Rails & CanCan: If user is logged in then allow him/her to view index page?

I am using authlogic and cancan on a rails 3 application, I want to allow all logged in users to access the users index page, i have tried something like this but it dosent seem to be working:

ability class:

class Ability
  include CanCan::Ability

  def initialize(user)

    user ||= User.new

    can :index, User if UserSession.find

    can :read, User if UserSession.find

end

Controller:

def index
    @users = User.search(params[:search]).order('username').page(params开发者_StackOverflow[:page]).per(1)
    authorize! :index, @users
  end




def show
     @user = User.find(params[:id])
     authorize! :read, @user
     respond_to do |format|
     format.html # show.html.erb
     format.xml  { render :xml => @user }
    end
  end

thanks

---

I find it's easier to use load_and_authorize_resource at the top of my controllers. Then your ability class contains all the ability logic instead of having it strewn about your controllers.

ability.rb

class Ability
  include CanCan::Ability

  def initialize(user)
    if user
      can :index, User
      can [:show, :edit, :update, :destroy], User, :id => user.id
    end
  end
end

users_controller.rb

class UsersController < ApplicationController
  load_and_authorize_resource

  def index
    @users = User.search(params[:search]).order('username').page(params[:page]).per(1)
  end

  def show
  end

  ...

end

I haven't used authlogic in a while as I tend to use devise now, so I'm not sure if my sample code is authlogic ready. If you don't want to use load_and_authorize_resource, my code shows how to limit what users can see in the ability class, but in your code I'd change :read to :show.

---

Continuing from my comment, the problem was in the following code

authorize! :index, @users

Here, you're passing an Array of users to the CanCan's method, while your can :index, User declaration defines the authorization for a User object.