ruby-on-rails - Ruby on Rails 错误:Uglifier::错误:意外的标记:运算符(<)

Question

每当我在命令行中运行 rake assets:precompile RAILS_ENV=production 时，我都会收到此错误，这会阻止我预编译我的 Assets 。

下面是命令行中显示的完整错误:

rake aborted!
Uglifier::Error: Unexpected token: operator (<)
/usr/local/rvm/gems/ruby-2.3.4/gems/uglifier-4.1.4/lib/uglifier.rb:234:in parse_result'
/usr/local/rvm/gems/ruby-2.3.4/gems/uglifier-4.1.4/lib/uglifier.rb:216:in run_uglifyjs'
/usr/local/rvm/gems/ruby-2.3.4/gems/uglifier-4.1.4/lib/uglifier.rb:168:in compile'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/compressing.rb:65:in block in js_compressor='
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy_proc_processor.rb:31:in call'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:75:in call_processor'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:57:in block in call_processors'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in reverse_each'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/processor_utils.rb:56:in call_processors'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/loader.rb:134:in load_from_unloaded'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/loader.rb:60:in block in load'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/loader.rb:317:in fetch_asset_from_dependency_cache'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/loader.rb:44:in load'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:20:in block in initialize'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/cached_environment.rb:47:in load'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/base.rb:66:in find_asset'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/base.rb:73:in find_all_linked_assets'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:142:in block in find'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:114:in block (2 levels) in logical_paths'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:228:in block in stat_tree'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:212:in block in stat_directory'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in each'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:209:in stat_directory'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/path_utils.rb:227:in stat_tree'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in each'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:105:in block in logical_paths'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in each'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/legacy.rb:104:in logical_paths'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:140:in find'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/sprockets/manifest.rb:185:in compile'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:68:in block (3 levels) in define'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-3.7.1/lib/rake/sprocketstask.rb:147:in with_logger'
/usr/local/rvm/gems/ruby-2.3.4/gems/sprockets-rails-3.2.1/lib/sprockets/rails/task.rb:67:in block (2 levels) in define'
/usr/local/rvm/gems/ruby-2.3.4/gems/rake-12.3.0/exe/rake:27:in <top (required)>'
/usr/local/rvm/gems/ruby-2.3.4/bin/ruby_executable_hooks:15:in eval'
/usr/local/rvm/gems/ruby-2.3.4/bin/ruby_executable_hooks:15:in <main>'
Tasks: TOP => assets:precompile
(See full trace by running task with --trace)

我究竟需要做什么来修复这个错误？

Answer 1

我遇到了同样的错误。有趣的是，它是由 direct_upload.js 触发的Rails 本身为 ActiveStorage 推荐的文件!我在这里找到了解决方案:https://github.com/lautis/uglifier/issues/127

尝试替换

config.assets.js_compressor = :uglifier

与

config.assets.js_compressor = Uglifier.new(harmony: true)

在 config/environments/production.rb