[BUG] cannot update nested keys inside discrimator

[gilles-yvetot]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
One of my keys is not updated while the other one is. It looks like Mongoose stripped away the prop while calling Mongo

If the current behavior is a bug, please provide the steps to reproduce.

const StepSchema = new Schema({ url: String }, { discriminatorKey: `type` })

    const SheetReadOptionsSchema = new Schema({
      location: {
        id: String,
        timeout: Number,
      },
    })

    const ClickSchema = new Schema(
      [StepSchema, { sheetOptions: SheetReadOptionsSchema }],
      { discriminatorKey: `type` },
    )

    const Step = model(`Step`, StepSchema)

    Step.discriminator(`click`, ClickSchema)

    let doc = await Step.create({
      type: `click`,
      url: `https://google.com`,
      sheetOptions: {
        location: {
          id: `currentCell`,
          timeout: 1000,
        },
      },
    })

    doc.set({
      'sheetOptions.location.id': `inColumn`,
      'sheetOptions.location.timeout': 2000,
    })
    await doc.save()

    const updatedDoc = await Step.findOne({ type: `click`, _id: doc._id })
    console.log(updatedDoc.sheetOptions.location.id) // `currentCell` instead of `inColumn`
    console.log(updatedDoc.sheetOptions.location.timeout) // 2000 correct

What is the expected behavior?
updatedDoc.sheetOptions.location.id should display inColumn

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.

mongoose 6.2.1
node 16.14.0
mongo 5

[gilles-yvetot]

another data point: if SheetReadOptionsSchema keys are flatten out, i.e location is removed, id and timeout are added to the root, it works fine. It looks like it is because it is nested

[IslandRhythms]

const mongoose = require('mongoose');
const {Schema, model} = mongoose;

const StepSchema = new Schema({ url: String }, { discriminatorKey: `type` })

    const SheetReadOptionsSchema = new Schema({
      location: {
        id: String,
        timeout: Number,
      },
    })

    const ClickSchema = new Schema(
      [StepSchema, { sheetOptions: SheetReadOptionsSchema }],
      { discriminatorKey: `type` },
    )

    const Step = model(`Step`, StepSchema)

    Step.discriminator(`click`, ClickSchema)

    async function run() {
        await mongoose.connect('mongodb://localhost:27017')
        await mongoose.connection.dropDatabase();
        let doc = await Step.create({
            type: `click`,
            url: `https://google.com`,
            sheetOptions: {
              location: {
                id: `currentCell`,
                timeout: 1000,
              },
            },
          })
      
          doc.set({
            'sheetOptions.location.id': `inColumn`,
            'sheetOptions.location.timeout': 2000,
          })
          console.log('the doc', doc)
          await doc.save()
      
          const updatedDoc = await Step.findOne({ type: `click`, _id: doc._id })
          console.log(updatedDoc.sheetOptions.location.id) // `currentCell` instead of `inColumn`
          console.log(updatedDoc.sheetOptions.location.timeout) // 2000 correct
    }

    run();

[gilles-yvetot]

thanks @vkarpov15 and @IslandRhythms