Question

I have three models. Call them A, B, and C. Model A has _post_put_hook that creates 100 model B’s. Model B has _post_put_hook that creates 100 model C’s.

Is it better to have the _post_put_hook triggered a deferred function (aka, task queue) or a put_async? All the hooks have a small amount of computation, but very very limited. I think deferred is safer, but I’d rather do it the “right way.”

I’m using Google App Engine’s new ndb library.

Note: The reason I’m doing all the _post_put_hooks is that I’m purposefully duplicating and repackaging information.

Answer 1

Each write to A is going to result in 10,000 entities being written. Yes, it’s safe to say that you should do this in a task (or if possible, avoid doing it in the first place).