对于这个应用程序，我正在尝试使用cancan/cancancan、devise和rolify实现job_code风格的访问控制。
只有具有job_code: create_user权限的网站管理员才能创建新用户。
以下是代码：
class RegistrationsController < Devise::RegistrationsController
before_filter :check_permissions, :only => [ :new, :create, :cancel ]
skip_before_filter :require_no_authentication
def check_permissions
authorize! :create, resource
end
end
class Ability
include CanCan::Ability
def initialize(user)
alias_action :create, :read, :update, :destroy, :to => :crud
if user.has_role? :create_user
can :create, User
end
if user.has_role? :create_annoucement
can :create, Announcement
end
end
end
在 routes.rb 文件中，我有以下代码：
devise_for :users ,:controllers => { :registrations => "registrations" }, :path_names => {:sign_in => "login", :sign_out => "logout"}, :path => "account"
应用程序控制器
class ApplicationController < ActionController::Base
# Prevent CSRF attacks by raising an exception.
# For APIs, you may want to use :null_session instead.
protect_from_forgery with: :exception
before_action :authenticate_user!
check_authorization unless: :devise_controller?
before_filter :set_start_time if Rails.env.development?
before_action :configure_permitted_parameters, if: :devise_controller?
rescue_from CanCan::AccessDenied do |exception|
#https://github.com/ryanb/cancan/wiki/Devise
if current_user.nil?
session[:next] = request.fullpath
puts session[:next]
redirect_to new_user_session_path, :alert => "You have to log in to continue."
else
render file: "#{Rails.root}/public/403", formats: [:html], status: 403, layout: false
end
end
def set_start_time
@start_time = Time.now.usec
end
def configure_permitted_parameters
#devise_parameter_sanitizer.for(:sign_in) { |u| u.permit(:name, :email) }
devise_parameter_sanitizer.for(:sign_up) { |u| u.permit(:first_name, :last_name, :email, :password, :password_confirmation) }
devise_parameter_sanitizer.for(:account_update) { |u| u.permit(:first_name, :last_name, :email, :password, :password_confirmation, :current_password, :user_manual) }
end
end
当我在 abilities.rb 中使用以下代码时
if user.has_role? :create_user
can :create, :all
end
它运行完美。它带我到用户注册页面。
但是，当我有这段代码时
if user.has_role? :create_user
can :create, User
end
提示访问被拒绝（403页）
我很难理解，在 can :create, User 中，应该使用什么替代User。