05 Apr '13, 2pm

@cosmo__ ruby '1.9.3' とか。

Like gems, developers can setup a dependency on Ruby. This makes your app fail faster in case you depend on specific features in a Ruby VM. This way, the Ruby VM on your deployment server will match your local one. You can do this by using the ruby directive in the Gemfile : ruby ' RUBY_VERSION' , : engine => ' ENGINE' , : engine_version => ' ENGINE_VERSION' If you wanted to use JRuby 1.6.7 using Ruby 1.9.3, you would simply do the following: ruby ' 1.9.3' , : engine => ' jruby' , : engine_version => ' 1.6.7' Bundler will make checks against the current running Ruby VM to make sure it matches what is specified in the Gemfile . If things don't match, Bundler will raise an Exception explaining what doesn't match. Your Ruby version is 1.8.7, but your Gemfile specified 1.9.3 Both :engine and :engine_version are optional. When these options are omitted, this means the app is co...

Full article: http://gembundler.com/v1.3/gemfile_ruby.html

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