undefined | Better HN

0 pointssverhagen3y ago0 comments

Yeah, I was going to say something similar. But ORMs get blamed for obscuring what's going on, to the point that a developer may end up doing some sort of inefficient 1-to-n lookup that would've indeed been much better off as a SQL JOIN.

I use JPA/Hibernate professionally, as a decision maker, but I don't think I'm in either camp entirely. ORMs aren't a magic wand, but they do help you standardize the boilerplate that you'd end up with one way or the other, in most cases.

0 comments

tailspin20193y ago

I definitely see that, and ORMs (particularly older ones) have historically made it easy to shoot yourself in the foot.

But, everything is an abstraction, and I tend to think that if you use any abstraction, you need to have at least a little bit of knowledge about what’s happening in the layer beneath it.

So using an ORM will not be an optimal experience if you don’t know how the underlying RDBMS works.

And effectively using an RDBMS directly still requires a bit of knowledge about the layer below that level of abstraction too (eg how underlying query optimisation works etc).

It’s possible to implement both incorrectly and get bad results and the opposite is true too

ljm3y ago

Agreed, and there's a lot you can gain from an ORM/query builder just in terms of ergonomics or niceness for the 80% use-case.

Doing intensive string manipulation to put your query together becomes painful, fast, especially when you're dealing with optional parts like ordering, limiting, filtering, pagination, etc. It's also incredibly easy to slip in an injection vulnerability as you do that (especially if you're new to programming).

Just don't use it as a crutch because the declarative nature of SQL is vastly more powerful than an imperative wrapper and you'll be at a loss for only knowing the conventions and opinions of your ORM of choice.

j / k navigate · click thread line to collapse