ZF2 use multiple TableGatway in Single module - php

Question

I have one problem. I don't know how to use multiple table and join query in zf2.
I'm using service Manager and TableGateway for model. But in this it always use single table.
How can I use multiple table in single controller or model?
Here I'm using Module.php file and configure table gateway.
When I add another table gateway then it gives me errors.
public function getServiceConfig()
{
return array(
'factories' => array(
'User\Model\UserTable' => function($sm) {
$tableGateway = $sm->get('UserTableGateway');
$table = new UserTable($tableGateway);
return $table;
},
'UserTableGateway' => function ($sm) {
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new ResultSet();
$resultSetPrototype->setArrayObjectPrototype(new User());
return new TableGateway('user', $dbAdapter, null, $resultSetPrototype);
},
),
);
}
I need to insert userItems in user controller by using UseritemTable.php under the User/Model/UseritemTable. How I can achieve this?
Error message
Zend\Mvc\Controller\PluginManager::get was unable to fetch or create an instance for getUseritemTable
Updated Module.php
public function getServiceConfig()
{
return array(
'factories' => array(
'User\Model\UserTable' => function($sm) {
$tableGateway = $sm->get('UserTableGateway');
$table = new UserTable($tableGateway);
return $table;
},
'UserTableGateway' => function ($sm) {
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new ResultSet();
$resultSetPrototype->setArrayObjectPrototype(new User());
return new TableGateway('user', $dbAdapter, null, $resultSetPrototype);
},
'User\Model\UseritemTable' => function($sm) {
$tableGateway = $sm->get('UseritemTableGateway');
$table = new UseritemTable($tableGateway);
return $table;
},
'UseritemTableGateway' => function ($sm) {
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$resultSetPrototype = new ResultSet();
$resultSetPrototype->setArrayObjectPrototype(new Useritem());
return new TableGateway('useritem', $dbAdapter, null, $resultSetPrototype);
},
),
);
}
UserController.php under this userItemAction
public function userItemAction()
{
$form->get('submit')->setValue('Add');
$request = $this->getRequest();
if ($request->isPost()) {
$item = new Useritem();
$data = $request->getPost()->toArray();
$form->setData($data);
if($form->isValid()){
$item->exchangeArray($form->getData());
$this->getUseritemTable()->saveItem($item); // while saveItem cause error using getUseritemTable()
}
}
return array('form' => $form);
}
Here my code for User\Model\UseritemTable.php
namespace User\Model;
use Zend\Db\TableGateway\TableGateway;
class UseritemTable
{
protected $tableGateway;
public function __construct(TableGateway $tableGateway)
{
$this->tableGateway = $tableGateway;
}
public function fetchAll()
{
$resultSet = $this->tableGateway->select();
return $resultSet;
}
public function saveItem(User $item)
{
$this->tableGateway->insert($item);
}
}