Rake Routes project_attachment_path

Hello, I'm trying to create a project_attachment_path

In my routes I have:

  resources :projects do     collection do         get "attachments/:id/:style.:format" => "attachments#download", :as => :attachment     end     end

**Problem is in RAKE ROUTES:**

    attachment_projects GET /projects/ attachments/:id/:style.:format {:action=>"download", :controller=>"attachments"}

It's backwards? Any ideas what I did wrong?

Thanks