Updating records codeigniter

Question

I am trying to update a table where id of the row is entered and title is selected through a dropdown list, but I have two problems. Firstly Im not sure how to pass the data to the model, and the second problem is actually updating the table using active record.

controller class

class Update extends CI_Controller {

public function __construct()
{
        parent::__construct();
        //$this->load->model('addmodel');
        //$this->load->helper('form');
}

public function index()
{
    $this->load->view('updview');

}

public function updtitle() 
{   

    $data = array(
    'id' => $this->input->post('id'),
    'title' => $this->input->post('title') );
    //$data1['data'] = $data;

    $data1['data'] = $this->updmodel->upddata($data);
    $this->load->view('updview', $data1);
}
}

?>

model class

class Updmodel extends CI_Model {
// model constructor function
function __construct() {
    parent::__construct(); // call parent constructor
    $this->load->database();
}

public function upddata($data) {

    $this->db->where('emp_no', $data['id']);
    $this->db->update('title', $data['title']);

    return;
}
}

?>

view

Update employee title

<form action="http://localhost/ecwm604/index.php/update/updtitle" method="POST">
    employee id: 
        <input type=text name="id"><br />
    change title to: 
        <select name="title">
            <option value="Assistant Engineer">Assistant Engineer</option>
            <option value="Engineer">Engineer</option>
            <option value="Senior Engineer">Senior Engineer</option>
            <option value="Senior Staff">Senior Staff</option>
            <option value="Staff">Staff</option> 
        </select><br />
    <input type="submit" value="submit"/>
    <br />
<?php
    print_r($data);
    //echo $data['title'];
?>

</body>
</html>

Answer 1

In your Controller

public function updtitle() 
{   
    $data = array(
        'table_name' => 'your_table_name_to_update', // pass the real table name
        'id' => $this->input->post('id'),
        'title' => $this->input->post('title')
    );

    $this->load->model('Updmodel'); // load the model first
    if($this->Updmodel->upddata($data)) // call the method from the model
    {
        // update successful
    }
    else
    {
        // update not successful
    }

}

In Your Model

public function upddata($data) {
    extract($data);
    $this->db->where('emp_no', $id);
    $this->db->update($table_name, array('title' => $title));
    return true;
}

The active record query is similar to

"update $table_name set title='$title' where emp_no=$id"