Facebook Graph API class not found - facebook-graph-api

Question

I'm using the facebook graph api to get event information from a page.
I installed the Facebook SDK with composer but when I try to use a class in my controller it gives an error : Class 'Facebook\FacebookSession' not found.
use Facebook\FacebookSession;
use Facebook\FacebookRequest;
class HomeController extends BaseController {
public function index()
{
FacebookSession::setDefaultApplication('APP_ID', 'APP_SECRET');
$session = FacebookSession::newAppSession();
/* make the API call */
$request = new FacebookRequest(
$session,
'GET',
'/1531904510362357/'
);
$response = $request->execute();
$graphObject = $response->getGraphObject();
dd($graphObject);
}

Answer 1

Make sure you are using the Composer autoloader correctly.
You can see the instructions here https://getcomposer.org/doc/00-intro.md
Then make sure you are reporting on all errors. I would wrap my query in a try/catch block so you can catch any facebook exception as follows:
try {
$query = (new FacebookRequest(
$this->facebook, 'GET', '/me'
))->execute()->getGraphObject(GraphUser::className())
return $query;
} catch (FacebookRequestException $e) {
// The Graph API returned an error
return $e;
} catch (\Exception $e) {
// Some other error occurred
return $e;
}
Make sure to include the request exception class and graph user class too as follows:
use Facebook\GraphUser;
use Facebook\FacebookRequestException;