小编Val*_*ler的帖子

我将更好的错误gem添加到我的gemfile中,如下面的gemfile中所示,并运行bundle并查看Using better_errors 1.1.0并重启我的服务器几次.我观看了有关如何安装它的railscast剧集.我以前从未遇到过安装任何其他宝石的问题(我是编程新手).我阅读了文档,我已经检查了这个:

Note: If you discover that Better Errors isn't working - particularly after upgrading from version 0.5.0 or less - be sure to set config.consider_all_requests_local = true in config/environments/development.rb.

关于如何让这个宝石工作的任何想法将非常感谢!这是我的gemfile:

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.5'

group :development, :test do

  gem 'rspec-rails'
  gem 'capybara'
end


# Use sqlite3 as the database for Active Record
 group :production do
   gem 'pg'
   gem 'rails_12factor'
 end

 group :development do
   gem 'sqlite3'
   gem …

我正在建立一个Q&A应用程序的一半,我已经成功播种了我的数据库,并且可以看到我的浏览器和服务器日志以及之前的irb都创建了对象.现在当我去尝试检查irb中的对象时,对于我给它的每个对象,irb返回"NameError:uninitialized constant".例如:

2.0.0-p481 :001 > user = User.find(1)
NameError: uninitialized constant User
    from (irb):1
    from /home/vagrant/.rvm/rubies/ruby-2.0.0-p481/bin/irb:12:in `<main>'
2.0.0-p481 :002 > question = Question.find(1)
NameError: uninitialized constant Question
    from (irb):2
    from /home/vagrant/.rvm/rubies/ruby-2.0.0-p481/bin/irb:12:in `<main>'
2.0.0-p481 :003 > user = User.find
NameError: uninitialized constant User
    from (irb):3
    from /home/vagrant/.rvm/rubies/ruby-2.0.0-p481/bin/irb:12:in `<main>'
2.0.0-p481 :004 > user = User.new
NameError: uninitialized constant User
    from (irb):4
    from /home/vagrant/.rvm/rubies/ruby-2.0.0-p481/bin/irb:12:in `<main>'

我是编程的新手,所以如果有人能解释为什么会发生这种情况,我将不胜感激!