如何将数据保存到CakePHP中的两个数据库中

Question

In my app/Config/database.php I have a setup which looks like this,

public $default = array(
    'datasource' => 'Database/Mysql',
    'persistent' => false,
    'host' => 'localhost',
    'login' => 'root',
    'password' => '',
    'database' => 'default_db',
    'prefix' => '',
    //'encoding' => 'utf8',
);

public $second = array(
    'datasource' => 'Database/Mysql',
    'persistent' => false,
    'host' => 'localhost',
    'login' => 'root',
    'password' => '',
    'database' => 'second_db',
    'prefix' => '',
    //'encoding' => 'utf8',
);

Now what I wanted was to simultaneously save the data, wherever and whenever I am saving any kind of data. This databases are identical, that is why I want to save the data to both databases to maintain them being identical. Where would I edit such that all the save/edit/update/delete processes will both save to both databases. Thank you in advance.

EDIT

in my lib/Cake/Model/Model.php is a line of code which looks like this

/**
* The name of the DataSource connection that this Model uses
*
* The value must be an attribute name that you defined in `app/Config/database.php`
* or created using `ConnectionManager::create()`.
*
* @var string
* @link http://book.cakephp.org/2.0/en/models/model-attributes.html#usedbconfig
*/
public $useDbConfig = 'default';

is there where I should start editing to be able to save the data into two databases? Thanks.

Answer 1

Doing this through CakePHP is slow and not necessary, why aren't you using a feature like DB replication? However, you can change the connection the model us using through the model property useDbConfig.

$this->save($data);
$this->useDbConfig = 'second';
$this->save($data, array('callbacks' => false, 'validate' => false);
$this->useDbConfig = 'default';

You could add the last three lines of the above code to your Model::afterSave() callback, or much better, do it via a behavior and attach it to each model that needs it.