ZF2 TableGateway doesn't works when insert a row - zend-framework2

Question

I've got a fatal error when I intent insert a row in DB. I don't understand what's happening, I readed some blogs but there is not a solution, my code is the same like an example publicated by Evan in his blog.
My model class
class CommentTable
{
protected $_commentTableGateway;
protected $_hydratator;
protected $_resultSet;
public function __construct($adapter)
{
$this->_hydratator = new \Zend\Stdlib\Hydrator\ClassMethods;
$rowObjectPrototype = new Comment();
$this->_resultSet = new \Zend\Db\ResultSet\HydratingResultSet($this->_hydratator, $rowObjectPrototype);
$this->_commentTableGateway = new TableGateway('comments', $adapter, null, $this->_resultSet );
}
public function fetchAll()
{
return $this->_commentTableGateway->select();
}
public function saveComment(Comment $comment)
{
$id = (int)$comment->getId();
if ($id == 0) {
$this->_commentTableGateway->insert($this->_hydratator->extract($comment));//this fails
} else {
if ($this->getComment($id)) {
$this->_commentTableGateway->update($data, array('id' => $id));
} else {
throw new \Exception('El comentario que queire editar no exite');
}
}
}
public function getComment($id)
{
$id = (int) $id;
$rowset = $this->_commentTableGateway->select(array('id' => $id));
$row = $rowset->current();
if (!$row) {
throw new \Exception("Could not find row $id");
}
return $row;
}
}
</code>
<code>
In module class:
//a factory in service manager
'Comment\Model\CommentTable' => function($sm) {
$dbAdapter = $sm->get('Zend\Db\Adapter\Adapter');
$table = new CommentTable($dbAdapter);
return $table;
},
</code>
<code>
My controller:
public function getCommentTable()
{
if (!$this->_commentTable) {
$sm = $this->getServiceLocator();
$this->_commentTable = $sm->get('Comment\Model\CommentTable');
}
return $this->_commentTable;
}
</code>
And I get this error:
Catchable fatal error: Object of class stdClass could not be converted to string in D:\xampp\htdocs\haystack\vendor\zendframework\zendframework\library\Zend\Db\Adapter\Driver\Pdo\Statement.php on line 258
I know the type of the error('stdClass could not be converted to string'), but I don't understand what's happening...
Any help is appreciated
Kind regards.

Answer 1

Hopefully this will help you out. Here is my TableGateway
class Domains extends AbstractTableGateway
{
public function __construct($adapter)
{
$this->table = 'domains';
$this->adapter = $adapter;
$this->initialize();
}
}
And here is how I insert data:
$this->getTableDomains()->insert(array(
'companyid' => $params['companyid'],
'domain_id' => $result->id,
'name' => $name,
'type' => strtoupper($params['type']),
'content' => strtolower($params['content']),
'ttl' => $ttl,
'prio' => $prio
));