// User Model:

class User extends AppModel {
	var $actsAs = array('Containable');

	public $belongsTo = array(
		'Company' => array(
			'className' => 'Company',
			'foreignKey' => 'company_id'
		)
	);

	public $hasOne = array(
		'Membership' => array(
			'className' => 'Membership',
			'foreignKey' => 'user_id',
			'dependent' => false
		)
	);
}

// Company Model:

class Company extends AppModel {
	var $actsAs = array('Containable');
	public $displayField = 'name';

	public $hasMany = array(
		'User' => array(
			'className' => 'User',
			'foreignKey' => 'company_id',
			'dependent' => false
		)
	);

}

// Membership:

class Membership extends AppModel {
	var $actsAs = array('Containable');

	public $belongsTo = array(
		'User' => array(
			'className' => 'User',
			'foreignKey' => 'user_id'
		)
	);
}

// Example Data:
$this->User->contain('Company', 'Membership);
$users = $this->User->find('all');

(int) 2 => array(
		'User' => array(
			'password' => '*****',
			'id' => '10',
			'company_id' => '0',
			'company_contact' => '',
			'email' => 'a@a.com',
		),
		'Company' => array(
			'id' => null,
			'name' => null,
			'email' => null,
			'contact_name' => null,
			'contact_number' => null,
			'contact_email' => null,
			'created' => null
		),
		'Membership' => array(
			'id' => null,
			'user_id' => null,
			'membership_type_id' => null,
			'created' => null,
			'expires' => null,
			'renewed_on' => null,
			'notes' => null
		)
	)