"Nuke version" to simplify data model changes during development

For renames and type changes, there is an UID-based approach to work with already deployed databases.

However during development, it may just be easier to wipe all data and model data.

API outline:

MyObjectBox.builder().version(7).nukeDataBeforeVersion(7)

Thus, ObjectBox would track the current version of the data model, and just discard everything for earlier versions.

Alternative API: annotations, but where to apply them? Also the builder seems appropriate because that's where the initialization happens.

Looking into the future, this approach should also work nicely with custom migration callbacks. E.g.

MyObjectBox.builder().version(10).nukeDataBeforeVersion(7).migrate(new MyMigration())

Here, versions 1 to 6 just would be nuked, and version 10 would be applied. For versions 7 to 9, the custom migration would be triggered.

Feedback on this approach welcome!

没有指定文件或测试；首先检查 MyObjectBox.builder() 的初始化路径，以及数据模型版本的跟踪方式。定义丢弃早期版本数据的 API 和行为，同时保留针对后续版本的拟议自定义迁移处理。