Old rails has a buitl in pagination option. For example is you have to paginate @user, which is a model object for the table user
def user_list
@user_pages,@users=paginate(:users,:order=>’name’)
end
But in new version of rails, they removed the pagination option. So you need to install a plugin , which name is will_paginate
You can install this plugin using gem
gem install [...]