Codeigniter confusing with $this->db queries - codeigniter

Question

I'm trying to access data by using another model's method in my model but it gives me error because it confuses by previous $this->db parameters:
$this->db->select('*');
$this->db->group_start();
$this->db->like('title',$keyword);
$this->db->or_like('keyword',$keyword);
$this->db->group_end();
$locations = $this->place_model->search_ids_by_name($location);
and the search_ids_by_name() of Place_model is like this:
public function search_ids_by_name($q) {
$this->db->select('id');
$this->db->like('name',$q);
$qry = $this->db->get('places');
$results = $qry->result_array();
$place_ids = array();
foreach ($results as $result) {
array_push($place_ids, $result['id']);
}
return $place_ids;
}
But it gives me below error
Error Number: 1054, Unknown column 'category' in 'where clause'
Filename: models/Place_model.php
It seems in my place_model function also using like and or_like methods. How can I seperate them.

Answer 1

I found a solution. I made another connection:
public function search_ids_by_name($q) {
$places_db = $this->load->database('default', TRUE);
$places_db->select('id');
$places_db->like('name',$q);
$qry = $places_db->get('places');
$results = $qry->result_array();
$place_ids = array();
foreach ($results as $result) {
array_push($place_ids, $result['id']);
}
return $place_ids;
}