Is it possible to use cancan with two ability class

I'm using rails 3.0.9, cancan 1.6.7 and devise 1.4.8

I'm using two devise models(User and Admin) for different log-in and registration process

So I want to divide the abilities depend upon the logged-in user(resource), because there are more than 70 models and only 10 models are common for both type of users(here more than 50 models and views are only used by Admin users)

I want to implement two Ability class(UserAbility and AdminAbility) and the devise helper method current_user/current_admin should be passed to UserAbility/AdminAbility

Example:

In ApplicationController.rb file

    def current_ability
        if current_user
            @current_ability = UserAbility.new(current_user)
        elsif current_admin
            @current_ability = AdminAbility.new(current_admin)
        end
    end

From the above my questions,

1. Is multiple ability class is possible in cancan, if possible then how to create it because I tried

   rails g cancan:user_ability

   but I got error as Could not find generator cancan:user_ability.

2. How to choose the appropriate Ability class for the logged-in User/Admin.

3. If a controller is accessed by both the User and Admin, then how can I get the currently logged-in User/Admin's object

Is there any other solution for this?

Any one please help to solve this

...that said, you can use multiple ability models directly if you prefer:

class UserAbility
  include CanCan::Ability

  def initialize(user)
    can :read, :all
  end
end

class AdminAbility
  include CanCan::Ability

  def initialize(admin)
    can :manage, :all
  end
end

class ApplicationController < ActionController::Base
  # overriding CanCan::ControllerAdditions
  def current_ability
    if current_account.kind_of?(AdminUser)
      @current_ability ||= AdminAbility.new(current_account)
    else
      @current_ability ||= UserAbility.new(current_account)
    end
  end
end