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GitHub User: piratebroadcast
UPDATE: Rails 4 support was just merged into this, so it should work with Rails 4 now.
THIS GEM DOES NOT WORK WITH RAILS 4. Don't even try it. The employee who made it formerly worked for Twitter, then left Twitter, and no one else on the team is interested in supporting it. Recommend the Thumbs Up gem. https://github.com/bouchard/thumbs_up
This fork works for Rails 4. https://github.com/neubloc/cancan/
"Match" has been deprecated in Rails 4 and has to be replaced with "Get".
Does this gem work in Rails 4? Documentation is unclear. I could greenfield a 3.2 app if need be.