In case you're having trouble installing gems...

Posted by chad, February 6, 2007 @ 7:54 pm in Tools

A significant number of Rails developers have reported problems installing gems with the updated RubyGems release. If you’re experiencing a problem that looks anything like this:

$ gem update sqlite3-ruby Updating installed gems… ERROR: While executing gem … (NoMethodError) undefined method `refresh’ for #

…you should remove your local source_cache file. This is the file that locally caches any gem metadata from the gem server to avoid having to re-download it every time you execute a gem command.

To discover the location of this file on your system, run the following command:

$ gem env RubyGems Environment: - VERSION: 0.9.2 (0.9.2) - INSTALLATION DIRECTORY: /usr/local/lib/ruby/gems/1.8 - GEM PATH: - /usr/local/lib/ruby/gems/1.8 - REMOTE SOURCES: -

The source_cache file should be in the path labeled by GEM PATH. Removing that file should clear up any related issues.

This solution is a workaround pending a fix by the RubyGems team.