RubyOnRails：如何在Rails控制台中使用帮助器方法？

Question

可能出错了我的设置：

irb(main):001:0> truncate("Once upon a time in a world far far away", :length => 17) 
NoMethodError: undefined method `truncate' for main:Object 
     from (irb):1 
     from /usr/lib64/ruby/gems/1.9.1/gems/railties-3.2.8/lib/rails/commands/console.rb:47:in `start' 
     from /usr/lib64/ruby/gems/1.9.1/gems/railties-3.2.8/lib/rails/commands/console.rb:8:in `start' 
     from /usr/lib64/ruby/gems/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:41:in `<top (required)>' 
     from script/rails:6:in `require' 
     from script/rails:6:in `<main>' 

看起来我不能用任何文本助手（无论是在IRB和轨道控制台）。

我应该检查什么？

Answer 1

Rails控制台通过helper变量公开帮助方法。因此，请使用此相反：更多

helper.truncate("Once upon a time in a world far far away", :length => 17) 

，请仔细阅读本article on 37signals.com

Answer 2

类型下面一行到你的Rails控制台

include ActionView::Helpers

现在你的助手是在整个过程中访问导轨控制台会议，你可以继续像...

truncate("Once upon a time in a world far far away", :length => 17)