Using variable from controller in model

Hi all.

I am struggling passing a variable to my before save function in my User model.

Controller:
$this->User->read(null, $data['user_id']);
                $this->User->set(array(
                    'noslug' => 1,
                    'TEST' => 'sdfsd'
                ));
        $this->User->save();

Model:

if(empty($this->data[$this->alias]['noslug']) {
  // noslug empty, do somthing cool
} else {
  // noslug not empty, do something else
}


$this->data[$this->alias]['noslug'] = always empty/false

How can I read the "noslug" = 1 in my model?

Thanks for any help on this!
-Tom

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