mongoose_text_index.js

const Mongoose = require('mongoose');

Mongoose.Promise = Promise;
Mongoose.connect(`mongodb://localhost/test-${Date.now()}`);

const PersonSchema = new Mongoose.Schema({
  name: {
    first: { type: String },
    last:  { type: String }
  }
});

// Set up first version of the text index.
PersonSchema.index({ 'name.first': 'text' });

const Person = Mongoose.model('Person', PersonSchema);

Person.ensureIndexes()
  .then(() => {
    // Set up new version of text index.
    PersonSchema.index({ 'name.first': 'text', 'name.last': 'text' });
    return Person.ensureIndexes();
  })
  .then(() => {
    console.log('It worked.');
    process.exit();
  })
  .catch(error => {
    console.error(error.stack);
    process.exit(1);
  });

package.json

{
  "name": "mongoose-text-nested-field",
  "version": "1.0.0",
  "description": "",
  "main": "mongoose_text_index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+ssh://git@gist.github.com/30c4196e58d47d07499cf6403833b2bd.git"
  },
  "author": "",
  "license": "ISC",
  "bugs": {
    "url": "https://gist.github.com/30c4196e58d47d07499cf6403833b2bd"
  },
  "homepage": "https://gist.github.com/30c4196e58d47d07499cf6403833b2bd",
  "dependencies": {
    "mongoose": "^4.5.10"
  }
}