我是Heroku的新手，由于与Uglifier相关的错误，我无法部署我的Rails 5应用程序的更新版本。
我目前在Heroku上部署了我的应用程序的一个版本，但是我的JS文件都没有加载在那里。它们可以在localhost：3000上加载并正常运行。
我认为这是与Uglifier有关的问题。在阅读了关于SO的另一个人的类似问题之后，我尝试了降级Uglifier gem的解决方案。我的Gemfile先前指定了“> = 1.3.0”，因此Heroku自动安装了4.1.20。因此，我将Gemfile更改为：gem'uglifier'，'〜> 3.0.4'）。
不过，当我现在按下Heroku时，会收到以下错误消息：
...
remote: Installing uglifier 3.0.4
remote: Bundle complete! 24 Gemfile dependencies, 77 gems now installed.
remote: Gems in the groups development and test were not installed.
remote: Bundled gems are installed into ./vendor/bundle.
remote: Bundle completed (3.33s)
remote: Cleaning up the bundler cache.
remote: Warning: the running version of Bundler (1.15.2) is older than the version that created the lockfile (1.16.2). We suggest you upgrade to the latest version of Bundler by running `gem install bundler`.
remote: Removing uglifier (4.1.20)
remote: The latest bundler is 2.0.1, but you are currently running 1.15.2.
remote: To update, run `gem install bundler`
remote: -----> Installing node-v10.14.1-linux-x64
remote: -----> Detecting rake tasks
remote: -----> Preparing app for Rails asset pipeline
remote: Running: rake assets:precompile
remote: rake aborted!
remote: ArgumentError: Invalid option: harmony
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/uglifier-3.0.4/lib/uglifier.rb:129:in `block in initialize'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/uglifier-3.0.4/lib/uglifier.rb:128:in `each'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/uglifier-3.0.4/lib/uglifier.rb:128:in `initialize'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/config/environments/production.rb:26:in `new'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/config/environments/production.rb:26:in `block in <main>
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/railtie.rb:216:in `instance_eval'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/railtie.rb:216:in `configure'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/config/environments/production.rb:1:in `<main>'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/engine.rb:602:in `block (2 levels) in <class:Engine>'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/engine.rb:601:in `each'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/engine.rb:601:in `block in <class:Engine>'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `instance_exec'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:32:in `run'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:61:in `block in run_initializers'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:50:in `each'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:50:in `tsort_each_child'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/initializable.rb:60:in `run_initializers'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/application.rb:361:in `initialize!'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/config/environment.rb:5:in `<main>'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:21:in `block in require_with_bootsnap_lfi'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/loaded_features_index.rb:65:in `register'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:20:in `require_with_bootsnap_lfi'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:29:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `block in require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:257:in `load_dependency'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/activesupport-5.2.2/lib/active_support/dependencies.rb:291:in `require'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/application.rb:337:in `require_environment!'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/railties-5.2.2/lib/rails/application.rb:520:in `block in run_tasks_blocks'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:62:in `block (2 levels) in define'
remote: /tmp/build_5ce011f911fe1c351bbce1885a611ecb/vendor/bundle/ruby/2.5.0/gems/rake-12.3.2/exe/rake:27:in `<top (required)>'
remote: Tasks: TOP => environment
remote: (See full trace by running task with --trace)
remote:
remote: !
remote: ! Precompiling assets failed.
remote: !
remote: ! Push rejected, failed to compile Ruby app.
remote:
remote: ! Push failed
production.rb文件的第26行是这样的：
config.assets.js_compressor = Uglifier.new（harmony：true）
关于我在做什么错的任何想法？和谐与该版本的Uglifier不兼容吗？
答案 0 :(得分：1)
终于成功了！我必须进入我的application.js文件并删除'/ = require jquery-ujs'。该文件已经包含“ / = require rails-ujs”，因此不需要jquery-ujs（就我而言，这完全阻止了我的应用正常运行！）。
我的application.js文件：
//= require jquery
//= require rails-ujs
//= require activestorage
//= require_tree .
说实话，我在控制台中收到一条警告，提示您不需要同时使用这两项。但是，由于我在本地未遇到任何与JS / jQuery相关的问题，因此我忽略了该警告。瞧，这是阻止我的JS文件正确加载到Heroku上的罪魁祸首。故事的寓意：不要忽略那些警告。