CakePHP switch database (using same datasource) on the fly?

Question

I have tried to build a small function that would be use in controller to switch database on the fly, i must use only one datasource.

On my database.php :

Answer 1

I just wanted to tell that nowadays it's really simple to change current model's datasource (database connection):

For example in my PersonsController index:

public function index() {

    //change to a different datasource which is already written in App/Config/database.php-file
    $this->Person->setDataSource('testdb2');
    $persons = $this->Person->find('all');
    $this->set('db1persons', $persons);

    //change to a different database
    $this->Person->setDataSource('testdb');
    $persons = $this->Person->find('all');
    $this->set('db2persons', $persons);
}

As you can see the key here is to use $this->Model->setDataSource()