How to build an AI chatbot with Ruby on Rails and ChatGPT

How to build an AI that can answer questions about your website.

This tutorial walks through a simple example of crawling a website (in this example, the Rubyroidlabs website), turning the crawled pages into embeddings using the Embeddings API, and then creating a basic search functionality that allows a user to ask questions about the embedded information. This is intended to be a starting point for more sophisticated applications that make use of custom knowledge bases.

Inspired from this blog post: https://medium.com/@rubyroidlabs/how-to-build-an-ai-chatbot-with-ruby-on-rails-and-chatgpt-9a48f292c37c

Table of Contents

• Introduction

• Setup

  • Initialize Ruby on Rails project with PostgreSQL
  • Setup PGVector
  • Setup OpenAI
  • Build a simple chat with Hotwired

• Prototype

  • Chat API
  • Deal-breaker

• Embeddings

  • Data Chunks
  • Vector
  • How to find the most relevant chunks

• Summary