Description
Steps to reproduce
When having a predefined variant for an attachment and you're making use of the preprocessed option, the ActiveStorage::TransformJob will fail for previewable files like PDFs with ActiveStorage::InvariableError.
To reproduce simply define a variant for an attachment like this:
has_one_attached :file do |attachable|
attachable.variant :thumb, resize_to_limit: [400, 600], preprocessed: true
end
After uploading a PDF the ActiveStorage::TransformJob will be enqeued. As soon as the job is being processed it fails with ActiveStorage::InvariableError.
Expected behavior
The ActiveStorage::TransformJob should accept previewable files as well so preprocessed variants are also possible for PDF documents and other previewable filetypes.
Actual behavior
The ActiveStorage::TransformJob fails when a previewable blob is being processed with ActiveStorage::InvariableError
System configuration
Rails version: 7.1.1
Ruby version: 3.2.2