我也想用，每次编译好麻烦，并且不知道为什末，在 development 环境下，也需要编译才管用

config.assets.enabled = false

http://guides.rubyonrails.org/asset_pipeline.html

In Rails 3.1, the asset pipeline is enabled by default. It can be disabled in config/application.rb by putting this line inside the application class definition:

config.assets.enabled = false

You can also disable the asset pipeline while creating a new application by passing the —skip-sprockets option.

rails new appname --skip-sprockets

You should use the defaults for all new applications unless you have a specific reason to avoid the asset pipeline 这应该是答案吧。来自 http://guides.rubyonrails.org/asset_pipeline.html