ruby - 纸迹 gem : How to use a custom item_type for specific model

Question

是否有为版本配置 item_type 的选项？我有一个 Post 类，默认的 item_type 是 Post；是否有配置为 Foo 的选项？

示例更新:

class Post < ActiveRecord::Base
  has_paper_trail
end

post = Post.create # this creates a new post along with a version.
version = post.versions.first
version.item_type = 'Post' # Item type here is the name of the base model 'Post'.

Answer 1

Is there an option to configure the item_type for a version? I have a class Post, and the default item_type for that would be Post; is there an option to configure that be Foo?

没有。当您调用 has_paper_trail 时，它会添加一个名为 item 的多态关联。因此，PaperTrail 不控制数据库列 item_type，ActiveRecord 控制。

下面是 has_many 关联的定义:

has_many(
  versions_association_name, # Usually "versions"
  -> { order(model.timestamp_sort_order) }, # Usually "created_at"
  class_name: version_class_name, # Usually "PaperTrail::Version"
  as: :item # Specifies a polymorphic interface
)