Dir.chdir causes application error

Rails
1

I am getting an application error when I try to use Dir.chdir in a
layout

<% Dir.chdir(‘public’) %>

The complete dump from development.log is listed below.

When I try the same thing in the console, it works fine.

Loading development environment.

Dir.chdir(‘public’)
=> 0

Any ideas on what the problem is, or how to fix it?

Thanks

Output from development.log

Processing LeagueController#index (for 71.74.192.170 at 2007-06-26
22:28:42) [GET]
Session ID: c2618c4e3154c6d62f1c6dd055a9deb1
Parameters: {“action”=>“index”, “controller”=>“league”}

Errno::ENOENT (No such file or directory - script/…/config/…/tmp/
sessions//ruby_sess.6117ae9afe83d621):
/usr/lib/ruby/1.8/pstore.rb:295:in initialize' /usr/lib/ruby/1.8/pstore.rb:295:inopen’
/usr/lib/ruby/1.8/pstore.rb:295:in transaction' /usr/lib/ruby/1.8/cgi/session/pstore.rb:81:inupdate’
/usr/lib/ruby/1.8/cgi/session/pstore.rb:88:in close' /usr/lib/ruby/1.8/cgi/session.rb:324:inclose’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/base.rb:1184:in close_session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action_controller/base.rb:1228:inprocess_cleanup_without_flash’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/flash.rb:146:in process_cleanup_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action_controller/filters.rb:662:inprocess_cleanup_without_session_management_support’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/session_management.rb:124:in
process_cleanup_without_components' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action_controller/components.rb:178:inprocess_cleanup’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/base.rb:435:in process_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action_controller/filters.rb:624:inprocess_without_session_management_support’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/session_management.rb:114:in process' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action_controller/base.rb:330:inprocess’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in
dispatch' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb: 113:inhandle_dispatch’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:
79:in service' /usr/lib/ruby/1.8/webrick/httpserver.rb:104:inservice’
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in run' /usr/lib/ruby/1.8/webrick/server.rb:173:instart_thread’
/usr/lib/ruby/1.8/webrick/server.rb:162:in start' /usr/lib/ruby/1.8/webrick/server.rb:162:instart_thread’
/usr/lib/ruby/1.8/webrick/server.rb:95:in start' /usr/lib/ruby/1.8/webrick/server.rb:92:ineach’
/usr/lib/ruby/1.8/webrick/server.rb:92:in start' /usr/lib/ruby/1.8/webrick/server.rb:23:instart’
/usr/lib/ruby/1.8/webrick/server.rb:82:in start' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb: 63:indispatch’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/
webrick.rb:59
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ dependencies.rb:342:innew_constants_in’
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:ingem_original_require’
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require’
script/server:3

Rendering /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/templates/rescues/layout.rhtml (500 Internal Error)
No such file or directory - script/…/config/…/tmp/sessions//
ruby_sess.6117ae9afe83d621
/usr/lib/ruby/1.8/pstore.rb:295:in initialize' /usr/lib/ruby/1.8/pstore.rb:295:inopen’
/usr/lib/ruby/1.8/pstore.rb:295:in transaction' /usr/lib/ruby/1.8/cgi/session/pstore.rb:81:inupdate’
/usr/lib/ruby/1.8/cgi/session/pstore.rb:88:in close' /usr/lib/ruby/1.8/cgi/session.rb:324:inclose’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
base.rb:1184:in close_session' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:1228:inprocess_cleanup_without_flash’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
flash.rb:146:in process_cleanup_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ filters.rb:662:inprocess_cleanup_without_session_management_support’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
session_management.rb:124:in process_cleanup_without_components' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ components.rb:178:inprocess_cleanup’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
base.rb:435:in process_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ filters.rb:624:inprocess_without_session_management_support’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/
session_management.rb:114:in process' /usr/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/ base.rb:330:inprocess’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in
dispatch' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:113:inhandle_dispatch’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in
service' /usr/lib/ruby/1.8/webrick/httpserver.rb:104:inservice’
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in run' /usr/lib/ruby/1.8/webrick/server.rb:173:instart_thread’
/usr/lib/ruby/1.8/webrick/server.rb:162:in start' /usr/lib/ruby/1.8/webrick/server.rb:162:instart_thread’
/usr/lib/ruby/1.8/webrick/server.rb:95:in start' /usr/lib/ruby/1.8/webrick/server.rb:92:ineach’
/usr/lib/ruby/1.8/webrick/server.rb:92:in start' /usr/lib/ruby/1.8/webrick/server.rb:23:instart’
/usr/lib/ruby/1.8/webrick/server.rb:82:in start' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:63:indispatch’
/usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/
webrick.rb:59
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
gem_original_require' /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:inrequire’
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' /usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/ dependencies.rb:342:innew_constants_in’
/usr/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/
dependencies.rb:495:in require' /usr/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39 /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:ingem_original_require’
/usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
`require’
script/server:3

2

what do you get if do it like this:

<% Dir.chdir( “#{RAILS_ROOT}/public” ) %>

?

marcel

3

On Jun 27, 2:15 am, lanzm [email protected] wrote:

what do you get if do it like this:

<% Dir.chdir( “#{RAILS_ROOT}/public” ) %>

This produces the same error.

4

rails is looking for a session file relative to the current working
directory, which is normally RAILS_ROOT. but when you did a chdir,
you changed the current directory and now rails can’t find the session
file it wants.

answer is don’t change the working directory. why would you need to?

5

meant to show an example

Loading development environment.

Dir.getwd
=> “/home/chall/MyApp”

Dir.chdir(‘public’)
=> 0

Dir.getwd
=> “/home/chall/MyApp/public”

RAILS_ROOT
=> “script/…/config/…/config/…”

so now, if rails tries to load a file using RAILS_ROOT, it will look in

/home/chall/MyApp/public/script/…/config/…/config/…

instead of

/home/chall/MyApp/script/…/config/…/config/…