How to do something on delete in Squeryl

问题

I have A and B(a_id:Long) entities.

B depends on A. So I've set constrainReference(onDelete cascade). Everything works fine.

But when I delete A I want to free some resources depending on B. Can somehow intercept B's onDelete() and perform operations then with a Squeryl way or I have to do it manually?

回答1:

In your Schema try:

override def callbacks = Seq(
        afterDelete(table) call (record => logger.debug("afterDelete")))

来源：https://stackoverflow.com/questions/12512941/how-to-do-something-on-delete-in-squeryl