analog-analytics/paperclip-meta — pull request #3 by rstawarz (2014-08-25 20:16:32+00:00)
Title: Add rake task for reprocessing only meta data

The previous way of generating meta data for existing
Paperclip::Attachments was to reprocess them all. For existing
implementations with lots of records and many styles that take time to
resize and process thumbnails that could be a lot of overkill. This
creates a simple task that only generates the meta data for existing
attachments and their styles.