How to update/rename a carrierwave uploaded file?

Question

I cant figure out how to update/rename a file uploaded/managed with Carrierwave-mongoid in rails 3.2.6. I want to rename the file in the db as well as on the filesystem.

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Answer 1

I used this rake task for reprocessing uploaded images after modifying version settings (filename and image size) in my uploader file:

# Usage: rake carrierwave:reprocess class=Model
namespace :carrierwave do
  task :reprocess => :environment do

    CLASS = ENV['class'].capitalize
    MODEL = Kernel.const_get(CLASS)
    records = MODEL.all

    records.each do |record|
      record.photo.recreate_versions! if record.photo?
    end

  end
end

Notes:

• Replace "photo" with whatever you named your uploader.
• Rake tasks go in the lib/tasks folder.
• This is using Active Record, not sure if Mongoid needs something different.