Restore Cached Data
The restore_cached_data plugin re-extracts metadata
when assigning already cached files, i.e. when the attachment has been retained
on validation errors or assigned from a direct upload. In both cases you may
want to re-extract metadata on the server side, mainly to prevent tempering,
but also in case of direct uploads to obtain metadata that couldn't be
extracted on the client side.
plugin :restore_cached_dataphoto.image = {"id" => "path/to/image.jpg", "storage" => "cache", "metadata" => {} }photo.image.metadata #=> { "size" => 4823763, "mime_type" => "image/jpeg", ... } It uses the refresh_metadata plugin to re-extract
metadata.