How do I set up an adapter in zend framework 2? - database

Question

this is the content of the autoload/global.php file :
return array(
'db' => array(
'driver' => 'Pdo',
'dsn' => 'mysql:dbname=web_builder;host=localhost',
'driver_options' => array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES \'UTF8\''
),
),
'service_manager' => array(
'factories' => array(
'Zend\Db\Adapter\Adapter'
=> 'Zend\Db\Adapter\AdapterServiceFactory',
),
),
);
this is the content of the autoload/local.php file:
return array(
'db' => array(
'username' => 'DB_User_Name',
'password' => 'DB_Password',
,
); )
this is part of the content of module/Module.php :
namespace Application;
use Zend\Mvc\ModuleRouteListener;
use Zend\Mvc\MvcEvent;
use Zend\Db\Adapter\Adapter;
.........
public function getServiceConfig() {
return array(
'factories' => array(
'Application\Controller\UserController' => function($sm) {
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$table = new Model\StickyNotesTable($dbAdapter);
return $table;
},
),
);
}
Here I really don't understand what this function do, I just copy pasted from an example. If you could explain me what does getServiceConfig function do, I will really appreaciate it.
Finally the controller content:
namespace Application\Controller;
use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;
use Zend\Db\Adapter\Adapter;
use Zend\Db\TableGateway\AbstractTableGateway;
use Zend\Db\Sql\Select;
class UserController extends AbstractActionController{
public function __construct(Adapter $adapter) {
$this->adapter = $adapter;
}
public function loginAction(){
// here i just want to a simple select and yes I know queries will be executed
//in Model, but I want to here a simple query.
//For example in Codeigniter I can't do in model, controller, or view as well.
return new ViewModel();
}
The result of all this code is obviously an error:
Catchable fatal error: Argument 1 passed to Application\Controller\UserController::__construct() must be an instance of Zend\Db\Adapter\Adapter, none given, called in C:\xampp\htdocs\zf2\vendor\zendframework\zendframework\library\Zend\ServiceManager\AbstractPluginManager.php on line 170 and defined in C:\xampp\htdocs\zf2\module\Application\src\Application\Controller\UserController.php on line 21
Can someone post an answer to make this database or query stuff work ? thx