RoR && "coming soon" page

I am looking for a simple way to implement simple "coming soon" (pre-launch) page for my project on Ruby on Rails. User should be able to leave an email in order to be notified when project is launched.

Is there such a plugin\gem? Or I should 开发者_如何学Pythondo it myself...

Launching Soon is a rails plugin. It also integrates with MailChimp or Campaign monitor.

I hope people don't interpret this as shameless self-promotion but I've just implemented exactly that functionality in a web service. It's called ComingSoonApp http://comingsoonapp.com. Besides capturing the email addresses, it also embeds your google analytics code so that you can see how traffic is building to your site.

Here is a Ruby on Rails tutorial showing how to create a “beta launching soon” application for a startup prelaunch site with a signup page. You can clone the rails-prelaunch-signup repository for the complete example application on github. It uses Devise gem for authentication and user management, and you will learn a lot from following the tutorial.

Similar to Coming Soon like the other answer, I use a product (I don't work for them) called Prefinery. http://www.prefinery.com/. It lets you put up a form on your site (you just include some javascript) and beta testers can sign up.