# Automatic service with Gemini and Postgres: n8n workflow

> Started by another system calling it, and works across Postgres and Redis. It puts Gemini behind a retrieval step, so answers are drawn from documents you...

Source: https://millionrounds.com/workflow/automatic-service-with-gemini-and-postgres (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Data collection](https://millionrounds.com/workflows?category=Data+collection#library)

# Automatic service with Gemini and Postgres

Started by another system calling it, and works across Postgres and Redis. It puts Gemini behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 22 steps, 3 branches, 1 loop or waits: large, and worth reading before you trust it with anything live.

Large Calls a model: Gemini Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fautomatic-service-with-gemini-and-postgres)

**22 steps** Large: read it before trusting it with anything live

**3** Branches: places the flow splits

**1** Loop or waits

**2** Services it connects to

## The flow

Starts it 2 Model 4 Logic 9 Service 7

The steps in the order they run, from what starts it.

- 1 **Google Gemini Chat Model** Lm Chat Google Gemini *Model*
- 2 **Redis Chat Memory** Memory Redis Chat *Model*
- 3 **Webhook1** Webhook *Starts it*
- 4 **Schedule Trigger** Schedule trigger *Starts it*
- 5 **memoria** Memory Postgres Chat *Model*
- 6 **Agente IA** Agent *Model*
- 7 **Tratar mensagem** Set *Logic*
- 8 **Delete table or rows** Postgres *Service*
- 9 **Enviar texto** Evolution Api *Service*
- 10 **Buffer Mensagem** Redis *Service*
- 11 **Wait** Wait *Logic*
- 12 **Resgata Mensagens** Redis *Service*
- 13 **If1** If *Logic*
- 14 **Edit Fields** Set *Logic*
- 15 **No Operation, do nothing1** No Op *Logic*
- 16 **Apaga Buffer** Redis *Service*
- 17 **From me?** If *Logic*
- 18 **chave block** Redis *Service*
- 19 **Redis** Redis *Service*
- 20 **If** If *Logic*
- 21 **No Operation, do nothing** No Op *Logic*
- 22 **Date & Time** Date Time *Logic*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 22, with 3 branches, 1 loop or waits
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Postgres, Redis
- **Model:** Gemini
- **Retrieval:** Answers are drawn from documents you supply, not from the model alone

## Questions

What does it need to run?

An n8n account, plus your own Postgres and Redis accounts, and a key for Gemini. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls Gemini. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 22 steps it is large: read it before trusting it with anything live.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 22 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fautomatic-service-with-gemini-and-postgres)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Postgres](https://millionrounds.com/workflows?service=Postgres#library)[Redis](https://millionrounds.com/workflows?service=Redis#library)

## Workflows like it

Also data collection, with the same services where possible, closest in size first.

- [**Automate customer retention with Stripe** 22 steps · calls a model · Gmail, Google Sheets](https://millionrounds.com/workflow/automate-customer-retention-with-stripe)
- [**Serve a RAG chat backend for Next.js with OpenAI and Redis** 23 steps · calls a model · Pinecone, Postgres](https://millionrounds.com/workflow/serve-a-rag-chat-backend-for-next-js-with-openai-and-redis)
- [**Generate Complete Database Schemas with Claude** 20 steps · calls a model · Postgres](https://millionrounds.com/workflow/generate-complete-database-schemas-with-claude)
- [**Taxi service provider with Grok and Postgres** 24 steps · calls a model · Postgres, Redis](https://millionrounds.com/workflow/taxi-service-provider-with-grok-and-postgres)
- [**Triage emergency patients with OpenAI** 20 steps · calls a model · Postgres](https://millionrounds.com/workflow/triage-emergency-patients-with-openai)
- [**Conversing with OpenAI and Postgres** 25 steps · calls a model · Postgres](https://millionrounds.com/workflow/conversing-with-openai-and-postgres)