Does not support Mongoid::Versioning

[mull]

In a model like:

class Mockup
  include Mongoid::Document
  include Mongoid::Paperclip
  include Mongoid::Versioning

  has_mongoid_attached_file :screenshot,
    :url => '/system/mockups/:id/:version/:id.:extension',
    :path => ':rails_root/public:url'

  Paperclip.interpolates :version  do |attachment, style|
    attachment.instance.version
  end
end

Attached files are not kept when updating the model, Paperclip throws them away and on top of that the ':version' part of the url remains '1' (<%= image_tag mockup.screenshot %>).

[mull]

So the :url is actually updated, it's the :path that is not correctly updated according to :version.