没有Rails的ActiveRecord请安装mysql2适配器

Question

我正在尝试使用带有ActiveRecord的ruby访问mysql数据库。ruby文件是dbtest.rb.

require 'rubygems'
require 'active_record'  
ActiveRecord::Base.establish_connection(  
  :adapter => "mysql2",  
  :host => "localhost",  
  :database => "students"  
)  
class Rubyist < ActiveRecord::Base  
end  

当我试图通过irb加载这个文件或使用ruby运行它时，我会得到以下错误：

.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:55:in  `require': Please install the mysql2 adapter: `gem install activerecord-mysql2-adapter` 

我已经成功安装了mysql2-gem和activerecord-mysql2-adapter。当我安装activerecord-mysql2-adapter时，我收到了以下消息：

gem install activerecord-mysql2-adapter
Fetching: activerecord-mysql2-adapter-0.0.3.gem (100%)
Successfully installed activerecord-mysql2-adapter-0.0.3
1 gem installed

我需要重命名适配器吗？

Answer 1

我在修复它的.bash_profile中添加了"export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LabrARY_PATH"。