Solve Problem This Ruels Validator

	public function rules()
	{
		if(isset($_POST['ProfileViewModel']['username']))
		{
			$rulesArray[] = array('username', 'length', 'min' => 3, 'max' => 20, 'message' => 'Incorrect username (length between 3 and 20 characters).');
		}
		
		$rulesArray[] =	array('nickname', 'length', 'max'=>50);
		$rulesArray[] = array('gender', 'length', 'max'=>6);

		return $rulesArray;
	}