Check if a key in array of objects in Javascript?

Question

I try to check if a value is in array's objects. After that I push the object is the value is not in the array. How can I do this ?

router.post('/save', (req, res) => {
let userId = req.user.id
let dataPushSave = req.body.idSave
let dataPushSaveObj = {idSave: dataPushSave}

User.findById(userId, (err, user) => {
    if (user.favorites.idSave !== dataPushSave) {
        user.favorites.push(dataPushSaveObj)
        user.save()
    }
})

My mongoose model:

    const User = new Schema({
    firstName: {
        type: String,
        required: true
    },
    favorites: [{
        _id: Object,
        idSave: String
    }]
});

like this?

Stutje
– Stutje

2020-07-29 12:21:02 +00:00
Commented Jul 29, 2020 at 12:21 — Stutje
– Stutje, Commented Jul 29, 2020 at 12:21

varun249 · Accepted Answer · 2020-08-05 06:32:27Z

1

    const User = new Schema({
    firstName: {
        type: String,
        required: true
    },
    favorites: [{
        _id: Object,
        idSave: String
    }]
});

From the above schema, remove _id: Object from favorites. I would recommend below schema

const User = new Schema({
    firstName: {
        type: String,
        required: true
    },
    favorites: {
        type: [new Schema({
        idSave: { type: String },
      }, { _id: false })]
    }
});

Then use $addToSet operator to make sure there are no duplicates in the favorites array.

let user;
User.findByIdAndUpdate(
  userId, 
  { $addToSet: {  favorites: dataPushSaveObj } }, 
  { new: true }, // this option will make sure you get the new updated docc
  (err, doc) => {
    if (err) console.error(err);
    user = doc;
  }
);

edited Aug 5, 2020 at 6:32

answered Jul 29, 2020 at 15:35

varun249

1,4462 gold badges11 silver badges10 bronze badges

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

1 Comment

lf_celine Over a year ago

I have a Tried to set nested object field favorites` to array [object Object] and strict mode is set to throw.` with your solution

Collectives™ on Stack Overflow

Check if a key in array of objects in Javascript?

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related