codeigniter's pagination offset not working - codeigniter

Question

In CI's pagination, the data index should follow the offset. For example : if the limit is 10 then the 2nd index should have 10 offset, which means the index will start from 11 to 20.
I followed some tutorials, but i still cant get this offset thing works correctly. My index always reseted to 1 each time i click the differet pagination index.
This is my pagination code, note that i have tried to echo the $offset and the value is true (in 2nd index = 10, in 3rd index = 20, with $limit = 10) so i dont know why its not working:
public function index($offset = 0) {
//check authorization
if(!isset($_SESSION['username']))
redirect('backend_umat/login');
// the $offset value is true, but the index is still reseted to 1
echo $offset;
$limit = 10;
$result = $this->umat_m->get_umat($limit, $offset);
//pagination
$config['base_url'] = site_url('/backend_umat/index');
$config['total_rows'] = $result['num_rows'];
$config['per_page'] = $limit;
$config['uri_segment'] = 3;
$config['full_tag_open'] = '<div id="pagination">';
$config['full_tag_close'] = '</div>';
$this->pagination->initialize($config);
$data['pagination'] = $this->pagination->create_links();
And this is my model :
public function get_umat($limit, $offset) {
$this->db->select('*')->from('msumat')->limit($limit, $offset)->
join('mskelas', 'msumat.kelas_id = mskelas.kelas_id');
$q = $this->db->get();
$result['rows'] = $q->result();
$result['num_rows'] = $this->db->select('*')->from('msumat')->
join('mskelas', 'msumat.kelas_id = mskelas.kelas_id')
->get()->num_rows();
return $result;
Thanks for your help :D

Answer 1

public function index() {
//check authorization
if(!isset($_SESSION['username']))
redirect('backend_umat/login');
// the $offset value is true, but the index is still reseted to 1
//pagination
$config['base_url'] = base_url().'backend_umat/index';
// basically you need a separate query to return only numrows
$config['total_rows'] = ?;
$config['per_page'] = 10;
$config['uri_segment'] = 3;
$config['full_tag_open'] = '<div id="pagination">';
$config['full_tag_close'] = '</div>';
$this->pagination->initialize($config);
$offset = ($this->uri->segment(3)) ? $this->uri->segment(3) : 0;
$result = $this->umat_m->get_umat( $config['per_page'], $offset);
$data['pagination'] = $this->pagination->create_links();
Here try this, i changed some code hope this works. Basically i intitialized first the pagination config, before calling anything from the model. Just do a separate query to get the numrows.

Answer 2

Controller
site.com/<controller>/index/<page>
public function index($offset = 0) {
//check authorization
if(!isset($_SESSION['username']))
redirect('backend_umat/login');
$limit = 10;
$offset = (int) $offset;
$result = $this->umat_m->get_umat($limit, $offset);
//pagination
$config['base_url'] = site_url('/backend_umat/index');
$config['total_rows'] = $result['num_rows'];
$config['per_page'] = $limit;
$config['uri_segment'] = 3;
$config['full_tag_open'] = '<div id="pagination">';
$config['full_tag_close'] = '</div>';
$this->pagination->initialize($config);
$data['pagination'] = $this->pagination->create_links();
Model
public function get_umat($limit, $offset) {
$result['rows'] = $this->db
->select('SQL_CALC_FOUND_ROWS, msumat.*, mskelas.*', FALSE)
->limit($limit, $offset == 1 ? 0 : $offset)
->join('mskelas', 'msumat.kelas_id = mskelas.kelas_id')
->get('msumat')
->result();
$req = $this->db->query('SELECT FOUND_ROWS()')->row_array();
$result['num_rows'] = $req['FOUND_ROWS()'];
return $result;
}
To not have to rewrite a second sql req, you can use SQL_CALC_FOUND_ROWS to retrieve the total if the request did not contain a LIMIT statement. But this can be slower than two requests.
I used FALSE as second arguments in the select() in order that CI not tries to protect field or table names with backticks.
->select('*'): is useless if you want all fields, CI will do it by default if select method was not called.
->get()->num_rows(): use instead ->count_all_results([table]).

Answer 3

First, thanks to tomexsans and lighta for their help. Sorry, i made a "stupid" mistake - which took about 2-3 hours to realize -, the index is not following the $offset because i FORGET to use that variable. I use an integer that i reset to 1 everytime the page load, so the index will reset to 1 forever :P