Cannot Query sub sub documents - node.js

Question

I can't access sub sub documents I want to query the sub documents implement back end pagination so that I can render them in a separate page
I've tried using dot notation something.something.something and even using this ["something"]["something"]["something"] arrays since I recently found out objects are kind of arrays
This is the model Schema || the child Schema
const modelSchema = new mongoose.Schema({
modelname: {
type: String,
required: true,
minlength: 5,
maxlength: 250
}
});
This is the Bikes Schema || parent Schema
const bikeSchema = new mongoose.Schema({
make: {
type: makeSchema,
required: true
}
})
This is how data is stored in Mongodb
"_id" : ObjectId("5d5e13e8edcbbf038c1f9b8e"),
"make" : {
"_id" : ObjectId("5d40f0b40268d80ac8c30973"),
"makename" : "{ _id: 5d40f0b40268d80ac8c30973, makename: 'ducatii', __v: 0 }"
}
The expected output according to the documentation in order to query the makename ducatii is to do something like this
console.log(bikes[0]["make"]["makename"]["makename"])
or this
console.log(bikes[0].make.makename.makename)

Answer 1

To embedded document into a document you have to do this like the below
var childSchema = new Schema({ name: 'string' });
var parentSchema = new Schema({
// Array of subdocuments
children: [childSchema],
// Single nested subdocuments. Caveat: single nested subdocs only work
// in mongoose >= 4.2.0
child: childSchema
});
Your case
const modelSchema = new mongoose.Schema({
makename: {
type: String,
required: true,
minlength: 5,
maxlength: 250
}
});
const bikeSchema = new mongoose.Schema({
make: {
makename: modelSchema
}
})
then you can access it like
console.log(bikes[0]["make"]["makename"]["makename"])

Answer 2

Two things to note:
If the returned result is a MongoDB cursor object, then you can't access via an array index. You'll need to retrieve the item from the cursor using the appropriate method.
Your first makename field points to a JSON string, not an object. You cannot access the nested makename.makename from a JSON string. You must first decode the JSON into an object before accessing the nested property.

Answer 3

This seems to be an issue with how you are storing your sub documents.
For example:
bikes[0].make.makename is actually a string, not a valid object. You won't be able to JSON.parse this string either, because you would have to wrap each key/value with escaped double quotes.
If you are able to store this sub-document correctly, then you should be good to use the object in the way you expect!