Auto orienting image when using delayed job - ruby-on-rails

Question

I have a photo sharing application that allows the user to drag and drop images which are then processed in delayed job and displayed in a gallery. I'm having some problems solving the problem with orientation on iPhone pictures. I have the following code:
initializers/auto_orient.rb
module Paperclip
class AutoOrient < Paperclip::Processor
def initialize(file, options = {}, *args)
#file = file
end
def make( *args )
dst = Tempfile.new([#basename, #format].compact.join("."))
dst.binmode
Paperclip.run('convert',"#{File.expand_path(#file.path)} -auto-orient #{File.expand_path(dst.path)}")
return dst
end
end
end
models/picture.rb
class Picture < ActiveRecord::Base
belongs_to :gallery
before_create :generate_slug
after_create :send_to_delayed_job
validates :slug, :uniqueness => true
scope :processing, where(:processing => true)
attr_accessible :image
has_attached_file :image,
:styles => {
:huge => "2048x1536>",
:small => "800x600>",
:thumb => "320x240>"
},
:processors => [:auto_orient, :thumbnail]
before_post_process :continue_processing
...
def process
self.image.reprocess!
self.processing = false
self.save(:validations => false)
end
private
def continue_processing
if self.new_record?
!self.processing
end
end
def send_to_delayed_job
Delayed::Job.enqueue ImageProcess.new(self.id), :queue => 'paperclip'
end
end
models/image_process.rb
class ImageProcess < Struct.new(:picture_id)
def perform
picture = Picture.find(self.picture_id)
picture.process
end
end
If I comment out the lines after_create :send_to_delayed_job and before_post_process i.e. the processing is done on the spot, the auto-orientation process works. But, when I put it through delayed job, no auto-orientation happens, just the resizing.
Does anyone have any ideas?
EDIT
It get's stranger. I moved to Carrierwave and the carrierwave_backgrounder gem. Ignoring background tasks for now, I have the following in my image_uploader.rb:
def auto_orient
manipulate! do |img|
img.auto_orient!
img
end
end
version :huge do
process :auto_orient
process resize_to_fit: [2048,1536]
end
This works. The images are in the correct orientation.
Now, if I add process_in_background :image to my picture.rb file in accordance with the instructions for carrier wave_backgrounder, auto_orient doesn't work.
I'm now going to try the store_in_background method to see if that makes a difference.

Answer 1

I noticed you have attr_accessible in your Picture model. I have been working with Delayed_Job recently and after many hours of struggling with it I figured out that it has serious issues with attr_accessible. There are workarounds, though.
More info is here (although you can Google for more on the topic)