Activeadmin: "Collection is not a paginated scope" error when adding a before_filter

Hey all,

I am trying to add a before_filter to the index action so I can set the instance variable in the before_filter and hopefully when the index action gets called, it will check if the var is already set. And then if it is, use that rather than the activeadmin defaults:

ActiveAdmin.register Account do
//... (code)

controller do
  before_filter :checkviews, :only => :index

  def checkviews
    if params[:q] && params[:q][:ancestry_eq]
      @accounts = Account.ancestry_scoper(Account.find_by_id(params[:q][:ancestry_eq]))
    end
  end
end

Problem is I get this error message:

Collection is not a paginated scope. Set collection.page(params[:page]).per(10) before calling :paginated_collection.