Array
(
    [0] => Array
        (
            [AdoPosition] => Array
                (
                    [name] => Sahbaj
                )

        )

    [1] => Array
        (
            [AdoPosition] => Array
                (
                    [name] => test-name
                )

        )

)

$name = $this->AdoPosition->find('all',
     array(
       'fields'=>'AdoPosition.name',
       'group'=>'AdoPosition.name'
       ));
pr($name);

$name = $this->AdoPosition->find('list', array(
    'fields' => array('AdoPosition.name', 'AdoPosition.name'),
    'group' => array('AdoPosition.name')
));
$name = implode(',', $name);

"Sahbaj,test-name"

$data = $this->AdoPosition->query('SELECT GROUP_CONCAT(DISTINCT name) from your_table_name;');

$result = implode( ",", Set::classicExtract($name, '{n}.AdoPosition.name'));

echo $result; // Sahbaj,test-name

$names=Set::extract("/AdoPosition/name",$array);

$names = $this->AdoPosition->find('list', array('fields'=>array('name')));