我在应用程序中使用STI，因此Procedure和DataProcess模型都继承自BusinessProcess类：

class BusinessProcess < ApplicationRecord
end

class Procedure < BusinessProcess
end

class DataProcess < BusinessProcess
  has_many :treatments, inverse_of: :parent, dependent: :destroy
end

class Treatment < ApplicationRecord
  belongs_to :parent, class_name: "DataProcess", foreign_key: "business_process_id"
end

字符串
一切都如预期的那样工作，直到我从show视图发出一个查询，如@data_process.treatments.first。这会引发以下错误：

*** ActiveRecord::StatementInvalid Exception: PG::UndefinedColumn: FEHLER:  Spalte treatments.data_process_id existiert nicht
LINE 1: SELECT  "treatments".* FROM "treatments" WHERE "treatments"....
                                                       ^
: SELECT  "treatments".* FROM "treatments" WHERE "treatments"."data_process_id" = $1 ORDER BY "treatments"."id" ASC LIMIT $2

型
看起来Rails并没有考虑到外键是business_process_id，而是生成了它自己的，忘记了STI上下文。
有没有办法说得更具体一点？