在开发模式下，我的js不再在我的rails应用上编译：
这是控制台错误：
GET http://localhost:3000/packs/application-6b30daaa0a66e7f7c4fd.js 404 (Not Found)
这是我的日志：
Started GET "/packs/application-6b30daaa0a66e7f7c4fd.js" for 127.0.0.1 at 2018-12-18 21:40:35 +0100
ActionController::RoutingError (No route matches [GET] "/packs/application-6b30daaa0a66e7f7c4fd.js"):
actionpack (5.1.5) lib/action_dispatch/middleware/debug_exceptions.rb:63:in `call'
web-console (3.5.1) lib/web_console/middleware.rb:135:in `call_app'
web-console (3.5.1) lib/web_console/middleware.rb:28:in `block in call'
web-console (3.5.1) lib/web_console/middleware.rb:18:in `catch'
web-console (3.5.1) lib/web_console/middleware.rb:18:in `call'
actionpack (5.1.5) lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
railties (5.1.5) lib/rails/rack/logger.rb:36:in `call_app'
railties (5.1.5) lib/rails/rack/logger.rb:24:in `block in call'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `block in tagged'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (5.1.5) lib/active_support/tagged_logging.rb:69:in `tagged'
railties (5.1.5) lib/rails/rack/logger.rb:24:in `call'
sprockets-rails (3.2.1) lib/sprockets/rails/quiet_assets.rb:13:in …