Automation library · Content

Ingest RAG documents into Postgres pgvector with OpenAI

Started by someone opening a chat with it, and works across in-memory vectors. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 12 steps: a working afternoon to understand properly.

MediumCalls a model: OpenAIRetrieval

12 stepsMedium: a working afternoon
0Branches: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 2Model 9Service 1

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

  1. 1Run ingestionManual triggerStarts it
  2. 2Embeddings (ingest)Embeddings Open AiModel
  3. 3Recursive text splitterText Splitter Recursive Character Text SplitterModel
  4. 4Ask a questionChat triggerStarts it
  5. 5OpenAI Chat ModelLm Chat Open AiModel
  6. 6Embeddings (query)Embeddings Open AiModel
  7. 7Conversation memoryMemory Buffer WindowModel
  8. 8Download demo documentHttp RequestService
  9. 9Insert into vector storeVector Store In MemoryModel
  10. 10Document loaderDocument Default Data LoaderModel
  11. 11RAG agentAgentModel
  12. 12Knowledge base retrieverVector Store In MemoryModel

How it's built

Starts on
Someone opening a chat with it
Steps
12
Size
Medium: a working afternoon
Connects to
in-memory vectors
Model
OpenAI
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 in-memory vectors account, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls OpenAI. 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?

Plan an afternoon. 12 steps is enough that you should read each one before running it.

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 12 steps before you point it at anything that matters.