Question

我收到此错误：未定义的变量。我读了很多关于它的帖子，但是，他们都没有帮助解决我面临的问题。（Why I get "Undefined variable" in Laravel view?）

这是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>

这是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');

我看不出是什么导致了这个错误？

我使用'arrondissement'作为表'arrondissements'的外键

Answer 1

返回视图时，还应该使用data：

传递变量

$arrondissement = ....

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

Answer 2

我解决了这个问题。这很简单，我不得不删除感叹号。因为，我需要测试值是否为空而不是空。

Answer 3

$arrondissement = Arrondissements::pluck('arrondissement', 'id');

您还应该将此行添加到商店功能

错误：laravel视图中的未定义变量

3 个答案: