从外部文件传递Multer中间件

Question

我是使用multer在node-express应用中上传文件的新手。我尝试在路由中传递中间件（从单独的文件导入），但在控制台中收到错误消息：

router.post('/', uploadMW.multerFunction('/articles').any('image'), articleController.article_create);
                          ^

TypeError: uploadMW.multerFunction is not a function
    at Object.<anonymous> (F:\wordify-web\backend-wordify\api\routes\articles.js:9:27)

这是我传递中间件的路由器文件代码：

const express = require('express');
const router = express.Router();

const articleController = require('../controllers/articles');
const uploadMW = require('../middleware/multer-file');

router.get('/', articleController.article_get_all);

router.post('/', uploadMW.multerFunction('/articles').any('image'), articleController.article_create);

router.get('/:articleId', articleController.article_by_id);
module.exports = router;

这是multer文件代码：

const express = require('express');
const router = express();
const multer = require('multer');


let storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, './uploads')
    },
    filename: function (req, file, cb) {
        cb(null, file.filename + '-' + Date.now() + path.extname(file.originalname))
    }
})

const upload = multer({storage: storage}).single("image");

module.exports = upload;

请帮助解决。