How to get return value from Mongoose save function using axios in React JS?

Question

I am new to React JS and I created a simple application which accept UserName and Email and inserts to MongoDB.

I use React + Node + Express + Mongoose + MongoDB and I was able to insert the record successfully

DB.js

router.route("/insert").post(function(req, res) {

  let comments = new Comments(req.body);
  console.log(req.body)
  comments.save();
});

App.js

axios.post("http://localhost:4000/insert", {
            UserName:  username,
            UserEmail: email,
            Comments:  comments
        })

Now, I want to return 'numRowsAffected' from DB.js to App.js.

Hence, I modified DB.js by adding callback to mongoose save() function

router.route("/insert").post(function(req, res) {
  let comments = new Comments(req.body);
  console.log(req.body)
  comments.save(function(err, comments, numRows) {
      if ( err ) { 
          res.send(err);
      }
      else {
          res.json({ message: 'Comments added', data: numRows });
      }
  });
});

However, I don't know how to change the code on App.js (ie in axios.post) to fetch the return value from DB.js

Any help is highly appreciated

Answer 1

You can use Mongoose.update() with upsert option set to true instead of Mongoose.save() and read the nModified and nInserted property of update return value.

You can see this post for more detail.