public function actionUpdate($id)
 {
     $model = Rel_read::find()->where("id = {$id}")->one();
     // 查询阅读关联文章,纪录片,主人公
     if ($post = Yii::$app->request->post()) {
         $model->set_read_rel($post);
         // 查询阅读关联文章,纪录片,主人公
         $xman = Xman::getOneById($model->xman_id);
         $film = Film::getOneById($model->film_id);
         $article = Article::getOneById($model->article_id);
         if ($model->save(false)) {
             return $this->render('update', ['msg' => '更新相关阅读成功!', 'model' => $model, 'xman' => $xman, 'film' => $film, 'article' => $article]);
         } else {
             return $this->render('update', ['msg' => '更新相关阅读失败,请刷新重试!', 'model' => $model, 'xman' => $xman, 'film' => $film, 'article' => $article]);
         }
     } else {
         $xman = Xman::getOneById($model->xman_id);
         $film = Film::getOneById($model->film_id);
         $article = Article::getOneById($model->article_id);
         return $this->render('update', ['model' => $model, 'xman' => $xman, 'film' => $film, 'article' => $article]);
     }
 }