gistfile1.rb

#
# https://www.pivotaltracker.com/projects/69655?story_id=10380873
#
# It appears some of the photos are missing styles.
# It could be the style was added to has_attached_file in MlsPhoto
# and the photos were never reprocessed at that time.
# This utility class will walk through the MlsPhotos
# and reprocess any who's styles are missing from disk.
#
class MlsPhotoReprocessor
  extend ActionView::Helpers::NumberHelper
  
  def self.reprocess!
    count = MlsPhoto.count
    index = 0
    MlsPhoto.find_in_batches do |mls_photos|
      puts "examining batch #{index} of #{count} (#{percentage(index, count)})"
      index += mls_photos.length
      mls_photos.each do |mls_photo|
        photo = mls_photo.photo
        photo.styles.keys.each do |style|
          path = photo.path(style)
          unless File.exists?(path)
            puts "missing: #{path}"
            photo.reprocess!
          end
        end
      end
    end
  end
  
private

  def self.percentage(index, count)
    number_to_percentage((index.to_f / count.to_f) * 100, :precision => 0)
  end
  
end