Question

I’ve got an engine that utilizes the savon gem. When I run the dummy application in /test inside the engine, it all works out just fine, but when I try to mount and run it as an engine inside my application, I get the error:

`require': no such file to load -- savon (LoadError)

I used to include it by adding require "savon" to the top of the model, soap_model.rb that uses it. According to this post I shouldn’t add it to the model, but the environment.rb. It did’t seem like the environment.rb was run while starting the server, as it just produced a new error

uninitialized constant EngineName::SOAP::Savon

So I added it to an initializer, which yields the same error when trying to start the server with rails s.

Environment:

Mac OS 10.7.3
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.3.0]
Rails 3.1.4
savon (0.9.9)

Note: I have of course made sure that bundle install runs correctly, and restarted the server.

Answer 1

The gem was included in the engines Gemfile, but not added as a dependency in the gemspec, thus it was not included when bundle install was run in the main app.

Adding this to enginename.gemspec

s.add_dependency "savon"

made everything work.

The reason it worked in the dummy app, is that it shares Gemfile with the engine.