single table inheritance的意思|示意

How to access parent attributes via single table inheritance?

如何通过单表继承访问父属性？

Inheritance is limited: with ActiveRecord, I'm forced to use a mapping strategy called single table inheritance (see Resources), which is not always optimal.

继承也受到限制：使用ActiveRecord时，我被迫使用单表继承映射策略，而该策略并不总是最佳选择。

Inheritance: Annotations — Single table, joined table, and table per class.

继承：标注——单个表、联合表和按类表。

In other words, a complete inheritance hierarchy is stored in a single database table.

换言之，整个继承层次结构存储在单个数据库表中。

In single-table inheritance, there is a single database table that contains columns for both base and derived classes.

在单表继承中，一个数据库表同时包含基类和派生类的列。