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url: http://blog.plataformatec.com.br/2012/01/my-five-favorite-hidden-features-in-rails-3-2/
Some tips and tricks specific to the Ruby on Rails 3.2 release. Code samples demonstrating why they are improvements and how to use them. Content_tag_for , div_tag_for, improvements to syntax in migration generator command, better exception handling, custom partial paths, and filter chain logging is back.