Laravel local.ERROR:在/app/Listeners/newuserregisted/CreateBoatUserRole.php:35中调用null上的成员函数users（）

对不起，我英语不好，瑞典语是我的主要语言

我正在努力找出错误。但这是我要弄清楚的

我是拉威尔的新手，但我想弄清楚问题出在哪里

[2020-03-11 19:30:31] local.ERROR: Symfony\Component\Debug\Exception\FatalThrowableError: Call to a member function users() on null in /var/www/html/app/Listeners/NewUserRegistered/CreateBoatUserRole.php:35
Stack trace:
#0 [internal function]: App\Listeners\NewUserRegistered\CreateBoatUserRole->handle(Object(App\Events\NewUserRegistered))
#1 /var/www/html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(347): call_user_func_array(Array, Array)
#2 [internal function]: Illuminate\Events\Dispatcher->Illuminate\Events\{closure}(Object(App\Events\NewUserRegistered))
#3 /var/www/html/vendor/laravel/framework/src/Illuminate/Events/Dispatcher.php(221): call_user_func_array(Object(Closure), Array)
#4 /var/www/html/vendor/laravel/framework/src/Illuminate/Support/Facades/Facade.php(217): Illuminate\Events\Dispatcher->fire('App\\Events\\NewU...')
#5 /var/www/html/app/Http/Controllers/User/RegistrationController.php(63): Illuminate\Support\Facades\Facade::__callStatic('fire', Array)
#6 [internal function]: App\Http\Controllers\User\RegistrationController->postRegister(Object(Illuminate\Http\Request))
#7 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Controller.php(80): call_user_func_array(Array, Array)
#8 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(146): Illuminate\Routing\Controller->callAction('postRegister', Array)
#9 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(94): Illuminate\Routing\ControllerDispatcher->call(Object(App\Http\Controllers\User\RegistrationController), Object(Illuminate\Routing\Route), 'postRegister')
#10 [internal function]: Illuminate\Routing\ControllerDispatcher->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#11 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(52): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#12 /var/www/html/app/Http/Middleware/SentinelRedirectIfAuthenticated.php(42): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#13 [internal function]: App\Http\Middleware\SentinelRedirectIfAuthenticated->handle(Object(Illuminate\Http\Request), Object(Closure))
#14 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#15 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#16 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#17 [internal function]: Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#18 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#19 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(96): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#20 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php(54): Illuminate\Routing\ControllerDispatcher->callWithinStack(Object(App\Http\Controllers\User\RegistrationController), Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request), 'postRegister')
#21 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php(174): Illuminate\Routing\ControllerDispatcher->dispatch(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request), 'App\\Http\\Contro...', 'postRegister')
#22 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Route.php(140): Illuminate\Routing\Route->runController(Object(Illuminate\Http\Request))
#23 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(724): Illuminate\Routing\Route->run(Object(Illuminate\Http\Request))
#24 [internal function]: Illuminate\Routing\Router->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#25 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(52): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#26 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/VerifyCsrfToken.php(64): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#27 [internal function]: Illuminate\Foundation\Http\Middleware\VerifyCsrfToken->handle(Object(Illuminate\Http\Request), Object(Closure))
#28 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#29 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#30 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#31 /var/www/html/vendor/laravel/framework/src/Illuminate/View/Middleware/ShareErrorsFromSession.php(49): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#32 [internal function]: Illuminate\View\Middleware\ShareErrorsFromSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#33 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#34 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#35 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#36 /var/www/html/vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(64): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#37 [internal function]: Illuminate\Session\Middleware\StartSession->handle(Object(Illuminate\Http\Request), Object(Closure))
#38 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#39 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#40 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#41 /var/www/html/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/AddQueuedCookiesToResponse.php(37): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#42 [internal function]: Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse->handle(Object(Illuminate\Http\Request), Object(Closure))
#43 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#44 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#45 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#46 /var/www/html/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php(59): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#47 [internal function]: Illuminate\Cookie\Middleware\EncryptCookies->handle(Object(Illuminate\Http\Request), Object(Closure))
#48 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#49 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#50 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#51 [internal function]: Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#52 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#53 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(726): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#54 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(699): Illuminate\Routing\Router->runRouteWithinStack(Object(Illuminate\Routing\Route), Object(Illuminate\Http\Request))
#55 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Router.php(675): Illuminate\Routing\Router->dispatchToRoute(Object(Illuminate\Http\Request))
#56 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(246): Illuminate\Routing\Router->dispatch(Object(Illuminate\Http\Request))
#57 [internal function]: Illuminate\Foundation\Http\Kernel->Illuminate\Foundation\Http\{closure}(Object(Illuminate\Http\Request))
#58 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(52): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#59 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Middleware/CheckForMaintenanceMode.php(44): Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#60 [internal function]: Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode->handle(Object(Illuminate\Http\Request), Object(Closure))
#61 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(136): call_user_func_array(Array, Array)
#62 [internal function]: Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure}(Object(Illuminate\Http\Request))
#63 /var/www/html/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#64 [internal function]: Illuminate\Routing\Pipeline->Illuminate\Routing\{closure}(Object(Illuminate\Http\Request))
#65 /var/www/html/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php(102): call_user_func(Object(Closure), Object(Illuminate\Http\Request))
#66 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(132): Illuminate\Pipeline\Pipeline->then(Object(Closure))
#67 /var/www/html/vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(99): Illuminate\Foundation\Http\Kernel->sendRequestThroughRouter(Object(Illuminate\Http\Request))
#68 /var/www/html/public/index.php(53): Illuminate\Foundation\Http\Kernel->handle(Object(Illuminate\Http\Request))
#69 /var/www/html/server.php(21): require_once('/var/www/html/p...')
#70 {main}

这是新用户CreateBoatUserRole

public function handle(NewUserRegistered $event)
    {
        $user = $event->user;

        // Assign the user role to the users
        $userRole = Sentinel::findRoleBySlug('user');
        $userRole->users()->attach($user);

        //insert into profile table
        $boat_user = new \App\BoatUserProfile;
        $boat_user->user_id = $user->id;
        $boat_user->save();
    }

我到处都在找，但是我找不到正确的答案，所以现在我希望你能帮助我

截止日期： 我自己设法解决了这个问题，但奇怪的是，当我注册一个用户时，我收到一封激活邮件，我激活了它

但当我尝试登录时，它会说**对不起！用户名和/或密码不正确**

---

可能是因为它没有向db添加api_令牌。

问题在于您没有处理空值的情况：

// Assign the user role to the users
$userRole = Sentinel::findRoleBySlug('user');

if (null === $userRole) {
    // do something here so the code
    // after the block doesn't fail
    abort(404, "Unable to find a role by slug"); // <-- example
}

//将用户角色分配给用户
$userRole=Sentinel:：findRoleBySlug（'user'）；
if（null==$userRole）{
//在这里做点什么，这样代码
//在块没有失败之后
中止（404，“无法通过slug找到角色”）//