Rails 服务器因 uglifier gem 而失败答案

【问题标题】：Rails server fails because of uglifier gemRails 服务器因 uglifier gem 而失败
【发布时间】：2016-05-09 23:50:46
【问题描述】：

当我尝试加载 Rails 服务器时，我收到此错误：

/home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
from /home/jared/.rvm/gems/ruby-head/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
from /home/jared/thirteenthagecharbuilder/config/application.rb:7:in `<top (required)>'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:78:in `require'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:78:in `block in server'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:75:in `server'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /home/jared/.rvm/gems/ruby-head/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in `<top (required)>'
from /home/jared/thirteenthagecharbuilder/bin/rails:9:in `require'
from /home/jared/thirteenthagecharbuilder/bin/rails:9:in `<top (required)>'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/client/rails.rb:28:in `load'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/client/rails.rb:28:in `call'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/client/command.rb:7:in `call'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/client.rb:28:in `run'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/bin/spring:49:in `<top (required)>'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/binstub.rb:11:in `load'
from /home/jared/.rvm/gems/ruby-head/gems/spring-1.6.2/lib/spring/binstub.rb:11:in `<top (required)>'
from /home/jared/thirteenthagecharbuilder/bin/spring:13:in `require'
from /home/jared/thirteenthagecharbuilder/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'

我已经搜索了很多这个问题，并且我在 stackoverflow 上发现的每个答案都说“安装 nodejs”，我已经这样做了，但这并没有为我解决任何问题。

jared@machine:~$ nodejs -v
v0.10.29
jared@machine:~$ node -v
v4.4.4
jared@machine:~$ npm --version
2.15.1
jared@machine:~$ echo $PATH
/home/jared/.rvm/gems/ruby-head/bin:/home/jared/.rvm/gems/ruby-head@global/bin:/home/jared/.rvm/rubies/ruby-head/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/jared/.rvm/bin:/home/jared/.rvm/bin:/home/jared/.rvm/bin:/usr/local/nodejs/bin

我还在我的 gemfile 中添加了 therubyracer gem。我捆绑安装。在我的绳索的尽头，因为，老实说，我从任何人那里看到的关于这个问题的唯一建议是安装 nodejs，并且通常基于此线程被标记为已解决，我无法尝试更多的事情。

在 debian 8 (jessie) 64 位上运行 rails 4.2.5.1，使用 rvm，安装 ruby 2.4.0。

编辑：由于似乎没有人想解决这个问题，这里有一些来自我知道也无法解决问题的 rails 开发人员的更多信息：

添加

$stderr.puts e.inspect

就在第 80 行的正上方：

#<TypeError: wrong argument type Class (expected Module)>

然后搜索 uglifier 以查看某个类是否在项目中不应该出现的某个地方被引用：

jared@machine:~/thirteenthagecharbuilder$ grep -r uglifier /home/jared/thirteenthagecharbuilder/
/home/jared/thirteenthagecharbuilder/Gemfile.lock:    uglifier (3.0.0)
/home/jared/thirteenthagecharbuilder/Gemfile.lock:  uglifier (>= 2.7.1)
/home/jared/thirteenthagecharbuilder/Gemfile:gem 'uglifier', '>= 2.7.1'
/home/jared/thirteenthagecharbuilder/config/environments/production.rb:  config.assets.js_compressor = :uglifier

最后（目前），config/application.rb 的第 7 行说

Bundler.require(*Rails.groups)

【问题讨论】：

您实际使用的是哪个版本的 Ruby？不是 2.4.0；没有这样的事。我能想到的最好的方法是升级到 Ruby 2.3.1（我假设你实际上是在 2.3.0 上）和 bundler 1.12.2 看看是否有帮助。我最近在两个旧版本中都遇到了错误，尽管我不知道它们与您的问题有关。

标签： javascript ruby-on-rails ruby ruby-on-rails-4 uglifier

【解决方案1】：

所以，我对红宝石进行了核弹，长话短说。我使用 rvm，因此删除它非常容易，而且我还没有在项目上完成太多工作。所以 rvm 和相关的宝石消失了。我重新安装了 rvm，但这次也使用了安装 rails 的选项：

https://rvm.io/rvm/install

\curl -sSL https://get.rvm.io | bash -s stable --rails

这让我启动并运行。所以我想我最好的建议是在使用 rvm 时使用 rails 标志。

【讨论】：