In my Rails 3.2.2 project, I have the following:

class Photo < ActiveRecord::Base
  belongs_to :album
  default_scope order: :title

  extend FriendlyId
  friendly_id :title, :use => :slugged
  validates :title, :presence => true
  validates :title, :uniqueness => {:scope => :album_id}
  validates :file, :attachment_presence => true

  has_attached_file :file, :path => (Rails.root + "photos/:id/:style/:filename").to_s,
                           :url => "/photos/:style/:id",
                           :styles => { :small => "450x450>"}
end

class PhotoTest < ActiveSupport::TestCase
  should belong_to(:album)

  should validate_presence_of(:title)
  should have_attached_file(:file)
  should validate_attachment_presence(:file)
end

The 'should validate_attachment_presence(:file)' test always flunks, but I can't figure out why. I have other unit tests with required attachments that test out fine.

Any ideas?

• ruby-on-rails
• ruby-on-rails-3
• paperclip
• paperclip-validation

For me the problem disappeared after I upgraded to Paperclip 3.0.3 - seems like the bug is now fixed.