如何使用rails运行简单的MYSQL查询

我想用rails运行一个简单的MYSQL查询

Select movie-title,movie-director from moving order by rating desc limit 5;

我不想要所有开销创建模型.我只想运行查询.

做这个的最好方式是什么？
我甚至无法连接

这是我的控制器代码

ActiveRecord::Base.establish_connection ({
:adapter => "mysql2",:host => "some-rds.amazon.com",:username => "root",:password => "root",:database => "blah"})

这将产生此错误
的ActiveRecord :: ConnectionNotEstablished

谢谢

最佳答案

movie_title = 'Planet of the Apes'
sql = "SELECT * FROM movies WHERE title = #{ActiveRecord::Base.sanitize(movie_title)}"
ActiveRecord::Base.connection.execute(sql)