请高手帮看看这个问题，脱离Rails使用ActiveRecord出现Could not find table 'products'的错误

代码如下：
require 'rubygems'
require 'active_record'

ActiveRecord::Base.establish_connection(
:adapter => "sqlite3" ,
:database => "db/development.sqlites3"
)

class Product < ActiveRecord::Base
end

---

rake db:create
rake db:migrate

---

你确定数据库里有这个表？

---

我正好做了类似的事情，给你参考：

require 'rubygems'
require 'active_record'

$conn_db = { 
	:adapter => "mysql2",  
	:host => "192.168.3.199",  
	:database => "aaa_db",
	:username => "root",
	:password => "pppppp",
	:pool => 5
} 

class MyTable < ActiveRecord::Base
	establish_connection $conn_db;
end
.... [其他ruby代码]