SR053

Severity: error

Summary: upload storage backend is not one of: local, s3, gcs, azure

What this means

An endpoint’s upload.storage value is not one of the four supported backends: local, s3, gcs, or azure. Shaperail rejects unknown backends at parse time rather than failing silently at runtime.

Example that triggers this

upload:
  field: file
  storage: ftp
  max_size: 5mb

How to fix it

Use one of the supported storage backends:

upload: { field: file, storage: s3, max_size: 5mb }