cannot require ruby wordnet gem

Question

I installed ruby gem 'wordnet', a gem on English linguistic. After I installed it (wordnet 0.0.5), when I tried to require it using irb, I got the following errors:

>> require 'wordnet'
LoadError: no such file to load -- bdb
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:29:in `gem_original_require'
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:29:in `require'
    from /Library/Ruby/Gems/1.8/gems/wordnet-0.0.5/lib/wordnet/lexicon.rb:34
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:29:in `gem_original_require'
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:29:in `require'
    from /Library/Ruby/Gems/1.8/gems/wordnet-0.0.5/lib/wordnet.rb:83
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:32:in `gem_original_require'
    from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:32:in `require'
    from (irb):2
    from /Library/Ruby/Site/1.8/rubygems/specification.rb:638

how to solve this and make it work?

Answer 1

Looks like the wordnet gem is requiring the Berkley DB library. Try to do a

gem install bdb

and then try again.