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I am new to Rails. I was asked to make some improvements to existing project. I downloaded it from Heroku. It uses ruby "1.8.7", thanks to rvm I also have it for project's directory. I managed to bundle update and bundle install. Now I try to 'rails server' and I get error messages:

/home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:55: uninitialized constant ActiveSupport::Dependencies::Mutex (NameError)
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/activesupport-2.3.5/lib/active_support.rb:56:in `require'
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/activesupport-2.3.5/lib/active_support.rb:56
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/rails-2.3.5/bin/../lib/rails_generator.rb:28:in `require'
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/rails-2.3.5/bin/../lib/rails_generator.rb:28
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/rails-2.3.5/bin/rails:14:in `require'
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/gems/rails-2.3.5/bin/rails:14
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/bin/rails:19:in `load'
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/bin/rails:19
  from /home/jacek/.rvm/gems/ruby-1.8.7-p371/bin/ruby_noexec_wrapper:14

How can I solve this problem? Thank you!

Jacek

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Jacek Wojcik
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    http://stackoverflow.com/questions/5176782/uninitialized-constant-activesupportdependenciesmutex-nameerror – trompa Apr 25 '13 at 08:52

2 Answers2

1
sudo gem update --system

Worked for me :-) For details have a look at this ruby forum

Also the link in the comment Uninitialized constant ActiveSupport::Dependencies::Mutex (NameError) is a good solution source.

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user2316072
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0

The answer is simple...

ruby script/server
instead of rails s

Jacek Wojcik
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