From: Rick Lloyd <redmine@...>
Date: 2009-04-27T15:35:02+09:00
Subject: [ruby-core:23326] [Bug #1414] NameError (undefined method `path' for class `ActionController::UploadedStringIO')

Bug #1414: NameError (undefined method `path' for class `ActionController::UploadedStringIO')
http://redmine.ruby-lang.org/issues/show/1414

Author: Rick Lloyd
Status: Open, Priority: Normal
ruby -v: ruby 1.9.2dev (2009-04-25 trunk 23281) [powerpc-darwin9.6.0]

See also Ruby bug #1271

Processing ApplicationController#create (for 127.0.0.1 at 2009-04-26 19:00:26) [POST]
  Parameters: {"authenticity_token"=>"cP8NCg4Exg4e22Ijs/bRLpgzjnVwmwspKi8QnF4Xi40=", "mugshot"=>{"uploaded_data"=>#<File:/var/folders/JP/JP7pZWhAHLy-es7AYViHF++++TI/-Tmp-/RackMultipart50621-2>}, "commit"=>"Create"}

NameError (undefined method `path' for class `ActionController::UploadedStringIO'):
  <internal:prelude>:8:in `synchronize'
  thin (1.0.0) lib/thin/connection.rb:63:in `pre_process'
  thin (1.0.0) lib/thin/connection.rb:54:in `process'
  thin (1.0.0) lib/thin/connection.rb:39:in `receive_data'
  eventmachine (0.12.6) lib/eventmachine.rb:240:in `run_machine'
  eventmachine (0.12.6) lib/eventmachine.rb:240:in `run'
  thin (1.0.0) lib/thin/backends/base.rb:57:in `start'
  thin (1.0.0) lib/thin/server.rb:150:in `start'

The problem is triggered when using attachment_fu, with file_storage, to load a jpg image into a rails application.

The problem occurs on only the first create after restarting the server (thin).  After the first failed create, a browser reload  with no change in data will succeed.  Also all following creates will succeed.

I'm not assuming this to be a ruby bug but am unable to track the problem any closer than prelude.rb in the ruby source.

The previous issue (bug #1271) looks to be the same as mine.  If I use webrick instead of thin for the server I get a server crash.

I've attached a gz tarfile of the minimum needed to repeat the problem.  I have not included rails, thin, or any other of the standard gems.  The mugshots/vendor/plugins does contain attachment_fu as I needed to submit a change to that gem (: no longer and alias for then).  I've included a GEM-LIST (gem list) file fyi.

Here are the steps:

In terminal:
gzcat mugshots.tar.gz | tar xvf -
cd mugshots
rake db:migrate
script/server thin

In browser:
http://localhost:3000/mugshots/new
use "Browse..." to select ".../mugshots/DSCN0925.jpg"
use "Create" to demonstrate problem
use browser "Reload Current Page" and "Resend" buttons to successfully load attached image
click "New shot" link
use "Browse..." to select ".../mugshots/DSCN0913.jpg"
use "Create" to successfully load attached image


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