If you've not seen Active Record — the underlying persistence layer in Rails — before, I recommend that you take a look first at this earlier Rails article in the Crossing borders series.

如果以前没有学习过活动记录——Rails底层的持久性层，我建议您先阅读跨越边界系列中以前的这篇Rails文章。

youdao

If you've not seen Active Record — the underlying persistence layer in Rails — before, I recommend that you take a look first at this earlier Rails article in the Crossing borders series.

如果以前没有学习过活动记录——Rails底层的持久性层，我建议您先阅读跨越边界系列中以前的这篇Rails文章。

youdao