Why did not delete table records in Laravel 5?

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);

}

and VehcicleController

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

and my ads delete buttons link

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

and 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?

via Chebli Mohamed