Insert data to the databse

how can i insert data to the database from any controller

Assuming you want to add a user from an arbitrary controller… You
would instantiate the new user in an action (‘new_user’) and save it
to the database (and raise validation errors) from a create action
(here called ‘create_user’)

class ArbitraryController < ActionController::Base

def index
@users = User.find(:all)
end

def new_user
@user = User.new
end

def create_user
@user = User.new(params[:user])
@user.save
redirect_to :action => ‘index’
end

end

You would have to define the routes in your routes.rb file like:

map.connect ‘/user/new’, :controller => ‘arbitrary’, :action =>
‘new_user’

HTH