Node JS - How to return response from nested function?

Question

Is it possible to return a response when call a function within another function?

I have following codes -

// Add Category
exports.saveCategory = async function(catData, callback){

    try{
        const images = await uploadImages(catData.files);
        console.log(images); //nothing prints here
        const save = await function(catData,images){
            console.log('catdata');
            return callback({status:200,message:'test'});
        }
    } catch (e) {
        console.log(e);
    }
}

function uploadImages(images) {
    //some stuff
    return images;
}

Expected output : I want to return name of uploaded images from uploadImages function and pass it to another function to save in database.

Shubham Dixit · Accepted Answer · 2019-05-01 12:46:26Z

4

Only async function returns promise.Make your uploadImages function async

async function uploadImages(images) {
        //some stuff
        return images;
    }

answered May 1, 2019 at 12:46

Shubham Dixit

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Comments

Kai Lehmann · Accepted Answer · 2019-05-01 14:00:18Z

0

The solution of Shubh Dixit works fine but i have to correct, that async functions do NOT return a real Promise but async function object. These do not have a .catch() or .finally() method. He is right, that a return inside a async function object will return a Promise.resolve()

async function x() {
    return 2;
}
let value = await x();

returns a solved Promise with the value 2. Then the await returns the value of the resolved Promise to value. But if you try

let value = await x().catch((error)=> {console.log(error);});

you will recieve an error that .catch() is no method of x.

answered May 1, 2019 at 14:00

Kai Lehmann

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