Paperclip - Validate File Type but not Presence

Question

I am using paperclip to handle my file uploads, and in one situation I don\'t want the file to be mandatory. I do however want to make sure it is a specific file type when i

Answer 1

I guess you could try a 'conditional validation' where the condition is if a file is present?

class TestModel < ActiveRecord::Base
  #stuff
  has_attached_file :sound #etc...
  validates_attachment_content_type :sound, :content_type => ['audio/mp3', 'application/x-mp3'], :if => :sound_attached?

  def sound_attached?
    self.sound.file?
  end
end