SR051

Severity: error

Summary: upload field exists in schema but is not type file

What this means

An endpoint’s upload.field names a field that exists in the schema but is not declared as type: file. Only file-typed fields can be used as upload targets — they map to multipart form data handling in the runtime.

Example that triggers this

schema:
  title: { type: string, required: true }
endpoints:
  upload_file:
    method: POST
    path: /assets/upload
    input: [title]
    upload:
      field: title
      storage: s3
      max_size: 5mb

How to fix it

Change the referenced field’s type to file in the schema:

title: { type: file, required: true }