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如何用一个查询访问两个多态关联?

activerecord ruby ruby-on-rails

0

Tintin81 · 技术社区 · 6 年前

在我的Rails 6应用程序中,我有以下模型:

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

如何访问帐户的 carriers clients 在一个查询中?

我很想做一些像 account.people 但目前还没有找到实现这一目标的方法。

0 回复 | 直到 6 年前

1

2

Ravi Teja Gadi 6 年前

不能对两个关联使用相同的方法名,而可以将其重命名为 carrier_people client_people

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

你可以这样装。

Account.includes(:carrier_people, :client_people)