CakePHP 2.3.x database transaction - cakephp

Question

I need your help using transactions in CakePHP.
I have a Product model, with clause hasMany to Price and Property models (key product_id).
In my Product model, I add
function begin() {
$db =& ConnectionManager::getDataSource($this->useDbConfig);
$db->begin($this);
}
function commit() {
$db =& ConnectionManager::getDataSource($this->useDbConfig);
$db->commit($this);
}
function rollback()
{
$db =& ConnectionManager::getDataSource($this->useDbConfig);
$db->rollback($this);
}
And in ProductController I use save() to save my Product, and then my Price and Property. (I use only save(), not saveAll() ).
My code is:
$this->Product->begin();
$error = false;
if($this->Product->save($data)
{
//my functions and calculations
if(!$this->Price->save($data_one)
{
$error = true;
}
//calculations
if(!$this>Property->save($my_data)
{
$error = true;
}
}
if($error) {
$this->Product->rollback();
}
else
{
$this->Product->commit();
}
The problem is that if I have an error inside the save Price or Property row, the Product is still added. I would have thought that when I have any errors, none of my rows would be added (i.e. a rollback would delete it).
I am using CakePHP 2.3.8

Answer 1

Tables must be in InnoDb format. MyISAM format of tables doesn't support transactions.
No need to insert additional code into model.
ProductController:
$datasource = $this->Product->getDataSource();
try {
$datasource->begin();
if(!$this->Product->save($data)
throw new Exception();
if(!$this->Price->save($data_one)
throw new Exception();
if(!$this->Property->save($my_data)
throw new Exception();
$datasource->commit();
} catch(Exception $e) {
$datasource->rollback();
}