errors with non-logged in users

[vince]

I've got a configure block defined in a pretty standard way:

    role :admin, proc { |user| user.is_admin } do
       can :manage, Post
    end

When I view the page as a non logged in user though I get an error:

undefined method `is_admin' for nil:NilClass

I must be missing something pretty simple -- unless it depends on authentication before authorization? Little help please?

[pokonski]

This is of course expected since current_user is not present. This is something you have to take care of outside Access Granted.

A popular pattern for solving this is always returning some user. For example, we can mock a GuestUser account responding to basic methods and identifying itself as a guest:

class GuestUser
  def is_admin?
    false
  end

  def is_guest?
    true
  end
end

and in your application controller:

def current_user
  super || GuestUser.new
end

this will make sure there's always an instance of a User you can run checks on.

[vince]

Perfect, thanks for the clarification and quick response!

[pokonski]

Glad I could help :+1:

On 14 July 2016 at 16:34, Vince Wadhwani notifications@github.com wrote:

Perfect, thanks for the clarification and quick response!

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Piotr Okoński piotrek@okonski.org | +48 792 097 151