immutable with upsert in nested object

[josephstgh]

Hi,

I'm trying to use upsert and immutable feature and it doesn't seem to work in nested object. Is it supposed to work this way or am I doing it wrong?

const mongoose = require('mongoose');

mongoose.set('useFindAndModify', false);

const { Schema } = mongoose;

run().catch(err => console.log(err));

async function run() {
  await mongoose.connect('mongodb://localhost:27017/upsert_immutable', {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  });

  await mongoose.connection.dropDatabase();

  const aInfo = {
    a: String,
    b: String,
    c: String
  }

  const schema = new Schema({
    name: String,
    description: String,
    xInfo: {
        type: aInfo,
        immutable: true,
        required: true,
    },
    yInfo: {
      type: String,
      required: true,
    },
    zInfo: {
      type: String,
      immutable: true,
      required: true,
  },
  })

  const newDoc = {
      name: 'name',
      description: 'new desc',
      xInfo: { a: 'a', b: 'b', c: 'c' },
      yInfo: 'yInfo',
      zInfo: 'zInfo'
  }

  const Model = mongoose.model('Test', schema);
  await Model.findOneAndUpdate({ name: 'name' }, newDoc, { upsert: true });

  console.log('Done', await Model.findOne(), new Date());
}

The result is

// notice that xInfo is not created but zInfo is
{
  _id: 5fabaad551adf51882270695,
  name: 'name',
  __v: 0,
  description: 'new desc',
  yInfo: 'yInfo',
  zInfo: 'zInfo'
}

node: v12.18.4
mongoose: 5.10.10
mongodb: 4.2.0

Any idea? Thanks!

[vkarpov15]

This is a bug in Mongoose, thanks for reporting. Fix will be in v5.10.14.