❗️Issue with 'Edit Fields' node and JSON structure in 'HTTP Request' (payload expects object)

[Marius_Plana_Farre]

Issue with Edit Fields node and JSON structure in HTTP Request (payload expects object)

Hi n8n community

I’m building a workflow to upload multiple PDF documents into a vector database using Qdrant. My flow is as follows:

• Read PDFs from disk
• Extract text
• Generate embeddings
• Use Edit Fields to build the structure { id, vector, payload }
• Send a POST request to Qdrant via an HTTP Request node

---

The problem

The issue occurs in the Edit Fields and/or HTTP Request node.
The payload field expects an object, but it throws an error like:

rust

CopiarEditar

'payload' expects an object but got '{ "nombre_documento": "{{ $json["text"].slice(0,50) }}", "contenido": "{{ $json["text"] }}" }'

I tried using JSON.stringify and other expressions but still got the same issue.

---

What I need help with

What is the correct way to structure the payload field as a valid JSON object so that the HTTP Request sends it correctly to Qdrant?

---

Versions

• n8n: 1.90.2
• Qdrant: v1.7.0 (self-hosted)

---

Screenshots

---

Optional: Sample Workflow

Thanks in advance for your help!

[Franz]

Seems like you missed to set the field to Expression.
I additionally removed the " and used toJsonString() for the values.