如何在nodejs中插入ref objectId？

Question

1. Main Model

 { name: { type: String, trim: true, required: true }, carModels: [{ type: ObjectId, ref: 'CarModel' }] }

2. Second Model

 { name: { type: String, trim: true, required: true }, carModels: [ { type: ObjectId, ref: 'CarModel' } ] },

3. Third Model

 { name: { type: String, trim: true, required: true } },

Here i am trying to insert the data like this

 { "name": "test", "phoneNumber": "0123456789", "email": "m@m.com", "carMakes": [{ "name": "BMW", "carModels": [{ "_id": "some id" }] }] }

and it giving me error like

carMakes.0: Cast to [ObjectId] failed for value

here is the create function

export const create = async data => {
  const result = await Booking(data).save();
  return result;
};

Can anyone tell what I am missing here..i am learning nodejs

Answer 1

i think the problem is with the _id that you're passing to carModel and since you set the type to ObjectId it has to be in a valid format "either 12 byte binary string, or a 24 hex byte string" and "some id" is not the valid one if you're sending that.

you can check if your id is valid with isValidObjectId() function.

or you can easily generate an ObjectId :

var mongoose = require('mongoose');
var id = new mongoose.Types.ObjectId();