gistfile1.rb

## Define an application

class Application < Rails::Application
end

Application.new do 
  config.assets = "something"

  # This doesn't work
  initializers do
    puts "Doing something here"
  end

  # This works correctly.
  Rails::Application::initializers do
    puts "Doing something there"
  end
end


## Now initialize the application

module Rails
  class Application
    def initialize(&block)
      # ... some stuff here ...

      class_eval(&block)
    end
  end
end