运行以下命令时出现此错误:
$ rvm upgrade 1.9.2-p180 1.9.3-p0
Are you sure you wish to upgrade from ruby-1.9.2-p180 to ruby-1.9.3-p0? (Y/n): Y
Installing new ruby ruby-1.9.3-p0
Installing Ruby from source to: /Users/ericjones/.rvm/rubies/ruby-1.9.3-p0, this may take a while depending on your cpu(s)...
ruby-1.9.3-p0 - #fetching
ruby-1.9.3-p0 - #extracted to /Users/ericjones/.rvm/src/ruby-1.9.3-p0 (already extracted)
Fetching yaml-0.1.4.tar.gz to /Users/ericjones/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /Users/ericjones/.rvm/src
Configuring yaml in /Users/ericjones/.rvm/src/yaml-0.1.4.
Compiling yaml in /Users/ericjones/.rvm/src/yaml-0.1.4.
Installing yaml to /Users/ericjones/.rvm/usr
ruby-1.9.3-p0 - #configuring
ruby-1.9.3-p0 - #compiling
ERROR: Error running 'make ', please …首先是警告。我是一个总的 RoR n00b，但我有编程经验，所以我得到了基本的。我有一个正在构建的应用程序，我需要为其构建一个复杂的搜索引擎。基本布局是指南>> 个人资料>> 指导>> MentorAreas。下面是每个模型的代码，然后是我正在尝试构建的代码。我的问题是我似乎无法找出正确的对象名称来让搜索引擎搜索mentor_areas。
系统设置：
rails -v :: Rails 3.1.1
ruby -v :: ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.7.0]
RanSack :: ransack (0.5.8) from git://github.com/ernie/ransack.git (at master)
指导：
class Guide < User
end
用户：（相关内容）
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
# Virtual attribute for authenticating by either username or email
# This is in addition to a …