Error : undefined variable in laravel view

Question

I am getting this error: undefined variable. I read a lot of posts about it but, none of them helped with the problem i am facing. (Why I get "Undefined variable" in Laravel view? )

This is Project_Controller :

class Project_Controller extends Controller
{

public function create()
{
$arrondissement = Arrondissements::pluck('arrondissement', 'id');

return view::make('projets.create', compact('arrondissement'));
}

public function store(Request $request)
{

    $validator = Validator::make($request->all(), [
        'intitule' => 'required|max:255',
        'code' => 'required|max:255',
        'dateDebut' => 'required|max:255',
        'dateFin' => 'required|max:255',
        'estimation' => 'required|max:255',
        'arrondissement' => $request->arrondissement,
    ]);     
if ($validator->fails()) {
    return back()
        ->withInput()
        ->with(['arrondissement'=>$arrondissement])
        ->withErrors($validator);
}               
    $projet = new Projet;

    $projet->intitule = $request->intitule;
    $projet->code = $request->code;
    $projet->dateDebut = $request->dateDebut;
    $projet->dateFin = $request->dateFin;
    $projet->estimation = $request->estimation;
    $projet->arrondissement = $request->arrondissement;


    $projet->save();

     return view('/submit', compact('arrondissement'));     
}
}

submit.blade.php :

    <select name="arrondissement_id">
        @if (!empty($arrondissement))                   
            Whoops! Something went wrong                
        @else
            @foreach($arrondissement as $id => $arrondissement)
                <option value="{{$id}}">{{$arrondissement}}</option>                    
            @endforeach
        @endif
</select>

and this is routes.php :

Auth::routes();

Route::get('/home', 'HomeController@index');

Route::get('/', function () {
   $projets = \App\Projet::all();
   return view('welcome', compact('projets'));
});

Route::get('/submit', function () {
return view('submit');
});

Route::post('submit/projects', 'Project_Controller@store');

I can't see what's causing this error ??

I am using 'arrondissement' as a foreign key of table 'arrondissements'

Answer 1

I solved the problem. It's simple, I had to remove exclamation mark. Because, I need to test if the value is empty not unempty.