Method chainning for join table with pagination on CI 3 - mysql

Question

I create a core class named MY_Model that extends CI_Model. In this class, I create a method chaining to get all record with pagination like this :
// Take record with paging.
public function get_all_paged()
{
// get argument that passed
$args = func_get_args();
// get_all_paged($offset)
if (count($args) < 2) {
$this->get_real_offset($args[0]);
$this->db->limit($this->_per_page, $this->_offset);
}
// get_all_paged(array('status' => '1'), $offset)
else {
$this->get_real_offset($args[1]);
$this->db->where($args[0])->limit($this->_per_page, $this->_offset);
}
// return all record
return $this->db->get($this->_tabel)->result();
}
So , I just used like this on my controller,
for example
public function index($offset = NULL) {
$karyawan = $this->karyawan->get_all_paged($offset); //get all
}
I am realy confuse to get all record using join, I know join in CI like this :
public function get_all_karyawan() {
$this->db->select('tb_1 , tb_2');
$this->db->from('tb_1');
$this->db->join('tb_2', "where");
$query = $this->db->get();
return $query->result();
}
How to make it into chain in MY_Model?
Any help it so appreciated ...

Answer 1

The good thing in query builder, you can chain your db methods, till get(). So you can define, selects, where queries, limits in different ways.
For example:
public function category($category)
{
$this->db->where('category_id', $category);
return $this;
}
public function get_posts()
{
return $this->db->get('posts')->result();
}
And you can get all posts:
$this->model->get_posts();
Or by category:
$this->model->category(2)->get_posts();
So upon this, in your model:
public function get_all_karyawan() {
$this->db->select('tb_1 , tb_2');
$this->db->join('tb_1', "where");
// Here you make able to chain the method with this
return $this;
}
In your controller:
public function index($offset = NULL) {
$karyawan = $this->karyawan->get_all_karyawan()->get_all_paged($offset);
}