안녕하세요

공부 삼아 생활코딩과, 책, 구글링으로  게시판을 만들고 있는데요 update문제로 속상하네요

function의 인수가 자꾸 부족하다고 뜨는데 어떻게 해야할지 잘 모르겠습니다 ㅠㅠ  

도움 부탁드리겠습니다  

<table 정보>

TABLE topic

id int(11) NOT NULL AUTO_INCREMENT,

title varchar(255) NOT NULL ,

description text NULL ,

created datetime NOT NULL ,

PRIMARY KEY (id)

<model>

function update($id, $data){
    $this->db->set('created', 'NOW()', false);
    $where=  $this->db->where('id', $id);
    return   $this->db->update('topic', $data);
}

<controller>

function update($id)

{
    if (!$this->session->userdata('is_login')) {
        $this->load->helper('url');
        redirect('/auth/login?returnURL=' . rawurldecode(site_url('/country/update')));
    }
    $this->load->view('pheader');
    $this->load->view('paside');
    $this->load->library('form_validation');
    $this->form_validation->set_rules('title', '제목', 'required');
    $this->form_validation->set_rules('description', '본문', 'required');
    if ($this->form_validation->run() == FALSE) {
        $this->load->view('update');
    } else {

        $data = array(
            'title' => $this->input->post('title'),
            'description' => $this->input->post('description')
        );
        $this->countries->update($id, $data);
        $this->load->model('user_model');
        $users = $this->user_model->gets();
        $this->load->helper('url');
        redirect('/country/example2/');
        $this->load->view('pfooter');
    }
}

<error>

An uncaught Exception was encountered

Type: ArgumentCountError

Message: Too few arguments to function Country::update(), 0 passed in C:\Apache24\htdocs\system\core\CodeIgniter.php on line 532 and exactly 1 expected

Filename: C:\Apache24\htdocs\application\controllers\country.php

Line Number: 122

Backtrace:

File: C:\Apache24\htdocs\index.phpLine: 315Function: require_once