How to use setDefaultsOnInsert properly - mongodb

Question

Am trying to upsert an object with a query below:
await Property.findOneAndUpdate({ "property_id": property_id }, object,{ upsert: true, setDefaultsOnInsert: true })
My schema looks like below:
const mongoose = require('mongoose');
const propertySchema = new mongoose.Schema({
property_id: String,
details: {
location: {
type: {
type: String,
default: "Point"
},
coordinates: [Number],
address: String,
country: {
type: String,
default: 'USA'
},
state: {
type: String,
default: 'CA'
},
city: {
type: String,
default: 'N/A'
},
},
status: {
type: String,
enum: ['pending', 'active', 'deleted', 'suspended'],
default: 'pending'
},
}
},
{
strict: false
});
propertySchema.index({ "details.location.coordinates": "2dsphere" });
mongoose.model('Property', propertySchema);
module.exports = mongoose.model('Property');
Yet, when new objects are inserted, attributes and their default values are not inserted, what am doing wrong ?

Answer 1

There a big difference between MongooseDocument and Object:
on MongooseDocument you could apply any method, like $set or .save() it. So you could modify the DB value directly. (Or convert it to JSON/Object/String and lose this property)
when you are dealing with JSON or vanilla js Object you are modifying the object itself, not the DB value. So if you want to modify the DB document you should find it by object's key and update it.
When you are dealing with Model.method_name, especially with find(One)AndUpdate you should provide object type. NOT MongooseDocument or anything else. In that case you should convert DB doc toObject by this method.
Or, if you receiving DB value via any .find method, you receive MongooseDocument by default, and you should use lean() option right after your find query. If you need js-object for any findAndUpdate method later.
For example:
let mongoose_doc = await model.findByID(id) //returns mongoose doc
but
let js_object = await model.findByID(id).lean() //returns you js object