Adding one object to the property of other objects by spread operator in node js giving unnecessary properties?

Question

My First Object is

conversation = {
  "members": [
    "613aa457e8d5f249922e7f86",
    "613aa457e8d5f249922e7faa"
  ],
  "_id": "613aace085dee060fdeb6a9c",
}

My Second object is

message = {
  "read": false,
  "_id": "613aadd58becf96394001efa",
  "sender": "613aa457e8d5f249922e7f86",
  "text": "hi",
  "conversation_id": "613aadcc8becf96394001ee8",
}

My Expected Result is

{
  "members": [
    "613aa457e8d5f249922e7f86",
    "613aa457e8d5f249922e7faa"
  ],
  "_id": "613aace085dee060fdeb6a9c",
  "message": {
    "read": false,
    "_id": "613aadd58becf96394001efa",
    "sender": "613aa457e8d5f249922e7f86",
    "text": "hi",
    "conversation_id": "613aadcc8becf96394001ee8",
  }
}

At First I tried with spread operator by following this link

let new_object= { ...conversation, messages }

and i got the result something like this

I also tried with these way by following stack-overflow

let new_object= Object.assign(conversation, message);

let new_object= Object.assign({},conversation, message);

But I don't get my expected result.

it looks like your converstation and message objects are completely different to what you say they are — Bravo
– Bravo, Commented Sep 10, 2021 at 3:25
There is no need to spread messages @JuanMendes. Because OP wants the message to be an individual object. — DecPK
– DecPK, Commented Sep 10, 2021 at 3:28
@HR01M8055 It works in this way, but i get this conversation and message object from database, and when i call that from API , i couldn't get what i want — Nurul Islam
– Nurul Islam, Commented Sep 10, 2021 at 3:36
let new_object= { ...conversation, messages } does work, but if you're working with data you're getting asynchronously you may have to await for all the data to be returned before you can merge them together. — Andy
– Andy, Commented Sep 10, 2021 at 3:46

Myk Willis · Accepted Answer · 2021-09-10 03:45:49Z

2

It looks like you might be loading your data from mongoose, which by default is going to decorate your objects such that they aren't the "plain old javascript objects" you think they are.

Mongoose provides a toObject method on Document that can convert an object you loaded from the DB to the plain object you're expecting. You probably want to do something like this:

  // assume conversationFromDb and messageFromDb are Mongoose documents
  const conversation = conversationFromDb.toObject();
  const message = messageFromDb.toObject();

  const newObject = { ...conversation, message };

answered Sep 10, 2021 at 3:45

Myk Willis

12.9k5 gold badges50 silver badges65 bronze badges

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

2 Comments

Nurul Islam Over a year ago

yes mate, i am loading all of these data from mongoDB database, i am going to try this way and let you know

Nurul Islam Over a year ago

thank you brother, i got my solution. But now i have done it implementing mongodb aggregation framework

Collectives™ on Stack Overflow

Adding one object to the property of other objects by spread operator in node js giving unnecessary properties?

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related