Apply getters on lean() documents: https://mongoosejs.com/docs/tutorials/lean.html
const mongoose = require('mongoose');
const mongooseLeanGetters = require('mongoose-lean-getters');
const schema = mongoose.Schema({
name: {
type: String,
// Get the last 6 characters of the string
get: v => v.slice(-6)
}
});
// Add this plugin to apply getters when using `lean()`.
schema.plugin(mongooseLeanGetters);
await Model.create({ name: 'Captain Jean-Luc Picard' });
const doc = await Model.findOne().lean({ getters: true });
doc.name; // 'Picard'