Can't get session variables in AppServiceProvider - php

Question

I would like to share some variables from session in all views in Laravel 8. According to documentation I call View::share() method in AppServiceProvider:
<?php
namespace App\Providers;
use Illuminate\Support\Facades\View;
use Illuminate\Support\ServiceProvider;
class AppServiceProvider extends ServiceProvider
{
public function register()
{
//
}
public function boot()
{
// Variables shared in all views.
View::share('showModal', session('showModal'));
}
}
The problem is that although the session showModal key is really set, I can't get it in AppServiceProvider::boot(). If I call session('showModal') in the controller on in view I can see the correct value. Only AppServieProvider returns null.
Can somebody explain please what is wrong with this code?

Answer 1

Well, alternatively, you could set up a middleware to be responsible for updating your session variable before the call in view.
Below is something I implemented for setting/retrieving the user permissions before the call in view.
STEP 1
Generate the middleware: php artisan make:middleware GetPermissions
You will find the middleware in App\Http\Middleware directory.
STEP 2
Add your logic for setting your session variable in the new middleware's handle method.
<?php
namespace App\Http\Middleware;
use Closure;
use Illuminate\Http\Request;
class GetPermissions
{
/**
* Handle an incoming request.
*
* #param \Illuminate\Http\Request $request
* #param \Closure $next
* #return mixed
*/
public function handle(Request $request, Closure $next)
{
$request->session()->put("permissions", optional(auth()->user(), function ($user) {
return $user->permissions()->pluck("name")->toArray();
}) ?? []);
return $next($request);
}
}
STEP 3
Register your middleware in the protected $middlewareGroups array of App\Http\Kernel.php class file.
<?php
namespace App\Http;
use Illuminate\Foundation\Http\Kernel as HttpKernel;
class Kernel extends HttpKernel
{
// ...
protected $middlewareGroups = [
'web' => [
// ...
\App\Http\Middleware\GetPermissions::class,
],
// ...
}
With that setup, every time a request is made, the latest values of your session variable will be set.
You will then have access to latest session variable value in your helperfiles, controllers as whereas views.
Demo for accessing it in views:
{{session("permissions")}}