public function get_delivery_post()
 {
     $deliveries_repo = new Deliveries_Repository($this->base_model->get_db_instance());
     $delivery = $deliveries_repo->get_delivery($this->input->post('deliveryId'));
     $data = array();
     array_push($data, array('id' => $delivery->id, 'branch_id' => $delivery->branch_id, 'created_at' => $delivery->created_at, 'updated_at' => $delivery->updated_at));
     echo json_encode($data);
 }