Paperclip how to change basename (filename)?

Question

I am trying to change the basename (filename) of photos:

In my model I have:

  attr_accessor :image_url, :basename

  has_attached_file :image,
                  


        

Answer 1

Paperclip now allows you to pass in a FilenameCleaner object when setting up has_attached_file.

Your FilenameCleaner object must respond to call with filename as the only parameter. The default FilenameCleaner removes invalid characters if restricted_characters option is supplied when setting up has_attached_file.

So it'll look something like:

has_attached_file :image,
                  filename_cleaner: MyRandomFilenameCleaner.new
                  styles: { thumbnail: '100x100' }

And MyRandomFilenameCleaner will be:

class MyRandomFilenameCleaner
  def call(filename)
    extension = File.extname(filename).downcase
    "#{Digest::SHA1.hexdigest(filename + Time.current.to_s).slice(0..10)}#{extension}"
  end
end

You could get away with passing in a class that has a self.call method rather than an object but this conforms to Paperclip's documentation in Attachment.rb.