i cant fully understand the models in MVC.

so i am using symfony with doctrine. the doctrine models are created.

does this mean that i don't have to create any models? are the doctrine models the only models i need?

where should i put the code that uses the doctrine models:

eg.

$phoneIds = array();

$phone1 = new Phonenumber();
$phone1['phonenumber'] = '555 202 7890';
$phone1->save();

$phoneIds[] = $phone1['id'];

$phone2 = new Phonenumber();
$phone2['phonenumber'] = '555 100 7890';
$phone2->save();

$phoneIds[] = $phone2['id'];

$user = new User();
$user['username'] = 'jwage';
$user['password'] = 'changeme';
$user->save();

$user->link('Phonenumbers', $phoneIds);

should this code be in the controller or in another model?

and where should i validate these fields (check if it exists in database, that email is email etc)?

could someone please shed a light on this.

thanks.