laravel 5.5 数据存入session，会出现Session store not set on request.错误。查了下laravel 5.5将session放到global middleware中,需要laravel的文件 ./app/Http/Kernel.php中的加上一句：
\Illuminate\Session\Middleware\StartSession::class, protected $middleware = [ \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class, \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class, \App\Http\Middleware\TrimStrings::class, \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class, \App\Http\Middleware\TrustProxies::class, \Illuminate\Session\Middleware\StartSession::class, ];
再写设置session方法：
public function setSession(Request $request) {
if ($request->session()->exists('site')) {
return 'exist site session';
}
else{
$request->session()->put('site', 'LaravelAcademy.org');
return 'save site session';
}
}
获得session方法：
public function getSession(Request $request) {
if ($request->session()->exists('site')) {
return $request->session()->get('site');
}
else{
echo "no site session";
return null;
}
}