Rails 控制台错误输出答案

【问题标题】：Rails Console Error OutputRails 控制台错误输出
【发布时间】：2016-10-07 04:17:28
【问题描述】：

我最近刚刚更新了 Ruby(2.3.1) 和 Rails(5.0.0.1)。现在，当我在 Rails 控制台上收到错误（任何类型的错误）时，后面会出现大约 15-20 行以“from/Users....../.rvm/..etc”开头的行。知道为什么我会收到这么多行此错误输出以及是否正常吗？我该如何解决？其他所有关于 Ruby/Rails 的东西对我来说都很好，所以也许它只是正常的输出。但是，这有点烦人。

每条路径的共同点似乎是“.rvm”。例如：

  2.3.1 :031 > test
ArgumentError: wrong number of arguments (given 0, expected 2..3)
    from (irb):31:in `test'
    from (irb):31
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0.1/lib/rails/commands/console.rb:65:in `start'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0.1/lib/rails/commands/console_helper.rb:9:in `start'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:78:in `console'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `require'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `block in require'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `require'
    from /Users/AlfonsoGiron/workspace/sample_app/bin/rails:9:in `<top (required)>'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `block in load'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:259:in `load_dependency'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1@global/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:287:in `load'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/commands/rails.rb:6:in `call'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/command_wrapper.rb:38:in `call'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:191:in `block in serve'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:161:in `fork'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:161:in `serve'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:131:in `block in run'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:125:in `loop'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application.rb:125:in `run'
    from /Users/AlfonsoGiron/.rvm/gems/ruby-2.3.1/gems/spring-1.7.2/lib/spring/application/boot.rb:19:in `<top (required)>'
    from /Users/AlfonsoGiron/.rvm/rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/AlfonsoGiron/.rvm/rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from -e:1:in `<main>'
2.3.1 :032 >

感谢您的帮助。

【问题讨论】：

标签： ruby-on-rails ruby rails-console

【解决方案1】：

Rails 控制台在后台使用 IRB，因此您必须编辑 IRB 配置文件，通常位于 ~/irbrc，并更改 BACK_TRACE_LIMIT 值：

IRB.conf[:BACK_TRACE_LIMIT]=0

在 Rails 控制台会话期间，您还可以运行：

conf.back_trace_limit = 0

对于 IRB（以及扩展的 Rails 控制台）还有更多的配置选项。通过ruby-doc.org查看它们。

【讨论】：