node.js - Creating unique _id for Schemaless sub-documents?

Question

I'm declaring Schema-less type document. I was wondering if there's a way to create _id field later when I'm creating sub-documents for that schema-less document.

Here's an example. I want to create _id for each data that myArray will have in future.

Schema Creation:

// This will be used for MyModel

const mySchema = new mongoose.Schema({
   myArray: {
      type: Array
   }
})

What I'll do later:

const someData = [
   { a: '1', b: '2', c: '3' }
]

someArray.forEach( each => {
   MyModel.myArray.push( each );
});

Desired Outcome

myArray = [
   {
      _id: 'mongoose generated unique _id',
      a: '1'
   },
   {
      _id: 'mongoose generated unique _id',
      b: '2'
   },
   {
      _id: 'mongoose generated unique _id',
      c: '3'
   }
]

question from:https://stackoverflow.com/questions/65644351/creating-unique-id-for-schemaless-sub-documents

Answer 1

Waitting for answers