/**
  **显示一个事件详情,包括涉事儿童信息和当前节点简要信息.
  * @param $id
  * @return string
  * @throws HttpException
  */
 public function actionEvent($id)
 {
     /** @var LocationNew $location_new */
     $location_new = LocationNew::find()->where('event_id=:event_id and is_reliable=1', [':event_id' => $id])->with('provider')->orderBy('occur_at DESC')->one();
     /** @var Event $event */
     $event = Event::find()->where('id=:id', [':id' => $id])->with(['user', 'profiles'])->one();
     if (!$location_new || !$event) {
         throw new HttpException(404, 'The resource you request does not exist');
     }
     return $this->render('event', ['event' => $event, 'profile' => $event->profiles[0], 'location_new' => $location_new, 'provider' => $location_new->provider]);
 }