Submit a model in Mongoose that contains an array with ObjectID's - node.js

Question

I have an object called company that inside I have name(String) and locations(Array)
Inside locations I want to have a key called name that the user will generate, and second key generated by using ObjectID.
Unfortunately I can't get this to work as expected.
Example from Postman. Note that the locations didn't get _id.
What is going wrong?
My model
const mongoose = require('mongoose')
const companySchema = mongoose.Schema({
_id: mongoose.Schema.Types.ObjectId,
name: String,
locations: [
{
_id: mongoose.Schema.Types.ObjectId,
name: String
}
]
})
module.exports = mongoose.model('Company', companySchema)
My controller
createCompany: (req, res) => {
const { name, locations } = req.body
const company = new Company({
_id: new mongoose.Types.ObjectId(),
name: name,
locations: locations
})
company
.save()
.then(() => {
res.status(200).json({
company
})
})
.catch(error => {
res.status(500).json({
error
})
})
},

Answer 1

Mongoose will create _id for the top level and nested array of documents itself, which is a default behaviour.
So defining schema with only the fields that you want should be it.
const companySchema = new mongoose.Schema({
name: String,
locations: [
{
name: String
}
]
});
module.exports = mongoose.model("Company", companySchema);
OR
const locationSchema = new mongoose.Schema({
name: String
});
const companySchema = new mongoose.Schema({
name: String,
locations: [locationSchema]
});
module.exports = mongoose.model("Company", companySchema);
And subsequently you don't need to create the _id from the Model object as well.
const company = new Company({
name: name,
locations: locations
});
company
.save()
.then(() => {})
.catch(e => {});