just check out these books
head first rails…
its a good start …
If you understand programming and learn quickly, you can start by just reading a good solid book on ruby to gain an understanding of how classes and objects work. Once you achieve that understanding you are ready for rails.
IMHO, you can always learn a lot. I've read the following books in order:
Apress - Beginning Ruby - From Novice to Professional Foundation Rails 2 Agile Web Development with Rails 3rd Edition Enterprise Integration with Ruby
Check out this topic here: