Help with adding a jquery alert box after form is correctly submitted

[eluser]LuckyFella73[/eluser]
I have never seen this usage in models and can't find it in the user guide either:

Code:

$this->db->set('user_name',set_value('user_name')); // set_value

Maybe it should work .. don't know

Try the following code and see what you get. Note that you'll have
to edit the lines around "$db_data = array(" according to the name
attributes of your input fields!

Code:

# controller:
function save_user()
{
    $this->load->library('form_validation');

    // this load form validation on cofig folder
    if($this->form_validation->run('add_user') == FALSE)
    {
        $array = '{ "message" : "Input not valid" }';
        echo $array;
    }
    else
    {
        $this->load->model('User_model');
        
        $db_data = array(
            'username' => $this->input-post('username'),
            'password' => $this->input-post('username')// and so on
        );

        $add_data = $this->User_model->add_user($db_data);

        if($add_data === FALSE)
        {
            $array = '{ "message" : "Saving Failed" }';
            echo $array;
        }
        else
        {
            $array = '{ "message" : "Saving data success" }';
            echo $array;
        }
    }
    $this->load->view('add_user');
}

Code:

# model:
function add_user($data)
{
    if ( $this->db->insert('users', $data) )
    {
        return $this->db->insert_id();
    }
    else
    {
        return FALSE;
    }
}