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Poniard: a Dependency Injector for Rails

I just open sourced poniard, a dependency injector for Rails. It’s a newer version of code I posted a few weeks back that allows you to write controllers using plain ruby objects:

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module Controller
  class Registration
    def update(response, now_flash, update_form)
      form = update_form

      if form.save
        response.respond_with SuccessfulUpdateResponse, form
      else
        now_flash[:message] = "Could not save registration."
        response.render action: 'edit', ivars: {registration: form}
      end
    end

    SuccessfulUpdateResponse = Struct.new(:form) do
      def html(response, flash, current_event)
        flash[:message] = "Updated details for %s" % form.name
        response.redirect_to :registrations, current_event
      end

      def js(response)
        response.render json: form
      end
    end
  end
end

This makes it possible to test them in isolation, leading to a better appreciation of your dependencies and nicer code.

Check it out!

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