CakePHP select field does not populate

CakePHP select field does not populate

I'm Using cakePHP 2.3.8
I have two tables: application, computer_application. The relationship is
one application hasMany computer_application, foreign key is
application_id
in my ComputerApplication model:
class ComputerApplication extends AppModel{
public $name = "ComputerApplication";
public $useTable = "computer_application";
var $belongsTo = array(
'Computer' => array(
'className' => 'Computer',
'foreignKey' => 'computer_id',
'dependent' => true
),
'Application' => array(
'className' => 'Application',
'foreignKey' => 'application_id',
'dependent' => true
)
);
}
In my ComputerApplication controller. HERE I INITIALIZE THE POPULATION OF
DROPDOWN in **add** function
public function add($id=null) {
if (!$id) {
throw new NotFoundException(__('Invalid post'));
}
$this->set('computerApplications',
$this->ComputerApplication->Application->find('list',
array('fields' => array('description') ) ) );
}
Now In my Add View
echo $this->Form->create("computerApplication");
echo $this->Form->input('application_id',array('empty'=>''));
echo $this->Form->end('Save Post');
My problem is that it won't populate the select input. This is the first
time I used 2 words in table [computer_application] using cake since I
don't have problem populating other table with just one word. Just help me
identify which I need to tweak for it to populate.