Theobeliks @Theobeliks

Ошибка TypeError: registrationRules is not a function?

При очередном запуске проекта выдает ошибку:

TypeError: registrationRules is not a function
    at Object.<anonymous> (C:\Users\fenrir\Desktop\chat-app\chat-backend\router\auth.js:9:5)
    at Module._compile (node:internal/modules/cjs/loader:1083:30)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1112:10)
    at Module.load (node:internal/modules/cjs/loader:948:32)
    at Function.Module._load (node:internal/modules/cjs/loader:789:14)
    at Module.require (node:internal/modules/cjs/loader:972:19)
    at require (node:internal/modules/cjs/helpers:88:18)
    at Object.<anonymous> (C:\Users\fenrir\Desktop\chat-app\chat-backend\router\index.js:7:17)
    at Module._compile (node:internal/modules/cjs/loader:1083:30)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1112:10)
Program node index.js exited with code 1

auth.js:

const router = require('express').Router()
const { login, register } = require('../controllers/authController')
const { validate } = require('../validators')
const { rules : registrationRules } = require('../validators/auth/register')

router.post('/login', login)

router.post('/register', [
    registrationRules(),
    validate
], register)

module.exports = router

register.js:

const {body} = require('express-validator')

exports.rules = () => {
    return [
        body('firstName').notEmpty(),
        body('lastName').notEmpty(),
        body('gender').notEmpty(),
        body('email').isEmail(),
        body('password').isLength({ min: 5})
    ]
}

Если передавать промежуточную функцию registrationRules без скобок, то выдает другую ошибку:

Error: Route.post() requires a callback function but got a [object Undefined]
    at Route.<computed> [as post] (C:\Users\fenrir\Desktop\chat-app\chat-backend\node_modules\express\lib\router\route.js:211:15)
    at Function.proto.<computed> [as post] (C:\Users\fenrir\Desktop\chat-app\chat-backend\node_modules\express\lib\router\index.js:521:19)        
    at Object.<anonymous> (C:\Users\fenrir\Desktop\chat-app\chat-backend\router\auth.js:8:8)
    at Module._compile (node:internal/modules/cjs/loader:1083:30)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1112:10)
    at Module.load (node:internal/modules/cjs/loader:948:32)
    at Function.Module._load (node:internal/modules/cjs/loader:789:14)
    at Module.require (node:internal/modules/cjs/loader:972:19)
    at require (node:internal/modules/cjs/helpers:88:18)
    at Object.<anonymous> (C:\Users\fenrir\Desktop\chat-app\chat-backend\router\index.js:7:17)
Program node index.js exited with code 1