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Javascript – FindByIdAndUpdate creates an _id inside a nested object

I’m developing an endpoint that accepts a basic invitation, I need to get a notification by an id provided in the parameters (suing express), and then update his result field. The interface/schema is like this:

const NotiticationSchema = new Schema<Notitication>({
    title: { type: String, required: true },
    description: { type: String, default: null },
    date: { type: Date, default: Date.now() },
    type: { type: String, required: true },
    navigation: {
        type: String,
        enum: NotificationNav,
        required: true
    },
    navigationId: {
        type: String,
        enum: NotificationIds,
        required: true
    },
    teamId: { type: String, required: true },
    result: {
        type: {
            accepted: { type: Boolean, required: true },
            motivation: { type: String, required: true }
        },
        default: null
    }
});

This is the code that I’m currently using:

const notification = await NotiticationModel.findByIdAndUpdate(req.params["id"]!, { $set: { result: { accepted: true, motivation: null } } });

The expected output should be:

{
  ...
  "result": {
    "accepted": true,
    "motivation": null
  }
}

What NotiticationModel.findByIdAndUpdate() does:

{
  ...
  "result": {
    "accepted": true,
    "motivation": null,
    "_id": {
      "$oid": "65b23b495a60bda2c6e67996"
    }
  }
}

I’ve never encountered this behaviour, anyone can help?

P.S. I’ve already asked AI, it didn’t give any useful advice.

Tags:

2

Answers


  1. 0

    For your case, you should use the updateOne in stead of the findByIdAndUpdate

    The findById I think replaces the entire document with new one.

    Example

    this.modal.updateOne({
  _id: params.id
}, {
    $set: {
       "result": {
          "accepted": true,
          "motivation": null
        }
    }
})
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  2. 0

    This is expected behaviour. When you add an object to MongoDB then mongoose will automatically assign an _id property of type ObjectId to it.

    To remove this feature pass the _id: false property into your schema for the relevant object like so:

    const NotiticationSchema = new Schema<Notitication>({
    //...
    teamId: { type: String, required: true },
    result: {
        type: {
            accepted: { type: Boolean, required: true },
            motivation: { type: String, required: true }
        },
        default: null,
        _id: false //< here
    }
});
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