public function actionCreate() { if ($carousel = Yii::$app->request->post()) { $model = new Carousel(); $files = Fileupload::upload(); $carousel['img'] = isset($files[0]) ? $files[0] : './img/default.jpg'; $model->set_carousel_data($carousel); if ($model->save(false)) { return $this->render('create', ['msg' => '添加轮播图成功!']); } else { return $this->render('create', ['msg' => '添加轮播图失败,请刷新重试!']); } } else { return $this->render('create'); } }