User Management in Ruby on rails

Hello Guys,

I am a PHP developer. newbie to ROR. I want to learn Ruby on rails.
and my client need a user management application with the following
features
Login Managements
User permission ( certain user can add/update record , certain user
can view the records , etc...)
CRUD (employee management).

Could you please suggest me how Can I achive it or If you have any
source code, Please send it to me.

Thanks
Mohamed

Login Managements

There's lots of plugins/gems that handle what you're asking about.
Personally, I'd recommend "Clearance" for user authorisation
management.
http://ruby-toolbox.com/categories/rails_authentication.html

User permission ( certain user can add/update record , certain user
can view the records , etc...)

For permissions use "Aegis" but "CanCan" seems very popular.
http://ruby-toolbox.com/categories/rails_authorization.html

CRUD (employee management).

Well, the Rails scaffolding will get you off to a good start there :wink:
But there are other "admin" interfaces:
http://ruby-toolbox.com/categories/rails_admin_interfaces.html