recache plugin allows you to process your attachment after
validations succeed, but before the attachment is promoted. This is useful
for example when you want to generate some versions upfront (so the user
immediately sees them) and other versions you want to generate in the
promotion phase in a background job.
plugin :recache plugin :processing process(:recache) do |io, context| # perform cheap processing end process(:store) do |io, context| # perform more expensive processing end
Recaching will be automatically triggered in a “before save” callback, but if you're using the attacher directly, you can call it manually:
attacher.recache if attacher.changed?