ruby-on-rails - ActiveRecord::HasManyThroughOrderError

Question

我在 3 个模型之间有一个 has_one 关联，但它有一个错误说“ActionView::Template::Error(不能有一个 has_many :through association 'Policy#intermediary' 它在通过关联之前通过 'Policy#invoice'定义。)”

政策模式

class Policy < ApplicationRecord

    self.table_name = "gipi_polbasic"
    self.primary_key = "policy_id"

    has_one :invoice
    has_one :intermediary, through: :invoice, foreign_key: :intrmdry_intm_no

中介模式

class Intermediary < ApplicationRecord
    self.table_name = "giis_intermediary"
    self.primary_key = "intm_no"

    has_one :invoice, foreign_key: :intrmdry_intm_no
    belongs_to :policy, foreign_key: :policy_id

发票模型

class Invoice < ApplicationRecord
    self.table_name = "gipi_comm_invoice"
    self.primary_key = "intrmdry_intm_no"

    belongs_to :policy, foreign_key: :policy_id
    belongs_to :intermediary, foreign_key: :intrmdry_intm_no

Answer 1

对于其他人 - 请参阅他们的主题 https://github.com/rails/rails/issues/29123

为我解决的是切换 has_ones 的顺序

has_one :intermediary, through: :invoice, foreign_key: :intrmdry_intm_no
has_one :invoice