Why is my rake call causing an 'undefined method `source_index`' error?

Question

I am trying to run bundle exec rake db:migrate then encountered the following error.

bundle exec rake db:migrate --trace
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
undefined method `source_index' for Gem:Module
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.17/lib/rails/gem_dependency.rb:21:in `add_frozen_gem_path'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.17/lib/initializer.rb:298:in `add_gem_load_paths'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.17/lib/initializer.rb:132:in `process'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.17/lib/initializer.rb:113:in `run'
C:/Program Files/chiliproject-3.7.0/config/environment.rb:42:in `<top (required)>'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/activesupport-2.3.17/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/activesupport-2.3.17/lib/active_support/dependencies.rb:182:in `block in require'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/activesupport-2.3.17/lib/active_support/dependencies.rb:547:in `new_constants_in'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/activesupport-2.3.17/lib/active_support/dependencies.rb:182:in `require'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.17/lib/tasks/misc.rake:4:in `block in <top (required)>'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `call'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:228:in `block in execute'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `each'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:223:in `execute'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:166:in `block in invoke_with_call_chain'
C:/Ruby193/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:187:in `block in invoke_prerequisites'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:185:in `each'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:185:in `invoke_prerequisites'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:165:in `block in invoke_with_call_chain'
C:/Ruby193/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:159:in `invoke_with_call_chain'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/task.rb:152:in `invoke'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:143:in `invoke_task'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `block (2 levels) in top_level'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `each'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:101:in `block in top_level'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:110:in `run_with_threads'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:95:in `top_level'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:73:in `block in run'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:160:in `standard_exception_handling'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/lib/rake/application.rb:70:in `run'
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rake-10.0.3/bin/rake:33:in `<top (required)>'
C:/Ruby193/bin/rake:23:in `load'
C:/Ruby193/bin/rake:23:in `<main>'
Tasks: TOP => db:migrate => environment

This is the part encountering the error:

    def self.add_frozen_gem_path
      @@paths_loaded ||= begin
        source_index = Rails::VendorGemSourceIndex.new(Gem.source_index)
        Gem.clear_paths
        Gem.source_index = source_index
        # loaded before us - we can't change them, so mark them
        Gem.loaded_specs.each do |name, spec|
          @@framework_gems[name] = spec
        end
        true
      end
    end

I know this seems to be basic, but I have been searching over the internet and can't seem to find the answer.

Answer 1

the problem is perfectly solved undefined method `source_index' for Gem:Module (NoMethodError) with only simple row

gem update --system 1.8.25

Answer 2

Ok Ive been messing with this all day and finally got things working for me with the following:

1. Bring RVM up-to-date

   rvm get head

2. Change ruby version to 1.9.3

   • Update in Gemfile
   • Update .rvmrc file

3. Update Rails to latest 2.3 version

   • Update in Gemfile
   • Update in environments.rb

Did all that then ran

bundle exec rake db:migrate

There is some wierd conflict happening in Rails 2.3 with the latest ruby gems and an unknown x factor, which could include an issue in ruby 1.9.1 and 1.9.2?