Random rails filenames?

Question

Ruby on Rails

How to generate a random filename before saving. I will answer below.
For some, this is not news, but for the second time I am looking for the same solution, it's time to start writing myself :)

Answer 1

The most adequate way suggested by @Vakiliy is the standard Paperclip function, which I overlooked. From here .

has_attached_file :avatar, {
    :url => "/system/:hash.:extension",
    :hash_secret => "longSecretString"
}

On stackoverflow, googling various variations of the same method. Tyts .

class Photo < Asset
  has_attached_file :image, :path => ":class/:id/:basename_:style.:extension"
  before_create :randomize_file_name
    private
      def randomize_file_name
        extension = File.extname(image_file_name).downcase
        self.image.instance_write(:file_name, "#{ActiveSupport::SecureRandom.hex(16)}#{extension}")
      end
end

Thanks again @Vakiliy , it was early in the morning and on my fourth coffee.