Print Variable Into JSON NodeJS

Question

I'm working to developed API with NodeJS. I got undefined value when I print the value.

Here's my code:

const modelMateris = require("../models/materi");

var Home = {
  getHome: (req, res, next) => {

    const materisAsync = new Promise((resolve, reject) => {
      modelMateris.find({},(err, res) => {
        if(err) reject(err);
        resolve(res);
      });
    });

    var a = materisAsync
      .then(res => console.log(res))
      .catch(res => console.log(err));

    res.send({code:1000, materis:a });
  }
}

module.exports = Home;

I just want to show the output of var A into RESTAPI. So how to print it in NodeJS?

Nayan Patel · Accepted Answer · 2019-08-20 06:38:56Z

1

materisAsync
    .then(res => {
        console.log(res)
        const a = res
        res.send({code:1000, materis: res});
    })
    .catch(res => console.log(err));

As you are using then block the promise resolved value will be coming in the then block and be assigned to a variable, you can use async await in place of then block, as shown below.

var Home = {
        getHome: async (req, res, next) => {
            try {
                const materisAsync = new Promise((resolve, reject) => {
                    modelMateris.find({}, (err, res) => {
                        if (err) reject(err);
                        resolve(res);
                    });
                });

                const a = await materisAsync
                const b = await secondApicall // like this you can call multiple api

                res.send({ code: 1000, materis: a});
            } catch(error) {
                console.log(error)
            }
        }
    }

edited Aug 20, 2019 at 6:38

answered Aug 20, 2019 at 5:52

Nayan Patel

1,7691 gold badge25 silver badges28 bronze badges

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

2 Comments

igineiz Over a year ago

actually i want to create multiple API coming from different db model. so i declare variable to handle it. btw ur code still not working cause i run it with postman

Nayan Patel Over a year ago

For calling multiple api you can use async await, i have edited the code, please find the same.

Collectives™ on Stack Overflow

Print Variable Into JSON NodeJS

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related