Rails Controller

i know ruby on rails little bit(but i have to connect mysql with ruby so
plz give the details procedure)

1) Plz give me some details abt rails controller.... & its contained
folders(app,log,public,script,test, temp......) I want to know the
functions (& other details) of each them...

2)how can i connect mysql with ruby.....plz give details... i.e "how r
we doing so? and why?"

any help...............plz

thanx in advance

www.railscasts.com

spend some time there, im sure it will help.

2.

Go to config/database.yml

development:
  adapter: mysql
  database: development
  username: root
  password: PASSWORD
  host: localhost
  socket: /var/lib/mysql/mysql.sock
  timeout: 5000

Now rails can connect to the database. If not, you have to make
database in mysq command line

mysql -u root -p
create database development;