Best method for sending form variables to a model ?

[eluser]BobbyB[/eluser]
Hi folks,
I am trying to pass variables to a model, and tried the above solutions.
But I must be doing sth wrong.

In my controller I got:

Code:

class Freebies extends Controller {

    function Freebies()
    {
        parent::Controller();
        $this->load->helper(array('form', 'url'));
    }
    
    function index()
    {

$this->load->model('Get_freebies');

$cat = $this->input->get_post('category', TRUE);

$this->model->add($cat);

$data['freebies'] = $this->Get_freebies->getselect();

$this->load->view('freebies_view', $data);
}
}

It says "Fatal error: Call to a member function on a non-object..."
I am trying to pass a "post" variable from a form to the controller and finally to the model.

Can I pass variables to only a single function(getselect() in a model or will they be passed to all the functions in the model?

Thaks in advance!