MongoDB with Mongoose (Node.js)

Uses Mongoose 9.11. The code is an ordinary application for the original database; nothing in it knows about MachNoSQL.

The only change

mongodb://app:secret@mongo.example.com:27017/shop?authSource=admin
mongodb://app:secret@machnosql.example.com:27017/shop?authSource=admin

The address comes from the environment variable MONGODB_URI, so switching to MachNoSQL changes configuration only.

Run

export MONGODB_URI='mongodb://app:secret@machnosql.example.com:27017/shop?authSource=admin'
npm install
npm start

Source

The program as it is kept and tested in the Mach Database NoSQL repository; highlighted lines read the connection setting.

app.js

// Orders example with Mongoose models, unchanged on MachNoSQL.
import mongoose from "mongoose";

const orderSchema = new mongoose.Schema({
  customer: { type: String, required: true, index: true },
  item: { type: String, required: true },
  qty: { type: Number, min: 1 },
  price: Number,
});
const Order = mongoose.model("Order", orderSchema);

await mongoose.connect(process.env.MONGODB_URI);

await Order.deleteMany({});
await Order.create([
  { customer: "ada", item: "keyboard", qty: 1, price: 49.0 },
  { customer: "ada", item: "mouse", qty: 2, price: 19.5 },
  { customer: "linus", item: "monitor", qty: 1, price: 199.0 },
]);

const mouse = await Order.findOne({ item: "mouse" }).lean();
console.log(mouse);
await Order.updateOne({ item: "mouse" }, { $inc: { qty: 1 } });

const revenue = await Order.aggregate([
  { $group: { _id: "$customer", revenue: { $sum: { $multiply: ["$qty", "$price"] } } } },
  { $sort: { revenue: -1 } },
]);
console.log(revenue);

await mongoose.disconnect();

package.json

{
  "name": "machnosql-example-mongoose",
  "private": true,
  "type": "module",
  "scripts": { "start": "node app.js" },
  "dependencies": { "mongoose": "^9.11.4" }
}