NoMethodError：未定義的方法`[]'爲零：NilClass在推向Heroku時

Question

Rails noob here。

當推送到Heroku（NoMethodError：未定義的方法'[]'爲nil：NilClass）時，我遇到了一個問題。我甚至不知道我應該從哪裏開始尋找解決這個問題。

remote: -----> Preparing app for Rails asset pipeline 
remote:  Running: rake assets:precompile 
remote:  I, [2015-10-04T23:27:47.570225 #397] INFO -- : Writing /tmp/build_1a2df3ea1a8121d7fba6ab542c59ba85/public/assets/application-7fbbda11565ec9a0d53aaeb338357988655d4d81476f99312f8a66772c63bea9.js 
remote:  rake aborted! 
remote:  NoMethodError: undefined method `[]' for nil:NilClass 
remote:  /tmp/build_1a2df3ea1a8121d7fba6ab542c59ba85/vendor/bundle/ruby/2.2.0/gems/sprockets-3.3.5/lib/sprockets/sass_processor.rb:266:in `sprockets_context' 
remote:   

Answer 1

我能夠通過將我的application.css文件重命名爲application.css.scss來解決此問題。