Fetching and updating data from a database - codeigniter-2

Question

I want to fetch and update data from database using codeigniter. I am facing some problem. This is my code:
This is my Model by the name of Update_site_model.
<?php
class update_site_model extends CI_Model{
function show_invoice_id($data) {
$this->db->select('*');
$this->db->from('invoices');
$this->where('invoiceId', $data);
$query = $this->db->get();
$result = $query->result();
return $result;
//Update Query For Selected Invoice.
function update($id,$data) {
$this->db->where('invoiceId',$id);
$this->db->update('invoices',$data);
}
}
?>
This is my Controller by the name of update site.
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Update_site extends CI_Controller {
public function __construct() {
parent::__construct();
$this->load->view('includes/header');
$this->load->view('site/update');
$this->load->view('includes/footer');
//load the model
$this->load->model('update_site_model');
}
function show_invoices() {
$id = $this->uri->segment(3);
$data['single_invoice'] = $this->update_site_model->show_invoice_id($id);
$this->load->view('site/update', $data);
}
function update() {
$id = $this->input->post('invoiceId');
$data = array(
'Date' => $this->input->post('invoiceDate'),
'Client' => $this->input->post('invoiceClient'),
'Amount' => $this->input->post('invoiceAmount'),
'Status' => $this->input->post('invoivceStatus')
);
$this->update_site_model->update($id, $data);
}
}
This is my view by the name of update. it is inside a folder by the name of site.
<div id="content">
<ol>
<?php foreach ($invoices as $invoice): ?>
<li><?php echo $invoice->invoiceId; ?></li>
</ol>
<?php endforeach; ?>
</div>
and this is the problem.
Severity: Notice
Message: Undefined variable: invoices
Filename: site/update.php
Line Number: 11
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: site/update.php
Line Number: 11
Please help me to solve the problem.

Answer 1

Look at this in your controller:
$data['single_invoice'] = $this->update_site_model->show_invoice_id($id);
and now look at this in your view:
<?php foreach ($invoices as $invoice): ?>
did you got your mistake..?
no..?
let me tell you , since you are storing the database result in $data['single_invoice'] you should access this by $single_invoice in the view.
so correct usage in your view is :
<?php foreach ($single_invoice as $invoice): ?>
and next time when you ask any question give appropriate title to it.