The copy plugin allows copying attachment from one record to
another.
plugin :copy
It adds a Attacher#copy method, which accepts another
attacher, and copies the attachment from it:
photo.image_attacher.copy(other_photo.image_attacher)
This method will automatically be called when the record is duplicated:
duplicated_photo = photo.dup duplicated_photo.image #=> #<Shrine::UploadedFile> duplicated_photo.image != photo.image