MongoDB add a 'self' type - mongodb

Question

I am new at MongoDB. I am trying to create 2 db's :
1 - Dogs
2 - Person
I want a person to have 0, 1 or more dogs, and a partner (who is also a person)
tried to do:
var dogSchema = new mongoose.Schema({
name: String,
age: Number,
breed: String
});
var Dog = mongoose.model("Dog", dogSchema);
var personSchema = new mongoose.Schema({
name: String,
age: Number,
partner: this,
dogs: [
{
type: mongoose.Schema.Types.ObjectId,
ref: "Dog"
}
]
});
var Person = mongoose.model("Person", personSchema);
But when I try to create a new person, things getting complicated.
what is the best way to do this?

Answer 1

This code work fine for me:
"use strict"
const mongoose = require('mongoose');
const categorySchema = mongoose.Schema({
name: String,
parent: {type:mongoose.Schema.Types.ObjectId, ref:"Category"},
subcategory: {type:mongoose.Schema.Types.ObjectId, ref:"Category"},
});
const Category = mongoose.model('Category', categorySchema);
async function run() {
await mongoose.connect("mongodb://localhost:27017/mongoose-test");
const category = new Category({name:"Name"});
const subcategory = new Category({name:"Name 2", parent:category});
category.subcategory = subcategory;
await Promise.all([category.save(), subcategory.save()]);
};
run();
Mongo:
> db.categories.find();
{ "_id" : ObjectId("59f4a8f32ebdb940cc2bed3a"), "subcategory" :
ObjectId("59f4a8f32ebdb940cc2bed3b"), "name" : "Name", "__v" : 0 }
{ "_id" : ObjectId("59f4a8f32ebdb940cc2bed3b"), "name" : "Name 2",
"parent" : ObjectId("59f4a8f32ebdb940cc2bed3a"), "__v" : 0 }