Have a failsafe s3 url for paperclip attachments

attachment_extension.rb

module Paperclip
  class Attachment

    def url_with_failsafe style = default_style, include_updated_timestamp = true
      unadorned_url = url_without_failsafe(style, include_updated_timestamp)
      if in_bucket_substitution_environment? && !exists?
        unadorned_url.sub(/\/#{bucket_name}\//, '/specle-production/')
      else
        unadorned_url
      end
    end

    alias_method_chain :url, :failsafe
       
    private
    
    def in_bucket_substitution_environment?
      Rails.env.development? || Rails.env.staging? || Rails.env.qa?
    end 
  end
end