Codeigniter - missing argument 1 - php

Question

I am having problems with my college assignments. I'm learning to make a update function trough codeigniter, then I got an error :
Missing argument 1 for Account::update()
When I press "Submit" button.
Controller :
class Account extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->model('cpanel/account/account_model');
}
public function update($nim) {
$this->form_validation->set_rules('nim', 'nim', 'required');
$this->form_validation->set_rules('nama', 'nama', 'required');
$this->form_validation->set_rules('sandi', 'sandi', 'required');
$this->form_validation->set_rules('email', 'email', 'required');
$this->form_validation->set_rules('telp', 'telp', 'required');
if ($this->form_validation->run() === FALSE) {
$data['akun'] = $this->account_model->detail();
$data['detail'] = $this->account_model->detail($nim);
$data = array('title'=> 'Mengubah Data Akun : '.$data['detail']['ortu_nama'], 'akun'=> $this->account_model->detail(), 'detail'=> $this->account_model->detail($nim), 'isi'=>'cpanel/account/account_edit_view');
$this->load->view('cpanel/layout/wrapper',$data);
} else {
$data = array(
'ortu_nim_mhs' => $this->input->post('nim'),
'ortu_nama' => $this->input->post('nama'),
'ortu_email' => $this->input->post('email'),
'ortu_telp' => $this->input->post('telp')
);
$this->account_model->update($data);
$konten = array('title'=>'Perubahan Data Sukses', 'isi'=>'cpanel/account/success_view');
$this->load->view('cpanel/layout/wrapper', $konten);
}
}}
Model :
class Account_model extends CI_Model {
public function __construct() {
$this->load->database();
}
public function update($data) {
$this->db->where('ortu_nim_mhs', $data['ortu_nim_mhs']);
return $this->db->update('user_ortu', $data);
}
public function detail($nim = FALSE) {
if ($nim === FALSE) {
$query = $this->db->get('user_ortu');
return $query->result_array();
}
$query = $this->db->get_where('user_ortu', array('ortu_nim_mhs'=>$nim));
return $query->row_array();
}}

Answer 1

Try $data = array(); in model function
public function update($data = array()) {
$this->db->where('ortu_nim_mhs', $data['ortu_nim_mhs']);
return $this->db->update('user_ortu', $data);
}

Answer 2

In your above code if you are submitting form with POST method than function argument is not required. Please check below.
public function update() {
// Your code
}
But in case if you submitting form with get method than you need to set data for validation first, like given below.
public function update() {
$this->form_validation->set_data($this->input->get());
$this->form_validation->set_rules('nim', 'nim', 'required');
$this->form_validation->set_rules('nama', 'nama', 'required');
$this->form_validation->set_rules('sandi', 'sandi', 'required');
$this->form_validation->set_rules('email', 'email', 'required');
$this->form_validation->set_rules('telp', 'telp', 'required');
// Your other code
}
This will help you. Let me know if it not works.