Why cant I delete an item in an object using `delete`

Question

  static profile = async (req: Request, res: Response) => {
    try {
      const { username } = req.params;
      const account = await userModel
        .findOne({ 'shared.username': username })
        .exec();
      if (account) {
        delete account.shared.email; // <======= Why isnt this deleteing email
        console.log(account.shared);
        res
          .status(200)
          .send({ shared: account.shared, lastSeen: account.updatedAt });
      } else res.status(400).send({ message: 'Server Error' });
    } catch (error) {
      res.status(400).send({ message: 'Server Error', error });
    }
  };

console.log(account.shared) shows the below

{ language: 'en',
  loggedIn: true,
  warningMessage: 'verify',
  username: 'bill',
  email: 'bill@gmail.com',   // <===== Why is this still here?
  fullName: 'Bill',
  location: '/contact',
  gender: 'male',
  avatarId: '338fcdd84627317fa66aa6738346232781fd3c4b.jpg',
  country: 'US' }

if id do

console.log(account.shared.email); // undefined

I get undefined but if I console.log(response) on the front end the email is still in the object

I think this is the reason you are unable to delete it.https://stackoverflow.com/questions/23342558/why-cant-i-delete-a-mongoose-models-object-properties — KrishnaSingh, Dec 14 '19 at 15:12
It's because of the implementation of mongoose , you can also check delete usage in mozzila doc https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete — KrishnaSingh, Dec 14 '19 at 15:15

score 1 · Accepted Answer · answered Dec 14 '19 at 15:07

1

You can omit it using ES6 syntax like this

if (account) {
        const {email, ...otherFields} = account.shared;
        console.log(otherFields);
        res
          .status(200)
          .send({ shared: otherFields, lastSeen: account.updatedAt });
      } else res.status(400).send({ message: 'Server Error' });
    }

answered Dec 14 '19 at 15:07

Lazar Nikolic

4,261
1
22
46

this works great, can it be used to remove more than one key? – Bill Dec 14 '19 at 15:13
1

Yes. Anything you want to omit from your object you can deconstruct in such a way const {email, username, nalguage, otherFields} = acount.shared ... – Lazar Nikolic Dec 14 '19 at 15:17
Also, if my answer has solved your question could you mark it as solved? :) – Lazar Nikolic Dec 14 '19 at 15:17
So Is it like taking what you want from `account` like `email,name,etc...` and leaving rest? – Shivam Dec 14 '19 at 15:29

score 0 · Answer 2 · answered Dec 14 '19 at 15:14

0

You declared const account, might be that declaring account as a constant prevents the delete to alter the object. Try using var account instead.

answered Dec 14 '19 at 15:14

mottek

929
5
12

Good, call I did try a `let` and it still didn't delete – Bill Dec 14 '19 at 15:15

Why cant I delete an item in an object using `delete`

2 Answers2