ruby-on-rails - CanCan + Devise：管理员用户无法获得权限，即使他应该

Question

这是代码。

class WebsitesController < ApplicationController
  load_and_authorize_resource

  ...
end

class ApplicationController < ActionController::Base
  ...

  check_authorization :unless => :do_not_check_authorization?

  private
    def do_not_check_authorization?
      respond_to?(:devise_controller?)
    end
end

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new
    if user.role? == "admin"
      can :manage, :all
    elsif user.role? == "developer"
      can :manage, :websites
      can :manage, :pages
      can :manage, :templates
    elsif user.role? == "editor"
      can :manage, :pages
    end
  end
end

从外观上看，具有管理员角色的用户应该能够对网站控制器执行任何操作，因为can :manage, :all.

但是当我点击网站/索引时，我得到

CanCan::AccessDenied in WebsitesController#index

You are not authorized to access this page.

为什么会这样？

Answer 1

我太笨了

我user.role?回来了true，但true == "admin"总是假的。