehicle model:

public function scopePersonal($query)
{
     return $query->where('user_id', Auth::user()->id);
}

VehcicleController:

public function indexpersonel()
{
    $vehicles = Vehicle::personal()->get();
    return view('vehicles.myads')->withVehicles($vehicles);
}

My ads delete buttons link:

<td><a class="button is-outlined" href="/myads/{{$vehicule->id}}/delete" onclick="return confirm('Are you sure to want to delete this record?')" >Delete</a></td>

Vehicle controller delete function:

public function deleteOneAd($id)
{
    DB::table('vehicles')
        ->where('id', $id)
        ->delete();
    return redirect()->back();
}

But when I clicked delete button and accept javascripts popup it is not deleting vehicles table records. How can I fix this problem?