1const mongoose = require("mongoose");
2const Schema = mongoose.Schema;
3//product model is not imported in orders model
4const orderSchema = new Schema(
5  {
6    // _id : mongoose.Schema.Types.ObjectId,
7    product: {
8      type: mongoose.Schema.Types.ObjectId,
9      ref: "products",//not Product
10      required: [true, "product id is required"],
11    },
12    quantity: { type: Number, default: 1, min: 1 },
13  },
14  { versionKey: false, timestamps: true }
15);
16
17module.exports = mongoose.model("orders", orderSchema);
18
19// in Orders route, no import of product is required
20const orders = require("../models/orders");
21const products = require("../models/products");
22
23orders.find()
24    .select("quantity product _id")
25    .populate({ path: 'product', model: 'products' })
26	.exce().then().catch()
27

1const mongoose = require("mongoose");
2const Schema = mongoose.Schema;
3const products = require("../models/products");
4//products model is imported
5const orderSchema = new Schema(
6  {
7    // _id : mongoose.Schema.Types.ObjectId,
8    product: {
9      type: mongoose.Schema.Types.ObjectId,
10      ref: products, //not "products"
11      required: [true, "product id is required"],
12    },
13    quantity: { type: Number, default: 1, min: 1 },
14  },
15  { versionKey: false, timestamps: true }
16);
17
18module.exports = mongoose.model("orders", orderSchema);
19
20// in Orders route, no import of product is required
21const orders = require("../models/orders");
22orders.find()
23    .select("quantity product _id")
24    .populate("product", "name price")
25	.exce().then().catch()