> For the complete documentation index, see [llms.txt](https://kelby.gitbook.io/rails-beginner-s-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kelby.gitbook.io/rails-beginner-s-guide/activerecord_convention_configuration.md).

# Active Record 数据库连接：底层适配，约定、配置

* Model Schema
* Naming Conventions
* Schema Conventions
* Timestamps
* Core
* ~~Attribute~~

和属性的类型转换有关，在 Attribute Set 里会用到。尽管 Attribute Set 也属于底层。

* ~~Attribute Set~~
* ~~Attribute Decorators~~

相对而言较底层，使用 Rails 的话，一般不会直接用到的它们：

* Connection Handling
* Serialization
* Migration DatabaseTasks
* Statement Cache
* ~~Explain~~
* ~~Explain Registry~~
* ~~Explain Subscriber~~
* ~~Query Cache~~
* ~~Result~~
* ~~Runtime Registry~~
* ~~Sanitization~~
* ~~Legacy Yaml Adapter~~