为什么irb返回NameError:数据库中所有对象的未初始化常量？

Question

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!

Answer 1

看起来irb你想要rails console(或rails c简称)运行.