Модели товара и категории

const shSubcategories = new Schema({
  title: String
});
 
const shCategories = new Schema({
  title: String,
  subcategories: [shSubcategories]
});
 
const shProduct = new Schema({
  title: String,
  description: String,
  price: Number,
  category: Schema.Types.ObjectId,
  subcategory: Schema.Types.ObjectId,
  images: [String]
});

const mongoose = require('mongoose');
const connection = require('../libs/connection');
 
const subCategorySchema = new mongoose.Schema({
  title: {
    type: String,
    required: true,
  },
});
 
const categorySchema = new mongoose.Schema({
  title: {
    type: String,
    required: true,
  },
  subcategories: [
    subCategorySchema,
  ],
});
 
module.exports = connection.model('Category', categorySchema);

const mongoose = require('mongoose');
const connection = require('../libs/connection');
 
const productSchema = new mongoose.Schema({
  title: {
    type: String,
    required: true,
  },
  description: {
    type: String,
    required: true,
  },
  price: {
    type: Number,
    required: true,
  },
  category: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'Category',
    required: true,
  },
  subcategory: {
    type: mongoose.Schema.Types.ObjectId,
    ref: 'SubCategory',
    required: true,
  },
  images: [
    String,
  ],
});
 
module.exports = connection.model('Product', productSchema);