php - Issue about transaction in CodeIgniter -

i have 2 models: modela, modelb. want implement 2 operations related these models in ci's transaction in mycontroller. e.x:

$this->db->trans_start();  $this->modela->uodatea(conditions, item); $this->modelb->updateb(conditions, item); // conditions , item valid $this->db->trans_complete();  if ($this->db->trans_status() === false) { //handle when failed } 

here 2 operation in these models:

public function updatea($where = array(), $item = array(), $auth = null){         if(!is_array($item) && empty($item)) return false;          if(is_numeric($where)){             $where = array('vote_id'=>$where);         }         $this->db->where($where)->update($this->_table,$item);           return    ($this->db->affected_rows() > 0);     }   public function updateb($where = array(), $item = array(), $auth = null){         if(!is_array($item) && empty($item)) return false;              if(is_numeric($where)){                 $where = array('vote_id'=>$where);             }          $this->db->where($where)->update($this->_table,$item);         return ($this->db->affected_rows() > 0);     } 

although updateb() failed (ex: can't have record update, update int field string value...) trans_status() still return true. want when updateb() failed must rollback. how fix? much

you can try one

 $this->db->trans_begin();   $this->modela->inserta();  $this->modelb->updateb();   if ($this->db->trans_status() === false)  {     $this->db->trans_rollback();  }  else  {     $this->db->trans_commit();  }