I get the CI_DB_mysqli_driver::row_array() in Codeigniter -

i ci_db_mysqli_driver::row_array() error when trying display cell value.

this model

function list_get($id){     $this->load->database();     $query = $this->db-> select('*')         ->from('lists')         ->join('list_items', 'list_items.items_list_id = lists.list_id')         ->where('items_list_id', $id);     return $query->row_array(); } 

the error appears when try echo view <?echo $query['list_by'];?>