Laravel 5.3 LoginController - Header可能不包含多个标题，检测到新行

Question

我在登录后更改默认的LoginController重定向时遇到问题，我得到了一个

ErrorException in Response.php line 339:
Header may not contain more than a single header, new line detected

我已经尝试了一切，但它只是不起作用，代码是：

class LoginController extends Controller
{

protected $redirectTo = '/home';

protected function redirectTo()
{
    if (\Auth::check()) {
       $user_id = \Auth::id();
       $usuario = users::where('id','=',$user_id)->first();
       if($usuario->hasRole('copy')){
           return redirect('/copy/dashboardCopy');
        }
    } 
}

/**
 * Create a new controller instance.
 *
 * @return void
 */
public function __construct()
{
    $this->middleware('guest', ['except' => 'logout']);
}
}

根据Laravel文档，该方法的优先级高于属性，因此我认为保留class属性是可以的。

而且，我已经检查过，代码实际上达到了最后的状态。

Answer 1

redirectTo方法应返回url路径，而不是Redirect响应。

...
protected function redirectTo()
{
    if(\Auth::user()->hasRole('copy')){
        return '/copy/dashboardCopy';
    }       
}
...

Answer 2

我刚刚解决了它取代原始代码的问题

class LoginController extends Controller
{
/*
|--------------------------------------------------------------------------
| Login Controller
|--------------------------------------------------------------------------
|
| This controller handles authenticating users for the application and
| redirecting them to your home screen. The controller uses a trait
| to conveniently provide its functionality to your applications.
|
*/

use AuthenticatesUsers;

/**
 * Where to redirect users after login.
 *
 * @var string
 */
protected $redirectTo;

protected function redirectTo()
{
    if(\Auth::user()->hasRole('copy')){
        $this->redirectTo = '/copy/dashboardCopy';
        return $this->redirectTo;
    }       
}

/**
 * Create a new controller instance.
 *
 * @return void
 */
public function __construct()
{
    $this->middleware('guest', ['except' => 'logout']);
}
}

Answer 3

public $redirectTo = '/lender/home';

protected function redirectTo()
{
    if(\Auth::guard('lender')->check()){
      $this->redirectTo = '/lender/home';
      return $this->redirectTo;
    }
}