Looking for a Silex Exception Override
-
11-04-2021 - |
Question
Silex seems to hijack the exceptions thrown anywhere in the app. My problem with this is I have a user_db_interface class I use to pass/get user data from my database that is basically ignored once an exception is thrown.
For example if I have a duplicate user email entry that generates a PDOException, instead of being able to handle that exception within my class, I have to add an error handling closure outside of my class. I'd rather deal with the exception internally so that I can act on this exception and continue with my script.
Any such thing as an exception override or bypass?
Here is an example:
###### PROVIDER REG #######
// I'M LOADING DOCTRINE "NATURALLY" AND NOT REGISTERING IT WITH $APP IN HOPES OF
// AVOIDING THE EXCEPTION HIJACKING.
################################################################### LOAD DOCTRINE NATURAL
require 'vendor/Doctrine/Common/ClassLoader.php';
$classLoader = new \Doctrine\Common\ClassLoader('Doctrine', __DIR__ . '/../vendor');
$classLoader->register();
$connectionOptions = array(
'driver' => 'pdo_mysql',
'dbname' => 'MY_DB',
'host' => 'localhost',
'password' => 'MY_PASS',
'user' => 'MY_USER',
);
$driver = new \Doctrine\DBAL\Driver\PDOMySql\Driver;
$connection = new \Doctrine\DBAL\Connection($connectionOptions, $driver);
###################################################################### LOAD MY EXTENSION
$app['autoloader']->registerNamespaces(array('TableTrackPro' => __DIR__,));
$app->register(new TableTrackPro\ClientDBInterfaceExtension(),array('app'=>$app));
$app['client_db_interface']->set_connection($connection);
##################################################
##################################################
################################################# MY DB INTERFACE CLASS (stripped for clarity)
namespace TableTrackPro;
class ClientDBInterface{
private $_connection;
public function set_connection($connection){
$this->_connection = $connection;
}
public function insert_client($clientInfo){
// SET RETURN OBJECT
$returnObject['status'] = 'ok'; // default return status
$returnObject['message'] = false;
// SANITIZE CLIENT INFO ETC...
// THIS IS WHERE I WOULD LIKE TO HANDLE MY OWN EXCEPTIONS
try{
$this->_connection->insert('clients', $clientInfo);
}catch(PDOException $e){
// HANDLE EXCEPTION HERE
}
return json_encode($returnObject);
}
#### END CLASS #####
### CONTROLLERS ####
$app->post('/postNewClient', function () use($app){
$clientInfo = $_POST;
$returnObject = $app['client_db_interface']->insert_client($clientInfo);
return json_encode($returnObject); // <-- I handle this object with javascript via an AJAX call
});
Instead of handling the PDOException in my class so that I can return data as I wish, I have to add an error handler to the controller area like:
$app->error(function (\Exception $e, $code) {
// error handling code, I'd now have to handle any client-db specific errors outside of my client_db class...
});
I'd like to avoid this because if the exception handling were internal to the client_db class, I would know that the error was also specific to that action and I wouldn't have to write an error parser.
Solution
Alright, so the only thing silex does is catch the exception during the $app->run()
call. There is nothing in there preventing you from catching the exception yourself earlier.
I suspect that your issue is caused by the following. Assuming your code is actually:
try{
$this->_connection->insert('clients', $clientInfo);
}catch(PDOException $e){
// HANDLE EXCEPTION HERE
}
Well, the issue is that you're in a namespaced class. This means that all class names are relative to the current namespace. To reference the global namespace you need to use
them or prefix them with \
.
What you need to do is:
try{
$this->_connection->insert('clients', $clientInfo);
}catch(\PDOException $e){
// HANDLE EXCEPTION HERE
}
Does this solve your problem?