What is the Ruby on Rails assets directory and how do I get it in my old app?

I'm new to RoR and started making a project recently. The project has public/stylesheets and public/javascripts for my CSS and JS.

For testing purposes, I created another RoR app called sample_app to play around with. I noticed sample_app has an app/assets directory where you can use CoffeeScript开发者_运维问答 and SCSS! That's really cool!

However, my primary app doesn't have that stuff.

Can someone explain what is going on here, and how do I upgrade my first app to use CoffeeScript?

Also, does it matter that my first app has a model called Asset? I could rename it if necessary... heck, I could just create a new app if necessary and move all the old code over manually. It'd be worth it to use CoffeeScript instead of JS.

Thanks!

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Rails 3.1 is currently in beta (technically, release candidate 3.1.0.rc1).

Take a look at the generated files in sample_app. Particularly config/*, config/initializers/*. Copy any differences to your existing app.

• Replace the gem 'rails' line with gem 'rails', '3.1.0.rc1' in your existing app's Gemfile.
• Copy app/assets to your existing app
• Run bundle update
• rails generate controller some_test_controller will give you an idea of where Rails is putting/using the new app/assets.
• Move things from public/javascripts and public/stylesheets to app/assets/**/*

Keep in mind, rails-3.1.0.rc1 should be fairly solid, but it is a beta release. Make sure you've got stuff committed / backed up before starting