Ruby deployment server problem: Missing the Rails 2.3.5 gem.

Question

Hi, I'm trying to install a rails server for my application. I'm using ubuntu 10.04 TLS with apache2 as web server. I made some search on google but I do not found something that help me. When I tried to connect on my application I have following error:

The application has exited during startup (i.e. during the evaluation of config/environment.rb). The error message can be found below. To solve this problem, please follow any instructions in the error message.

Error message: Missing the Rails 2.3.5 gem. Please gem install -v=2.3.5 rails, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

So I do not understand since rails is installed:

          desktop:/etc/apache2$ rails -v
          Rails 2.3.5

gem list:

      gem list

      *** LOCAL GEMS ***

      abstract (1.0.0)
      actionmailer (2.3.5)
      actionpack (2.3.5)
      activerecord (2.3.5)
      activeresource (2.3.5)
      activesupport (2.3.5)
      arel (1.0.1)
      builder (2.1.2)
      bundler (1.0.0)
      cgi_multipart_eof_fix (2.5.0)
      daemon_controller (0.2.5)
      daemons (1.1.0)
      erubis (2.6.6)
      fastthread (1.0.7)
      file-tail (1.0.5)
      gem_plugin (0.2.3)
      i18n (0.4.1)
      linecache (0.43)
      mail (2.2.5)
      mime-types (1.16)
      mongrel (1.1.5)
      needle (1.3.0)
      net-ssh (1.1.4)
      passenger (2.2.15)
      polyglot (0.3.1)
      rack (1.0.1)
      rack-mount (0.6.13)
      rack-test (0.5.4)
      rails (2.3.5)
      rake (0.8.7)
      ruby-debug-base (0.10.3)
      ruby-debug-ide (0.4.5)
      rubyzip (0.9.4)
      spruz (0.1.5)
      sqlite3-ruby (1.3.1)
       thor (0.14.0)
      treetop (1.4.8)
      tzinfo (0.3.23)

MORE INFO: I'm developping on windows and my server is a Linux maybe the problem is there. I don't know. anyway thanks in advance for help.

Even if I'm root user I cannot open console:

   root@et1-desktop:/home/et1/wip3/sophia/script# ./console
   Loading development environment (Rails 2.3.5)
   sh: irb: not found


gem environment
RubyGems Environment:
 - RUBYGEMS VERSION: 1.3.7
 - RUBY VERSION: 1.8.7 (2010-01-10 patchlevel 249) [x86_64-linux]
 - INSTALLATION DIRECTORY: /usr/lib/ruby/gems/1.8
 - RUBY EXECUTABLE: /usr/bin/ruby1.8
 - EXECUTABLE DIRECTORY: /usr/bin
 - RUBYGEMS PLATFORMS:
 - ruby
 - x86_64-linux
 - GEM PATHS:
    - /usr/lib/ruby/gems/1.8
    - /home/et1/.gem/ruby/1.8
  - GEM CONFIGURATION:
    - :update_sources => true
    - :verbose => true
    - :benchmark => false
    - :backtrace => false
    - :bulk_threshold => 1000
    - :sources => ["http://gems.rubyforge.org/", "http://gems.rubyforge.org"]
 - REMOTE SOURCES:
    - http://gems.rubyforge.org/
    - http://gems.rubyforge.org

Answer 1

is the following line added in environment.rb

RAILS_GEM_VERSION = '2.3.5' unless defined? RAILS_GEM_VERSION

and also try this command in terminal. see is there any rails gem installed

gem list

Answer 2

It could be that the user which you are logging in at the command prompt does not have the same list of gems as the user you are running the server as.

This commonly happens when you have installed gems as the command line user without using sudo which means they will be available only to that user.

It would be worth checking where your gems are installed. If they are in a folder .gem from your user's home directory that indicates they are installed for that user only.

I would try firing up a shell as the user the server runs as and ensuring that user has the gem access you require.

Answer 3

I also saw this problem when there are multiple ruby version in the system that are refering to different gem repositories. If this is the case, these commands should help debugging:

   which ruby

   which gem

and from docs rubygem]1

   gem environment  

Answer 4

I think I found my problem, First I follow the instruction of following links: http://gembundler.com/rails23.html Next I run command rake db:migrate RAILS_ENV=production

After that the server is working fine.

Thanks to all for help.