Cancan 和 Devise 控制用户更新其他角色的能力

Cancan and Devise controlling user's ability to update other roles

我正在使用 cancan(can) 并在我的 Ruby Rails 应用程序中设计控制用户权限。我的用户模型有四个枚举角色:

class User < ApplicationRecord
    enum role: {location: 0, basic: 1, admin: 2, moderator: 3}

我想做的是定义每个角色在 ability.rb

中可以控制的角色

我的 ability.rb 目前是这样的:

if user.basic?
    can :read, :all
    can :active_orders_index, Order
    can :search_orders, Order
    can :focused_show, Location
    can :mark_task_completed, Task 
    can :finish_task, Task
    cannot :create, User
elsif user.location?
    can :read, Location
    can :focused_show, Location
elsif user.admin?
    can :manage, :all    
elsif user.moderator?
    can :manage, :all
end

我在这个例子中试图做的就是阻止基本用户创建用户。在当前的表单中,基本用户 能够创建用户(cancan 不会因未授权而重定向),这不是预期的效果。我相信这是因为 :create 方法来自我的用户控制器,它没有被用来创建用户。我正在使用 Devise 的 new_user_registration 进行新注册。

问题的最简单形式:

  1. 有没有办法做类似的事情->

    cannot :sign_up, User.where(:role => 'moderator')
    

    我可以指定哪些角色可以管理哪些其他角色?

  2. 我应该使用什么设计 controller/methods 来设置这些限制?

抱歉,如果这个问题已经得到解答,我通读了有关定义能力和设计的 wiki,但无法弄明白。

在此先致谢,我可以提供任何其他需要的代码片段来帮助您!

应用程序控制器: 我已经注释掉加载和授权并将它移到其他控制器的开头,因为它导致了不需要的行为(我不记得到底是什么)。

class ApplicationController < ActionController::Base
#load_and_authorize_resource

protect_from_forgery with: :exception

before_action :configure_permitted_parameters, if: :devise_controller?

rescue_from CanCan::AccessDenied do |exception|
    respond_to do |format|
      format.json { head :forbidden, content_type: 'text/html' }
      format.html { redirect_to main_app.new_user_session_url, notice: exception.message }
      format.js   { head :forbidden, content_type: 'text/html' }
    end
end

def after_sign_in_path_for(resource)
  if resource.role == 'location'
    location_focused_path(Location.find_by(name: resource.username))
  elsif resource.role == 'basic'
    locations_path
  elsif resource.role == 'admin'
    active_orders_path
  elsif resource.role == 'moderator'
    active_orders_path
  end
end

protected

def configure_permitted_parameters
  added_atrs = [:role, :username, :email]
  devise_parameter_sanitizer.permit(:sign_up, keys: added_atrs)
  devise_parameter_sanitizer.permit(:account_update, keys: added_atrs)
end
end

注册控制器: 由 Devise 生成

class Users::RegistrationsController < Devise::RegistrationsController
#load_and_authorize_resource

skip_before_action :require_no_authentication, only: [:new, :create, :cancel]

# POST /resource
def create
    build_resource(sign_up_params)

    # yield resource if block_given?
    # ^ I removed this line otherwise identical to teh source code
    resource.save
    if resource.persisted?
       if resource.active_for_authentication?
           set_flash_message! :notice, :signed_up
           sign_up(resource_name, resource)
           respond_with resource, location: after_sign_up_path_for(resource)
       else
           set_flash_message! :notice, :"signed_up_but_#{resource.inactive_message}"
           expire_data_after_sign_in!
           respond_with resource, location: after_inactive_sign_up_path_for(resource)
       end
    else
       clean_up_passwords resource
       set_minimum_password_length
       respond_with resource
    end
 end

# Signs in a user on sign up. You can overwrite this method in your own
# RegistrationsController.
def sign_up(resource_name, resource)
    true
end

end

这个问题的答案很简单:

if user.present?
        if user.basic?
            can :read, :all
            can :active_orders_index, Order
            can :search_orders, Order
            can :focused_show, Location
            cannot :mark_task_completed, Task 
            can :finish_task, Task
            cannot :manage, User # ADDED LINE
        elsif user.location?
            can :read, Location, :name => user.username
            can :focused_show, Location, :name => user.username
            cannot :manage, User
        elsif user.admin?
            can :manage, :all
            cannot :manage, User, role: 3 # ADDED LINE
        elsif user.moderator?
            can :manage, :all
        end
 end

在我的 ability.rb