Laravel - If has errors on validation, insert class in the specifics inputs - laravel

Question

I'm totally noob in PHP, but my question is, after the validation which has errors for specific inputs, how can I insert a class in the specific input?
Example, if i have this error in the validation: "The email field is required."
How can i insert a specific class in the email input?
Login routes:
Route::group(['prefix' => 'admin'], function () {
Route::get('/', 'Admin\AdminController#index');
Route::get('login', 'Admin\AuthController#getLogin');
Route::post('login', 'Admin\AuthController#postLogin');
Route::get('logout', 'Admin\AuthController#getLogout');
});
AdminController:
class AdminController extends AdminBaseController
{
public function index()
{
if(Auth::user()){
return view('admin/pages/admin/index');
}
return view('admin/pages/login/index');
}
}
AuthController:
class AuthController extends Controller
{
use AuthenticatesAndRegistersUsers, ThrottlesLogins;
private $redirectTo = '/admin';
public $loginPath = '/admin';
public function __construct()
{
$this->middleware('guest', ['except' => 'getLogout']);
}
public function getLogin()
{
if(Auth::user()){
return redirect('/admin');
}
return view('admin/pages/login/index');
}
public function postLogin(Request $request)
{
$this->validate($request, [
'email' => 'required|email',
'password' => 'required|min:6',
]);
}
}
My blade form:
<form class="s-form" role="form" method="POST" action="/admin/login">
<input type="hidden" name="_token" value="{{ csrf_token() }}">
<div class="s-form-item text">
<input type="text" name="email" value="{{ old('email') }}" placeholder="Email">
</div>
<div class="s-form-item text">
<input type="password" name="password" value="{{ old('password') }}" placeholder="Senha">
</div>
<div class="s-form-item">
#if ($errors->has())
<div class="alert alert-danger">
#foreach ($errors->all() as $error)
{{ $error }}<br>
#endforeach
</div>
#endif
</div>
<div class="s-form-item s-btn-group s-btns-right">
<input class="s-btn" type="submit" value="Entrar">
</div>
</form>

Answer 1

You can pass an argument to the has method to specify the specific key.
For example, for your email input...
<input class="#if($errors->has('email')) some-class #endif" ... >
I left out the rest of the input field for brevity. It basically checks if an error for the email input exists. If so, 'some-class' is outputted. Otherwise, it skips over it.
Edit: To answer the question on how you can customize where to output your error messages, you can use the get or first methods in conjunction with the has method. For example...
#if ($errors->has('email'))
#foreach ($errors->get('email') as $error)
<p>{{ $error }}</p>
#endforeach
#endif
The has method has already been explained. The get method retrieves the validation errors. Because there can be more than one validation error, you must loop through it and output it.
In the next example, I use first. This method just outputs the first error message so there is no need to loop through it.
#if ($errors->has('email'))
<p>{{ $errors->first('email') }}</p>
#endif