const mongoose = require('mongoose');
const mongooseLeanQueries = require('@jjavery/mongoose-lean-queries');

const schema = new mongoose.Schema({
  field: String
});

// Apply the plugin to a single schema
schema.plugin(mongooseLeanQueries);

// Or apply the plugin to all schemas
mongoose.plugin(mongooseLeanQueries);

const Thing = mongoose.Model('thing', schema);

async function getData(id) {
  const thing1 = await Thing.findById(id);

  // thing1 is a lean pojo with the result of _id.toString() copied to id

  const thing2 = await Thing.findById(id).lean(false);

  // thing2 is a Mongoose Document
}