Problem using function in exported custom module in nodejs

Question

I am new to nodejs and I am trying to export my custom module but it says function is not defined or is not a function.

I have created a module which contains a function to validate the request body using Joi library. Below is what I have done

validator.js

const Joi = require('joi');

var validateCustomer = function(customer) {
    const schema = {
        name: Joi.string().min(3).required()
    }

    return Joi.validate(customer, schema)
}

module.exports.validator = validateCustomer;

customers.js

const validator = require('../myModules/validator');

router.post('/', async (req, res) => {
    const {error} = validator(req.body);
    if(error) return res.error(404).send(error.details[0].message);
    ...some code 
});

Please help

jsarbour · Accepted Answer · 2019-05-29 19:23:11Z

3

Change out

module.exports.validator = validateCustomer;

for

module.exports = validateCustomer

in validator.js.

answered May 29, 2019 at 19:23

jsarbour

1,1981 gold badge10 silver badges21 bronze badges

Sign up to request clarification or add additional context in comments.

9 Comments

girish Over a year ago

Thanks.. it works.. but can you explain why i cannot use module.exports.validator = validateCustomer ?

jsarbour Over a year ago

Well let's think about what that's trying to say. module.exports.validateCustomer is looking for the module object's exports property's validateCustomer property. I don't believe that exists in any fashion. As such, you're setting a value that doesn't exist. I reccomend reading up on module.exports(), there's a relatively large number of well written guides, all easy to find.

girish Over a year ago

Please check my updated comment. I try to set validator = validateCustomer which is my function

jsarbour Over a year ago

You're just trying to declare to the larger JS enviroment "this module has a function called this and you're allowed to use it!" There's no need to associate it with anything.

jsarbour Over a year ago

As well, module in this case represents the "idea" of validator.js, which has some exports, specifically the validateCustomer function. It doesn't make sense to say validator.exports.validator = foo()

|

Collectives™ on Stack Overflow

Problem using function in exported custom module in nodejs

1 Answer 1

9 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

9 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related