main:Object (NameError) 的局部变量或方法“config”答案

【问题标题】：local variable or method `config' for main:Object (NameError)main:Object (NameError) 的局部变量或方法“config”
【发布时间】：2014-08-07 23:47:39
【问题描述】：

我正在关注这篇文章以集成 Omniauth Twitter + Devise http://sourcey.com/rails-4-omniauth-using-devise-with-twitter-facebook-and-linkedin/，但我遇到了一个阻止我启动我的 rails 应用程序的问题。

 /Users/javier/Desktop/definitive/config/environment.rb:8:in `<top (required)>': undefined     local variable or method `config' for main:Object (NameError)
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `block in require'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232:in `load_dependency'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
from /Users/javier/Desktop/definitive/config.ru:3:in `block in <main>'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /Users/javier/Desktop/definitive/config.ru:in `new'
from /Users/javier/Desktop/definitive/config.ru:in `<main>'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/server.rb:50:in `app'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/server.rb:130:in `log_to_stdout'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/server.rb:67:in `start'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:81:in `block in server'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:76:in `tap'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:76:in `server'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/javier/Desktop/definitive/bin/rails:8:in `require'
from /Users/javier/Desktop/definitive/bin/rails:8:in `<top (required)>'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
from /Users/javier/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
from /Users/javier/Desktop/definitive/bin/spring:16:in `require'
from /Users/javier/Desktop/definitive/bin/spring:16:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'

我猜问题出在config/environment.rb 的第 8 行，但找不到正确的修复程序。是否可以将 environment.rb 包含在 'config/environments/' 中？

【问题讨论】：

标签： ruby-on-rails devise omniauth

【解决方案1】：

文章说你应该在里面放一些代码：

config/environments/[environment].rb

[environment].rb 表示以下文件之一：

config/environments/development.rb
config/environments/production.rb
config/environments/test.rb

如果您希望在不同环境中使用相同的设置，也可以将代码放入 config/application.rb。

显示的代码行以config.* 开头，它们应该放在Rails.application.configure do 块内。

config/environment.rb 在典型的 Rails 4 应用程序中只是 require 和 Rails.application.initialize!，不需要修改。

【讨论】：

包含在 'config/environments/development.rb' 中，但它在第 13 行返回了一个问题，即 'authentication => :plain' Log is: 'Users/javier/Desktop/definitive/ config/environments/development.rb:13:in block in <top (required)>': undefined local variable or method authentication' for #<:application:0x0000010248ba40> (NameError)'
还尝试将其添加到 'application.rb' 不知道 'environment.rb' 通常保持未编辑状态，谢谢指出。
啊，看来博文也有错别字。 authentication => :plain, 应该是 authentication: :plain
它不断返回问题。我已经上传了问题的要点，应用程序的 github 就是这个gist.github.com/malditojavi/d68121b21ed861cab830 github.com/malditojavi/definitive/blob/master/config/…
同样的错字，下一行 (14)：domain => 'somedomain.com' 应该是 domain: 'somedomain.com'。使用 hashrocket 时，哈希键不能是裸词。

【解决方案2】：

如果您在environment.rb 中有config.xxx

删除它并将这些添加到development.rb：

Rails.application.configure do
  config.xxx
end

【讨论】：

【解决方案3】：

我也遇到过这样的错误(

NameError: undefined local variable or method `server' for main:Object
        from (irb):1
        from C:/RailsInstaller/Ruby2.2.0/bin/irb:11:in `<main>'),

)

也许是因为我是 ruby on rails 的新手。因此，我没有从直接命令行启动 Rails 服务器，而是尝试从 IRB 内部启动，因此出现了该错误。

当我从 IRB 出来并从 CMD 再次启动服务器时，它启动顺利。

【讨论】：