自定义类型总是改变记录，让它变脏

Posted 2023-02-15

【中文标题】自定义类型总是改变记录，让它变脏

【英文标题】：custom type always change the record, leaving it dirty

【发布时间】：2021-12-31 11:37:15

【问题描述】：

我有以下自定义类型：

class EncryptedTextType < ActiveRecord::Type::Text
  def deserialize(encrypted_value)
    return unless encrypted_value

    Encryptor.decrypt(encrypted_value)
  end

  def serialize(plain_value)
    return unless plain_value

    Encryptor.encrypt(plain_value)
  end
end

ActiveRecord::Type.register(:encrypted_text, EncryptedTextType)

这很好用，但总是让我的记录变脏。每次我从使用这种类型的数据库中加载记录时，它都会立即变脏。

这是记录：

class Organization < ApplicationRecord
  attribute :access_key, :encrypted_text

[1] pry(main)> organization = Organization.last
  Organization Load (0.7ms)  SELECT "organizations".* FROM "organizations" ORDER BY "organizations"."created_at" DESC, "organizations"."id" DESC LIMIT $1  [["LIMIT", 1]]
=> #<Organization:0x00007fe000628198
 id: "c968db2e-dd5a-4016-bf3d-d6037aff4d7b",

[2] pry(main)> organization.changed?
=> true
[3] pry(main)> organization.changes
=> "access_key"=>["de07e...", "de07e..."]

奇怪的是，即使访问密钥没有改变，AR 仍然认为它改变了。

【参考方案1】：

供以后参考：我忘了实现changed_in_place?

def changed_in_place?(raw_old_value, new_value)
  raw_old_value != serialize(new_value)
end

成功了