Javascript不能在Heroku上工作但在本地工作，我该如何解决？

Question

I was able to push my code and deploy to Heroku, beforehand it was working locally on Cloud9. I hooked up the buildpacks for ruby on rails and add a postgres db to avoid deploy errors. When I looked at the deployed code, the javascript for my pages were disabled.

I have tried getting rid of the //= tree required in my application.rb file, removing the gemlock file, installing a sass alternative since the current one is depreciated, heroku asset clean and restart. And ran rake assets:precompile for both local and heroku

This is after heroku run rake assets:precompile

NoMethodError: undefined method `[]' for nil:NilClass
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_processor.rb:278:in `sprockets_context'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_processor.rb:124:in `asset_path'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_processor.rb:137:in `asset_url'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_processor.rb:209:in `font_url'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:151:in `block in _perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:108:in `block in with_function'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:108:in `with_function'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:149:in `_perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/node.rb:50:in `perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/list_literal.rb:75:in `block in _perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/list_literal.rb:75:in `map'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/list_literal.rb:75:in `_perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/script/tree/node.rb:50:in `perform'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:398:in `visit_prop'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:513:in `block (2 levels) in visit_directive'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:513:in `map'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:513:in `block in visit_directive'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:512:in `visit_directive'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `map'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:167:in `block in visit_children'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:166:in `visit_children'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:186:in `visit_root'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:157:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:10:in `visit'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/root_node.rb:36:in `css_tree'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/tree/root_node.rb:20:in `render'
/app/vendor/bundle/ruby/2.5.0/gems/sass-3.7.4/lib/sass/engine.rb:290:in `render'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_compressor.rb:48:in `call'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/sass_compressor.rb:28:in `call'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:75:in `call_processor'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:57:in `block in call_processors'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `reverse_each'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/processor_utils.rb:56:in `call_processors'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:134:in `load_from_unloaded'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:60:in `block in load'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:317:in `fetch_asset_from_dependency_cache'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/loader.rb:44:in `load'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:20:in `block in initialize'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/cached_environment.rb:47:in `load'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/base.rb:66:in `find_asset'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/base.rb:73:in `find_all_linked_assets'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:134:in `block in find'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:133:in `each'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:133:in `find'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/sprockets/manifest.rb:186:in `compile'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:68:in `block (3 levels) in define'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-3.7.2/lib/rake/sprocketstask.rb:147:in `with_logger'
/app/vendor/bundle/ruby/2.5.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:67:in `block (2 levels) in define'
/app/vendor/bundle/ruby/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:74:in `kernel_load'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli/exec.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:360:in `exec'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor.rb:369:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:20:in `dispatch'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/vendor/thor/lib/thor/base.rb:444:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/cli.rb:10:in `start'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:30:in `block in <top (required)>'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/lib/bundler/friendly_errors.rb:121:in `with_friendly_errors'
/app/vendor/bundle/ruby/2.5.0/gems/bundler-1.15.2/exe/bundle:22:in `<top (required)>'
/app/bin/bundle:3:in `load'
/app/bin/bundle:3:in `<main>'
Tasks: TOP => assets:precompile

I was looking to have a fully functional site, but the push to heroku seemed to cause the application to not have any javascript functionality, when it should be. Please help, sorry for the annoying posts but I really want to get this down.

Answer 1

If you are using rails-bootstrap gem, there is a file named bootstrap.coffee.js. You can try removing it and see if it works.

Also, You can also try pushing it in this manner(precompiling before pushing it to heroku):

rake assets:precompile RAILS_ENV=production
git add .
git commit -a -m "JS"
git push heroku master

Other than that if none of it is working, from config/environments/production.rb:

config.assets.compile = true 

The last approach is not advised.

Answer 2

I found that I was missing the correct files in my assets.rb and application.js files. After that I precompiled and pushed as mentioned above and it worked! Thank you guys for the help!