Rails rolify 宝石/关联问题

Question

我将 rolify gem 与 AdminUser 的设计一起使用

我的Roles 表

 class RolifyCreateRoles < ActiveRecord::Migration
  def change
    create_table(:roles) do |t|
      t.string :name
      t.references :resource, :polymorphic => true

      t.timestamps
    end

    create_table(:admin_users_roles, :id => false) do |t|
      t.references :admin_user
      t.references :role
    end

    add_index(:roles, :name)
    add_index(:roles, [ :name, :resource_type, :resource_id ])
    add_index(:admin_users_roles, [ :admin_user_id, :role_id ])
  end
end

模型“角色”

 class Role < ActiveRecord::Base
  has_and_belongs_to_many :admin_users, :join_table => :admin_users_roles

  belongs_to :resource,
             :polymorphic => true

  validates :resource_type,
            :inclusion => { :in => Rolify.resource_types },
            :allow_nil => true

  scopify
end

我的问题是，当我想让用户属于某个角色时，它会给出空数组而不是我的 adminuser 对象

u = AdminUser.first
u.add_role(:admin)

u.roles => #<Role id: 1, name: "admin", admin_user_id: 1, resource_id: nil, resource_type: nil, created_at: "2016-06-16 15:03:33", updated_at: "2016-06-17 09:04:30">

当我这样做时

Role.first=> #<Role id: 1, name: "admin", admin_user_id: 1, resource_id: nil, resource_type: nil, created_at: "2016-06-16 15:03:33", updated_at: "2016-06-17 09:29:32">
Role.first.admin_users => [] 

Answer 1

检查用户是否具有全局角色：

user = User.find(1)
user.add_role :admin # sets a global role
user.has_role? :admin
=> true

或在您的情况下检查实例级别

u = AdminUser.first
u.add_role(:admin)

> Role.first=> #<Role id: 1, name: "admin", admin_user_id: 1,
> resource_id: nil, resource_type: nil, created_at: "2016-06-16
> 15:03:33", updated_at: "2016-06-17 09:29:32">

而不是这样做 => Role.first.admin_users => [] 试试

u = AdminUser.first
u.roles

Rolify 有一个非常清晰的文档 Rolify

Answer 2

哦，我通过更改我的 admin_user 模型中的关系来修复它

从has_many 到has_and_belongs_to_many :roles