如何称呼“主人” Rails3 中的这种多态模型

发布于 2024-10-13 02:57:15 字数 968 浏览 6 评论 0原文

class Chair < ActiveRecord::Base
  has_many :buildings, :as => :faculty
end

class Department < ActiveRecord::Base
  has_many :buildings, :as => :faculty
end

class Building < ActiveRecord::Base
  belongs_to :faculty, :polymorphic => true
end

在路线文件中，我有：

resources :departments do
  resources :buildings do
end

resources :chairs do
  resources :buildings do
end

如何以良好的方式为部门和主席在一个控制器中建造一座新大楼。我知道，我可以创建另一个有用的函数，它会检查谁

class BuildingsController < ApplicationController
  def new
    @parent = faculty
    @building = @parent.buildings.build
  end
end

在 application_controller: 中创建 Building:

def faculty
  if params[:department_id]
    Department.find(params[:department_id])
  elsif params[:chair_id]
    Chair.find(params[:chair_id])
  end
end

但我想问，Rail 还有其他方法可以做到这一点吗？也许Rails3中存在一些我可以用来获取信息的方法：谁想要创建建筑物，而不需要实现其他功能。

原文

class Chair < ActiveRecord::Base
  has_many :buildings, :as => :faculty
end

class Department < ActiveRecord::Base
  has_many :buildings, :as => :faculty
end

class Building < ActiveRecord::Base
  belongs_to :faculty, :polymorphic => true
end

In routes file I have:

resources :departments do
  resources :buildings do
end

resources :chairs do
  resources :buildings do
end

How can I build in good way a new Building in one controller for Department and Chair. I know, that I can create another helpful function, that it will check for who create Building:

class BuildingsController < ApplicationController
  def new
    @parent = faculty
    @building = @parent.buildings.build
  end
end

in application_controller:

def faculty
  if params[:department_id]
    Department.find(params[:department_id])
  elsif params[:chair_id]
    Chair.find(params[:chair_id])
  end
end

but I am asking, is there any other Rail's way to do it? Maybe there exist some method in Rails3 that I can use to get information: Who want's to create building, without implementing another function faculty.

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