ruby-on-rails - 如何通过一个查询访问两个多态关联？

Question

在我的 Rails 6 应用程序中，我有这些模型:

class Account < ApplicationRecord

  has_many :carriers
  has_many :clients

  # Unfortunately, these two don't work together. I have to uncomment one of them to get the other one to work:
  has_many :people, :through => :carriers # works but omits clients
  has_many :people, :through => :clients # works but omits carriers

end

class Carrier < ApplicationRecord

  belongs_to :account

  has_many :people, :as => :personalizable

end

class Client < ApplicationRecord
  
  belongs_to :account

  has_many :people, :as => :personalizable

end

class Person < ApplicationRecord

  belongs_to :personalizable, :polymorphic => true

end

我如何访问帐户的 carriers 和 clients在一个查询中？
我想做类似 account.people 的事情显示 全部 帐户的人，但还没有找到实现这一目标的方法。
怎么做到呢？

Answer 1

您不能为两个关联使用相同的方法名称，而可以将其重命名为 carrier_people和 client_people并急切加载两者。

class Account < ApplicationRecord

  has_many :carriers
  has_many :clients

  has_many :carrier_people, :through => :carriers, source: :people # works but omits clients
  has_many :client_people, :through => :clients, source: :people # works but omits carriers

end

你可以像这样急切加载。

Account.includes(:carrier_people, :client_people)