Ruby on rails Rails控制台错误：未定义的方法'each'；对于nil:NilClass（nomethoderor）

任何试图在我的rails应用程序的根目录中运行rails控制台的尝试都会产生以下错误：

nil:NilClass（NoMethodError）的未定义方法“each”

完整堆栈跟踪：

 /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/railtie.rb:245:in `each_registered_block': undefined method `each' for nil:NilClass (NoMethodError)
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/railtie.rb:224:in `run_console_blocks'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/application.rb:461:in `block in run_console_blocks'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine/railties.rb:13:in `each'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine/railties.rb:13:in `each'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/application.rb:461:in `run_console_blocks'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/engine.rb:442:in `load_console'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console.rb:34:in `initialize'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console_helper.rb:9:in `new'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/console_helper.rb:9:in `start'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/commands_tasks.rb:78:in `console'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/command.rb:20:in `run'
  from /Users/gnerkus/.rvm/gems/ruby-2.2.3@rails-experiments/gems/railties-5.0.0.beta1.1/lib/rails/commands.rb:19:in `<top (required)>'
  from bin/rails:4:in `require'
  from bin/rails:4:in `<main>'

这反过来又来自此块：

def run_console_blocks(app) #:nodoc:
  each_registered_block(:console) { |block| block.call(app) }
end

我卸载了

spring

gem并安装了

rubocp

gem。否则，我的

Gemfile

包含默认gem

我的Ruby版本是

2.2.3

，它高于为Rails 5推荐的

2.2.2

版本

Ruby版本：

2.2.3p173

Rails版本：

5.0.0.beta1.1

---

RVM版本：

1.26.11

错误是由此处引用的

web控制台

gem引起的：<代码>web控制台在报告时的版本为

3.1.0

。

3.0.0

版本的

web控制台

在执行

rails控制台

时似乎没有产生任何错误

---

由于问题已在

3.1.1

版本中解决，您需要确保您的

web console

版本为

3.1.1

及更高版本。

您需要安装spring gem

gem install spring  --pre

---

gem-install-spring

适合我

我的问题是：

/usr/local/bin/NMONMerge.rb:209:in `block in <main>': undefined method `each' for nil:NilClass (NoMethodError)
from /usr/local/bin/NMONMerge.rb:191:in `each'
from /usr/local/bin/NMONMerge.rb:191:in `<main>'

/usr/local/bin/NMONMerge.rb:209:in'block-in'：nil:NilClass（NoMethodError）的未定义方法'each'
from/usr/local/bin/NMONMerge.rb:191:在'each'中
from/usr/local/bin/NMONMerge.rb:191:in`'

你能发布完整的堆栈跟踪吗？我会的。我必须等待两天才能完成任务。+1我在使用Rails 4.2.5.1的

WebConsole3.1.0

时遇到了同样的问题，链接的Github线程帮助了我。降级回3.0使控制台重新工作。Rails 4.2.5.1也有同样的问题。但它也可以通过

web控制台的更新版本
3.1.1
进行修复。
/usr/local/bin/NMONMerge.rb:209:in `block in <main>': undefined method `each' for nil:NilClass (NoMethodError)
from /usr/local/bin/NMONMerge.rb:191:in `each'
from /usr/local/bin/NMONMerge.rb:191:in `<main>'