translation_helper.rb

module TranslationHelper

  def trans(key, options = {})
    root_path = "#{Dir.pwd}/app/views/"
    path = caller.first.sub(root_path, '').split(':')[0]
    extension = '.html.erb'
    segments = path.sub(extension, '').split('/')
    segments.map! do |segment|
      (segment.index('_') == 0) ? segment.sub('_', '') : segment
    end
    translate("#{segments.join('.')}.#{key}", options)
  end

end