common\models\Purchase::hasGoods PHP Méthode

    public static function hasGoods($id)
    {
        return static::find()->where(['goods_id' => $id])->exists();
    }

 public function actionAdd($id)
 {
     Yii::$app->response->format = Response::FORMAT_JSON;
     if (!Goods::find()->where(['id' => $id, 'store_id' => Yii::$app->user->identity->store_id, 'status' => [Goods::STATUS_NORMAL, Goods::STATUS_OFF_SHELVES]])->exists() || Purchase::hasGoods($id)) {
         throw new BadRequestHttpException('拒绝操作。');
     }
     $model = new Purchase();
     $model->goods_id = $id;
     $model->store_id = Yii::$app->user->identity->store_id;
     $model->count = 1;
     if ($model->save(false)) {
         return ['status' => 'success', 'data' => []];
     } else {
         return ['status' => 'fail', 'data' => ['message' => '加入失败。']];
     }
 }