📖 Document-based RAG chat assistant with Google Drive, Supabase & OpenAI
⚡ 528 views · 📖 Internal Wiki & Knowledge Base
Description
What is this?
This RAG workflow allows you to build a smart chat assistant that can answer user questions based on any collection of documents you provide. It automatically imports and processes files from Google Drive, stores their content in a searchable vector database, and retrieves the most relevant information to generate accurate, context-driven responses. The workflow manages chat sessions and keeps the document database current, making it adaptable for use cases like customer support, internal knowledge bases, or HR assistant etc.
How it works
1. Chat RAG Agent
- Uses OpenAI for responses, referencing only specific data from the vector store (data that is uploaded on google drive folder).
- Maintains chat history in Postgres using a session key from the chat input.
2. Data Pipeline (File Ingestion)
- Monitors Google Drive for new/updated files and automatically updates them in vector store
- Downloads, extracts, and processes file content (PDFs, Google Docs).
- Generates embeddings and stores them in the Supabase vector store for retrieval.
3. Vector Store Cleanup
- Scheduled and manual routines to remove duplicate or outdated entries from the Supabase vector store.
- Ensures only the latest and unique documents are available for retrieval.
4. File Management
- Handles folder and file creation, upload, and metadata assignment in Google Drive.
- Ensures files are organized and linked with their corresponding vector store entries.
Getting Started
- Create and connect all relevant credentials
- Google Drive
- Postgres
- Supabase
- OpenAI
- Run the table creation nodes first to set up your database tables in Postgres
- Upload your documents through Google Drive (or swap out for a different file storage solution)
- The agent will process them automatically (chunking text, storing tabular data in Postgres)
- Start asking questions that leverage the agent’s multiple reasoning approaches
Customization (optional)
This template provides a solid foundation that you can extend by:
- Tuning the system prompt for your specific use case
- Adding document metadata like summaries
- Implementing more advanced RAG techniques
- Optimizing for larger knowledge bases
- Note, if you’re using a different nodes eg. file storage, vector store etc the integration may vary a little
Prerequisites
- Google account (google drive)
- Supabase account
- OpenAI APIs
- Postgres account
🔗 Nodes Used
Google Drive, Google Drive Trigger, Supabase, Schedule Trigger, AI Agent, Embeddings OpenAI
📥 Import
Download workflow.json and import into n8n:
Workflow menu → Import from File