Best gem questions in June 2011

Bundle / Rake error

Asked on Sat, 11 Jun 2011 by ming yeow ruby rubygems rake gem bundle
13 votes

This is kinda weird - i do not think i changed any code in this particular application (but i was working on another app and performing some gem updates there)

When i started running the rake cron on this application, i got this error message. Production is fine.

You have already activated rake 0.9.2, but your Gemfile requires rake 0.8.7. Consider using bundle exec.

It works when I do this, but i need to fix this properly. 

bundle exec rake cron

I saw a discussion here, and i figure it has to do with bundle using the wrong version. What is the best way to fix this?

http://community.engineyard.com/discussions/problems/1391-you-have-already-activated-rake-083-but-your-gemfile-requires-rake-087-consider-using-bundle-exec

Answered by matt

Using bundle exec rake cron is the right way to do this.

Basically what's happening is that you've updated rake to 0.9.2 which now conflicts with the version specified in your Gemfile. Previously the latest version of rake you had matched the version in your Gemfile, so you didn't get any warning when simply using rake cron.

Yehuda Katz (one of the original Bundler developers) explains it all in this blog post: http://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/.

uninitialized constant Rake::DSL in Ruby Gem

Asked on Tue, 07 Jun 2011 by Ivanoats ruby rubygems rake gem
10 votes

I have been working on updating my gem (whm_xml at https://github.com/ivanoats/whm_xml_api_ruby ) to make it work with ruby 1.9.2, latest rubygems, latest bundler, latest rdoc, latest rake. It works fine in 1.8.7 but has the "uninitialized constant Rake::DSL" error only in 1.9.2 . I thought that rake 0.9.2 fixed that but maybe not? I have read a lot on StackOverflow but am still stuck. Any ideas on where to look?

ivan:~/Development/ruby/whm_xml_api_ruby [git:master+]  → bundle exec rake -T
(in /Users/ivan/Development/ruby/whm_xml_api_ruby)
rake aborted!
uninitialized constant Rake::DSL
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2482:in `const_missing'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/tasklib.rb:8:in `<class:TaskLib>'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/tasklib.rb:6:in `<module:Rake>'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/lib/rake/tasklib.rb:3:in `<top (required)>'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rdoc-3.6.1/lib/rdoc/task.rb:37:in `require'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rdoc-3.6.1/lib/rdoc/task.rb:37:in `<top (required)>'
/Users/ivan/Development/ruby/whm_xml_api_ruby/Rakefile:3:in `require'
/Users/ivan/Development/ruby/whm_xml_api_ruby/Rakefile:3:in `<top (required)>'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2373:in `load'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2058:in    `standard_exception_handling'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
/Users/ivan/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/rake.rb:1991:in `run'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/gems/rake-0.9.2/bin/rake:32:in `<top (required)>'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/bin/rake:19:in `load'
/Users/ivan/.rvm/gems/ruby-1.9.2-p180/bin/rake:19:in `<main>'

Answered by Caley Woods

This SO Question might help you out. The suggestion there is to add require 'rake/dsl_definition' above require 'rake' in your Rakefile.