Laravel 5.2-与所有视图共享数据

Question

i have a header-user menu logged, each user registered have a balance import, i would like show this balance in my header section user logged, i'm tryng to use VIEW SHARE, like this but it doesn't work well:

class AppServiceProvider extends ServiceProvider
{

    public function boot()
    {
        //its just a dummy data object.
        $balance = UserBalance::where('user_id', Auth::id())->first();

        // Sharing -  the error interested this section: 
        view()->share('balance', $balance->balance);
    }

}

MY ERROR

ErrorException in AppServiceProvider.php line 23: Trying to get property of non-object

line 23 : view()->share('balance', $balance->balance);

MENU USER SECTION (inside my layout for all views):

@if (Auth::guest())
          <li><a href="{{ url('login')}}">Accedi</a></li>
          <li class="item-custom"><a href="{{url('register')}}">Registrati</a></li>
           @else
           <li class="hello-user">
           Ciao {{Auth::user()->name}}
           </li>
           <li> Your Balance: {{$balance}}</li>
@endif

Thank you for your help!

Answer 1

It may not be the best answer, but have you considered storing the results in the Session?

The session can be checked and read by any view.

if ($request->session()->has('balance')) {
     $request->session()->get('balance', 0);
}

Answer 2

Check the user is logged in or not. If user not authenticate than Auth::user()->id can't be exists and you also need to check $balance . If the query return null than the error will be show.

ErrorException in AppServiceProvider.php line 23: Trying to get property of non-object

Try this:

class AppServiceProvider extends ServiceProvider
{

    public function boot()
    {
        if(Auth::check()){
           //its just a dummy data object.
           $balance = UserBalance::where('user_id', Auth::user()->id)->first();

            // Sharing -  the error interested this section: 
            view()->share('balance', (count($balance) > 0) ? $balance->balance : 0);
        }
    }

}

Answer 3

Your Auth::id() return null or it does not retrieve session id. Because Laravel session is handled using session middleware and all middleware is executed before AppserviceProvider. As a result it does not retrieve session id.You can use this code. Because view()->composer clouser will be executed when the view is composed. Then you can use session id

        public function boot()
        {
            $this->getBalance();
        }

        public function getBalance()
        {
            view()->composer('*', function ($view) {
                    $balance = UserBalance::where('user_id', Auth::id())->first();
                    View()->share('balance', $balance->balance);
            });

        }