store\controllers\PurchaseController::actionCount PHP Method

    public function actionCount($id)
    {
        Yii::$app->response->format = Response::FORMAT_JSON;
        $count = (int) Yii::$app->request->post('value', 1);
        $model = Purchase::findOne(['id' => $id, 'store_id' => Yii::$app->user->identity->store_id]);
        if (!$model || $count < 1 || $count > 500) {
            throw new BadRequestHttpException('参数错误。');
        }
        $model->count = $count;
        if ($model->save(false)) {
            return ['status' => 'ok'];
        } else {
            return ['status' => 'no', 'msg' => '设置错误。'];
        }
    }