Paperclip or Google Cloud Storage issue when renaming paths - ruby-on-rails

Question

I've a Rails app with Paperclip and I use Google Cloud Storage. So far so good.
To avoid having both development and production using the same storage, I decided to change the default Paperclip path to another based based on the environment. This way every env has his own directory. Then I consistently moved the old images from the default Paperclip path to the new ones.
The problem is that now old images give a 404, whereas any new image I upload works properly. Is there any way to fix that?
Here it's the previous settings:
module MyApp
class Application < Rails::Application
config.paperclip_defaults = {
storage: :fog,
fog_public: true,
fog_directory: 'myapp-01',
fog_credentials: {
google_storage_access_key_id: ENV['GOOGLE_STORAGE_ID'],
google_storage_secret_access_key: ENV['GOOGLE_STORAGE_SECRET'],
provider: 'Google'
}
}
}
I override the default using the following settings:
path: ":rails_env/:class/:attachment/:id_partition/:style/:filename",
url: "/:rails_root/:class/:attachment/:id_partition/:style/:filename"
My guess is that it's not sufficient to update Paperclip config with the new path and move all images to the new directory. You need also to update the old records...
If you wonder, the old records point to root/images/?123456789.

Answer 1

Your guess is right. Changing the config is not enough, you need to move the files. This, is better left for a rake task or background job. I have some code for S3, but it should give you an idea of how to implement it for Google:
def old_key(image, file_name_field)
# Previous `:path`: '/:class/:attachment/:id/:style/:filename'
klass = self.class.to_s.pluralize.downcase
attachment = image.pluralize
"#{klass}/#{attachment}/#{id}/original/#{send(file_name_field)}"
end
def re_path(image)
file_name_field = "#{image}_file_name"
return if send(file_name_field).blank?
old_object = bucket.object(old_key(image, file_name_field))
return unless old_object.exists?
Rails.logger.warn "Re-saving image attachment #{self.class}/#{id}"
send "#{image}=", URI.parse(old_object.public_url)
save
end
I'm basically building the old path using my own interpolation, finding the object in S3 (hence key/object lingo) and re-download every image from S3. Be careful with this, since you might incur in extra cost for downloading rather than just moving, if that's someone Google allows.
Then I just called this method on every image for every object:
Object.each do { |o| o.re_path(:logo); o.re_path(:background); }