ZF2 on post update record (not working) - zend-framework2

Question

I am trying to update records in my database. I am following a book but something isnt working.
This is the edit action. On post form action leads to process action.
public function editAction()
{
$userTable = $this->getServiceLocator()->get('UserTable');
$user = $userTable->getUser($this->params()->fromRoute('id'));
$form = $this->getServiceLocator()->get('UserEditForm');
$form->bind($user);
$viewModel = new ViewModel(array(
'form' => $form,
'user_id' => $this->params()->fromRoute('id')
));
return $viewModel;
}
Process action
public function processAction()
{
// Get User ID from POST
$post = $this->request->getPost();
$userTable = $this->getServiceLocator()->get('UserTable');
// Load User entity
$user = $userTable->getUser($post->id);
// Bind User entity to Form
$form = $this->getServiceLocator()->get('UserEditForm');
$form->bind($user);
$form->setData($post);
// Save user
$this->getServiceLocator()->get('UserTable')->saveUser($user);
}
And this is the class UserTable with function save user:
public function saveUser(User $user)
{
$data = array(
'email' => $user->email,
'name' => $user->name,
'password' => $user->password,
);
$id = (int)$user->id;
if ($id == 0) {
$this->tableGateway->insert($data);
} else {
if ($this->getUser($id)) {
$this->tableGateway->update($data, array('id' => $id));
} else {
throw new \Exception('User ID does not exist');
}
}
}
There is no error showing. It passes $this->tableGateway->update and just nothing !
EDIT: I can delete users, add users.

Answer 1

u miss this
if ($form->isValid()) {
$this->getServiceLocator()->get('UserTable')->saveUser($form->getData());
}
After validation you can now retrieve validate form data with $form->getData().
Also note that because of binding entity to form via $form->bind($user) $form->getData() is an instance of User
Hope it helps ;)

Answer 2

I dont know why but i must check if form is valid.
if($form->isValid()){
// do the save
}