[英][console in rails]. uninitialized constant Class
when i run a method in terminal of rails.当我在 rails 终端运行一个方法时。 first time, it working :第一次,它工作:
Spree::Campaign.first
Campaign Load (0.4ms) SELECT `campaigns`.* FROM `campaigns` ORDER BY `campaigns`.`id` ASC LIMIT 1
=> #<Campaign id: 1, name: "campaign 1", user_id: 1, created_at: "2015-10-27 06:48:01", updated_at: "2015-10-29 04:22:03", description: nil, active: true>
but when i try run code above again但是当我再次尝试运行上面的代码时
Spree::Campaign.first
NameError: uninitialized constant Spree::Campaign
from (irb):2
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/railties-4.1.6/lib/rails/commands/console.rb:90:in `start'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/railties-4.1.6/lib/rails/commands/console.rb:9:in `start'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:69:in `console'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/railties-4.1.6/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/railties-4.1.6/lib/rails/commands.rb:17:in `<top (required)>'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
from /home/kop/.rvm/gems/ruby-2.1.4@rails3213/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
from /home/kop/rails/donghoxteen/bin/rails:8:in `<top (required)>'
from /home/kop/.rvm/rubies/ruby-2.1.4/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/kop/.rvm/rubies/ruby-2.1.4/lib/ruby/site_ruby/2.1.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from -e:1:in `<main>'
Why?为什么? and how to fix this error??以及如何解决这个错误?
The errors you are getting seem to be intermittent.您遇到的错误似乎是间歇性的。 In your question text, the error is uninitialized constant Spree::Campaign
, whereas in your question title, the error is uninitialized constant Class
.在您的问题文本中,错误是uninitialized constant Spree::Campaign
,而在您的问题标题中,错误是uninitialized constant Class
。
This points to there being something fundamentally wrong with your Ruby installation.这表明您的 Ruby 安装存在根本性的错误。 Class
is a core Ruby class, and the Class
constant should always be there. Class
是 Ruby 的核心类,并且Class
常量应该始终存在。 It's hard to diagnose with just the information you have given, but it appears that constant lookup is broken in your Ruby installation.仅凭您提供的信息很难进行诊断,但是在您的 Ruby 安装中,持续查找似乎被破坏了。
I recommend re-installing Ruby.我建议重新安装Ruby。
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