癌症多态联想能力(has_many)

Question

我有嵌套的资源，并且我想允许部门/1/列表、公司/1/列表等等，我该怎么做？顺便说一句，我正在使用rails 5和cancancan 2.0

以下是我的文件：

routes.rb

resources :departments do
    resources :lists
  end

  resources :lists do
    member do
      put :done
    end
  end

  devise_for :users, :skip => [:registrations]

  devise_scope :user do
    root to: "devise/sessions#new"
    get "/users/edit" => "devise/registrations#edit", :as => :edit_user_registration
    patch "/users" => "devise/registrations#update", :as => :user_registration
    put "/users" => "devise/registrations#update"
  end

  resources :users do
    resources :lists
  end

  resources :companies do
    resources :lists
  end

list.rb

class List < ApplicationRecord
      belongs_to :listable, polymorphic: true
    end

department.rb

class Department < ApplicationRecord
  has_many :lists,  as: :listable
end

company.rb

class Company < ApplicationRecord  
  has_many :lists, as: :listable
end

lists_controller.rb

class ListsController < ApplicationController
  load_resource :department
  load_resource :company
  load_resource :user
  load_and_authorize_resource :list, :through => [:department, :company, :user]

ability.rb

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new

    if user.has_role? :admin
      can :manage, :all
    else
      can :read, List, { :company => { :id => user.company_id } }
      can :read, List, { :department => { :id => user.departments.first.id } }
    end
  end
end

谢谢。

我还是想不通。

谁来帮帮我。