Re-cache

The 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?