表后端转换在设置为 null-sy 值时自毁

如何解决表后端转换在设置为 null-sy 值时自毁

不确定这是错误、功能、遗漏的文档还是错误的配置，但是当我将所有翻译属性设置为 null-sy 值时，翻译记录会自毁。

我的表后端移动性设置如下：

schema.rb

create table "base_model",force: :cascade do |t|
  t.boolean "is_animal"
  t.boolean "is_vehicle"

  ...
end

create table "base_model_translation",force: :cascade do |t|
  t.bigint "base_model_id",null: false
  t.string "locale",null: false
  t.boolean "is_animal_translation"
  t.boolean "is_vehicle_translation"

  ...
end

base_model.rb

class BaseModel < ApplicationRecord
  extend mobility

  has_many  :translations,class_name: "BaseModelTranslations",autosave: true,dependent: :destroy

  translates :is_animal_translation
  translates :is_vehicle_translation
end

base_model_translation.rb

class BaseModelTranslation < ApplicationRecord
  belongs_to  :base_model,touch: true,inverse_of: :translations
end

在 Rails 控制台上：

base_model = BaseModel.last
base_model.reload.translations # => []

# SET TO NULLSY
base_model.is_animal_translation = true
base_model.save
base_model.reload.translations
# => [
# <#BaseModel::Translation
# id: 1,# is_animal_translation: true,# is_vehicle_translation: nil,# ...>]

base_model.is_animal_translation = false
base_model.save
base_model.reload.translations # => []

# SET TO PARTIAL NULLSY THEN FULL NULLSY
base_model.is_animal_translation = true
base_model.is_vehicle_translation = true
base_model.save
base_model.reload.translations
# => [
# <#BaseModel::Translation
# id: 1,# is_vehicle_translation: true,# ...>]

base_model.is_animal_translation = false
base_model.save
base_model.reload.translations
# => [
# <#BaseModel::Translation
# id: 1,# is_animal_translation: false,# ...>]

base_model.is_animal_translation = false
base_model.save
base_model.reload.translations # => []

这是有意的行为吗？如果是这样，是否可以绕过？

编辑：看起来这是一个预期的行为 (https://github.com/shioyama/mobility/blob/3cbeaeec8ef0a6d22ee05229141cd2b2bb33b17f/lib/mobility/backends/active_record/table.rb#L306)，是否有绕过这个的方法？