滑轨：缓存类忽略混入

Question

我已经扩展了的ActiveRecord :: Base类如下：

LIB/activerecord_ext.rb：

class ActiveRecord::Base 
    named_scope( 
    :recent, 
    :conditions => ['created_at > ?', (Time.new - 3.day)], 
    :order => 'created_at DESC', 
    :limit => 5 
) 
end 

在配置/ environment.rb中：

require "activerecord_ext" 

这可以正常工作，直到启用类缓存。当我设置

config.cache_classes = true 

我得到这个错误：

>> Person.recent 
NoMethodError: You have a nil object when you didn't expect it! 
The error occurred while evaluating nil.call 
from /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/named_scope.rb:102:in `recent' 
from (irb):1 

我认为我做错了一起列入延长。任何帮助将不胜感激。

Answer 1

是require 'activerecord_ext'之前还是之后的config.cache_classes = true行？无论如何，请尝试将require'activerecord_ext'放入初始化器中。