gem file
group :assets do
gem 'sass-rails', '~> 3.2.3'
gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
application.js
//= require jquery
//= require jquery_ujs
//= require_tree .
浏览器查看,application.js 为空
rake assets:precompile 后 public/assets下面的application.js也为空
哪里出现问题了?