Question

我正试图建立一个博客网站。我正在使用active_admin和cancancan gem。我制作的两个控制器是Post，Category。

posts_controller.rb

class PostsController < InheritedResources::Base
    load_and_authorize_resource

  private

    def post_params
      params.require(:post).permit(:title, :body, :user_id, :published_at)
    end
end

categories_controller.rb

class CategoriesController < InheritedResources::Base
    load_and_authorize_resource
  private

    def category_params
      params.require(:category).permit(:category)
    end
end

user.rb

class User < ApplicationRecord
    has_many :posts
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
  devise :database_authenticatable, 
         :recoverable, :rememberable, :validatable
  def admin?
    role == "admin"
  end
  def regular?
    role == "regular"
  end
  def guest?
    role == "guest"
  end
end

ability.rb

class Ability
  include CanCan::Ability

  def initialize(user)
    # Define abilities for the passed in user here. For example:
    #
    #user = User.new()
    if user.admin?
        can :manage, :all
    else 
        can :read, :all 
    end
  end
end

schema.rb

ActiveRecord::Schema.define(version: 2019_02_18_221247) do

  create_table "active_admin_comments", force: :cascade do |t|
    t.string "namespace"
    t.text "body"
    t.string "resource_type"
    t.integer "resource_id"
    t.string "author_type"
    t.integer "author_id"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.index ["author_type", "author_id"], name: "index_active_admin_comments_on_author_type_and_author_id"
    t.index ["namespace"], name: "index_active_admin_comments_on_namespace"
    t.index ["resource_type", "resource_id"], name: "index_active_admin_comments_on_resource_type_and_resource_id"
  end

  create_table "categories", force: :cascade do |t|
    t.string "category"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

  create_table "posts", force: :cascade do |t|
    t.string "title"
    t.text "body"
    t.integer "user_id"
    t.date "published_at"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.integer "category_id"
  end

  create_table "users", force: :cascade do |t|
    t.string "email", default: "", null: false
    t.string "encrypted_password", default: "", null: false
    t.string "reset_password_token"
    t.datetime "reset_password_sent_at"
    t.datetime "remember_created_at"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
    t.string "role", default: "guest"
    t.index ["email"], name: "index_users_on_email", unique: true
    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true
  end

end

我正在尝试基于role定义授权，用户表中有角色列，默认情况下，新用户是访客用户。

我的目标是允许来宾用户仅阅读帖子。

问题：尽管我已经在 ability.rb 中明确定义了不同类型的用户可以执行的操作，但是我仍然无法访问管理员和来宾用户。

如果您需要有关该代码的更多信息，可以在github上进行检查。

Answer 1

cancancan不再支持InheritedResources。参见此处：https://github.com/CanCanCommunity/cancancan/wiki/Inherited-Resources

您需要使用适配器。默认情况下，CanCanCan仅支持ActiveRecord和ActionController。

无法在rails中使用active_admin配置cancancan

1 个答案: