Generating a unique file path with Polymorphic Paperclip

Question

I'm running into an issue with different users uploading files with the same name being overwritten with the Polymorphic Paperclip plugin. What I'd like to do is inject the current user's ID into the URL/path. Is this possible? Would I be better off generating a random name?

Here are my current :url and :path parameter values in asset.rb:

:url => "/assets/:id/:style/:basename.:extension",
:path => ":rails_root/public/assets/:id/:style/:basename.:extension"

What I'd like to be able to do is this:

:url => "/assets/#{current_users_id}/:id/:style/:basename.:extension",
:path => ":rails_root/public/assets/#{current_users_id}/:id/:style/:basename.:extension"

Answer 1

Every time I see the word random and it relates to strings, I think GUID. Perhaps they could work for you.

Answer 2

Use Paperclip interpolations:

file config/initializers/paperclip.rb:

module Paperclip
  module Interpolations
    def user_id(attachment, style)
      current_user.id
    end
  end
end

has_ attached_file option:

:url => "/assets/:user_id/:id/:style/:filename"

(The syntax changed from Paperclip 2.x to 2.3; :path is not necessary; Use the latest version and have a look at the source, it's quite well documented.)