TypeError: expecting an array or an iterable object but got [object Null]

[adoyle-h]

Please answer the questions the best you can:

1. What version of bluebird is the issue happening on? 3.7.2

2. What platform and version? (For example Node.js 0.12 or Google Chrome 32) NodeJS v12.13.1

3. Did this issue happen with earlier version of bluebird? I am not sure.

(Write description of your issue here, stack traces from errors and code that reproduces the issue are helpful)

An error TypeError: expecting an array or an iterable object but got [object Null] is thrown by below code.

'use strict';

const Promise = require('bluebird');

const doSomething = () => {};

async function main() {
    await Promise.map({}, doSomething);
}

main().catch((err) => {
    console.error(err.stack);
});

I think Promise.map should not throw error and doSomething function is not invoked when the iterable input is an empty object.

[adoyle-h]

Sorry, its my fault.

[jsponz]

@adoyle-h what was the issue? I am having the same error!

Thanks in advance.

[adoyle-h]

@jsponz Because the first argument only accepts Iterable object. The array is iterable, but the {} is not.

Read the documents. http://bluebirdjs.com/docs/api/promise.map.html

You should use Promise.props and other apis.