Question

On Windows 7 with Ruby 1.9.2-p180 and Rails 3.0.5 installed, if I

rails new trytry
cd trytry
bundle install

it will show

C:\ror\trytry>bundle install
c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/ui.rb:46:in `<class:UI>': uninitialized constant Gem::SilentUI (NameError)
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/ui.rb:2:in `<module:Bundler>'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/ui.rb:1:in `<top (required)>'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/cli.rb:17:in `initialize'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/vendor/thor.rb:246:in `new'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/vendor/thor.rb:246:in `dispatch'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/lib/bundler/vendor/thor/base.rb:389:in `start'
        from c:/ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.0/bin/bundle:13:in `<top (required)>'
        from c:/Ruby192/bin/bundle:19:in `load'
        from c:/Ruby192/bin/bundle:19:in `<main>

only after a

gem install bundler

or probably a

gem update bundler

then the bundle install will work. So looks like the Rails 3.0.5 needs a newer bundler which was not listed correctly in the dependency? Otherwise when I gem install rails for 3.0.5, it should have updated bundler as well, is that right?

Answer 1

You’ve got an older version of Bundler installed, you will need to run gem install bundler to update it to the latest version.

Rails depends on a version of Bundler matching the dependency version of ~> 1.0. If you’ve got a version of Bundler installed, such as 1.0.0, the process of gem install rails sees this dependency is matched already and so won’t update Bundler. Therefore, you need to run gem install bundler to update it to the latest version.