fix for padrino with activerecord concern reload issue

config - boot.rb

Padrino::Reloader.module_eval do

  def reload!
    list = []
    extras = []
    rotation do |file|
      next unless file_changed?(file)
      list << file
    end

    if Module.const_get("ActiveRecord").is_a?(Module)
      list.each do |file|
        unless file.index('concerns/').nil?
          name = Pathname.new(file).basename.to_s.gsub('.rb', '').gsub('.rake', '')
          # puts "basename: #{name.inspect}"
          concern_klass = ActiveSupport::Inflector.constantize(
            ActiveSupport::Inflector.classify(name)
          )
          # logger.info "is concern: #{file}, klass: #{concern_klass}"
          # is a concern, reload all
          ActiveRecord::Base.descendants.each do |klass|
            # logger.info "class: #{klass.inspect}"
            if klass.included_modules.include?(concern_klass)
              find_file = Padrino.root('models/'+klass.name.underscore+".rb")
              logger.devel "model included: #{find_file}"
              if File.exists?(find_file)
                unless list.include?(find_file) || extras.include?(find_file)
                  extras << find_file
                end
                # remove model class due to concern
                remove_constant(klass)
              else
                logger.error "model file missing: #{find_file}"
              end
            end
          end
          # time to remove concern
          remove_constant(concern_klass)
        end
      end
    end

    # logger.info "list: #{list.inspect}, extras: #{extras}"
    list.each do |file|
      reload_special(file) || reload_regular(file)
    end
    extras.each do |file|
      logger.devel "RELOAD MODEL #{file}"
      reload_special(file) || reload_regular(file)
    end
  end

end