public function get_all_items_from_this_delivery_post()
 {
     $deliveries_repo = new Deliveries_Repository($this->base_model->get_db_instance());
     $delivered_items = $deliveries_repo->get_all_items_from_delivery($this->input->post('deliveryId'));
     $data = array();
     foreach ($delivered_items as $delivered_item) {
         $items_repo = new Items_Repository($this->base_model->get_db_instance());
         $item = $items_repo->get_item($delivered_item->item_id);
         array_push($data, array('id' => $delivered_item->id, 'item_id' => $delivered_item->item_id, 'description' => $item->description, 'quantity' => $delivered_item->quantity, 'price' => $delivered_item->price));
     }
     echo json_encode($data);
 }