Not loading in Sinatra

[HoneyryderChuck]

Hi,

I'm trying to bundle this gem with data mapper in my sinatra app, but somehow it cannot be loaded. I have them defined like this in my gemfile:

gem "data_mapper",              '1.2.0'
gem "dm-mysql-adapter",         '1.2.0'
gem "dm-polymorphic",           '0.10.2'

and I'm getting the following backtrace:

/Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/dm-polymorphic-0.10.2/lib/dm-polymorphic.rb:46:in `': undefined method `/' for # (NoMethodError)
    from /Users/tiagocardoso/Projects/rightclearing-api/app.rb:5:in `require'
    from /Users/tiagocardoso/Projects/rightclearing-api/app.rb:5:in `'
    from /Users/tiagocardoso/Projects/rightclearing-api/spec/spec_helper.rb:3:in `require'
    from /Users/tiagocardoso/Projects/rightclearing-api/spec/spec_helper.rb:3:in `'
    from /Users/tiagocardoso/Projects/rightclearing-api/spec/models/authorization_spec.rb:2:in `require'
    from /Users/tiagocardoso/Projects/rightclearing-api/spec/models/authorization_spec.rb:2:in `'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `block in load_spec_files'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `map'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/configuration.rb:780:in `load_spec_files'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/command_line.rb:22:in `run'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:69:in `run'
    from /Users/tiagocardoso/Projects/rightclearing-api/bundled_gems/ruby/1.9.1/gems/rspec-core-2.11.1/lib/rspec/core/runner.rb:8:in `block in autorun'

Should this work under Sinatra?

[HoneyryderChuck]

Now that I have looked further into this, it looks like ur gem is outdated concerning the data mapper version. Is it so?