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Re: ORMs comparisons/complaints. [message #184392 is a reply to message #184325] Mon, 30 December 2013 04:27 Go to previous messageGo to previous message
Arne Vajhøj is currently offline  Arne Vajhøj
Messages: 27
Registered: December 2013
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On 12/23/2013 7:25 AM, Silvio wrote:
> I did several stabs at ORMs in some small toy projects but have mainly
> use ORMs working on existing projects using ORMs (both Hibernate and
> Toplink) that where performing extremely poorly and had become almost
> impossible to maintain and extend. I was then called in to take the ORM
> out of the system as much as possible. This always consisted of creating
> alternative tools for interacting with the RDBMS that the programmers
> could use to rewrite the must critical and/or problematic system parts.

Most places they are actually able to get ORM working.

> So you could say I have mainly negative experiences I could share. To
> put it bluntly: I think ORM is a bad idea in general. I dig OOP for
> modelling the transient behaviour of a running program but find the
> relational model far superior for modelling data. I also find it
> beneficial in general to think of data and programs working on data as
> separate things.
>
> ORM is a mechanism to help you do it the other way around, and a poor
> one at it. If you want to persist objects use an object database or
> serialize to some NoSQL store. If you want structured data in an RDBMS
> don't degrade it into a pile of persisted objects.

I am not quite sure that I can follow you.

If you want OO for the code and you want the relational database,
then you must do a mapping between the two.

You can either hand write a lot of code or use an ORM.

Typical using an ORM is faster because it means less code.

You may not be able to use ORM 100%, but then use it 90% and
hand write code for the remaining 10%.

Arne
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