Support Forums: Message List - Hibernate3 Filters

Re: Side effects of using Filters

Wed, 10 Jan 2007 18:32:25 -0500

I used filters to implement an historical database (as per the example in the Hibernate manual). I had various issues, matching what you have described - and ended up having to alter two Hibernate classes to actually get the thing to allow non-eager...

Side effects of using Filters

Tue, 19 Jul 2005 11:46:51 -0400

Tested on Hibernate 3.0.5

Be careful with filters and caches. First, if you use eager fetching somewhere you need to activate the filter before the eager fetching happens. That's somehow logical since the filters extend the SQL select statement....

Guys, Hibernate is about relational databases

Wed, 18 Aug 2004 02:12:02 -0400

Heh, oops, there were two Michaels in the thread, I thought it was a reply aimed at Mr. Gloegl. Sorry Dmitriy!

No probs, Gavin.

Yep in releational model is different but Hibernate is O/R mapping tool which tries to map...

?

Tue, 17 Aug 2004 09:47:53 -0400

Um. I just wasted half an hour typing up what I assumed was a thoughtful and helpful reply to your questions.

I won't bother again.

blah blah

Tue, 17 Aug 2004 09:35:38 -0400

Yeah, whatever. Goodbye TSS. Get a moderation system.

blah blah

Tue, 17 Aug 2004 09:28:13 -0400

Gavin,

My object model is insance because I do not want dependencies between packages?

I guarantee you, that whenever you write a persistent domain model like this, you will later on come along and change it to add a backreference...

blah blah

Tue, 17 Aug 2004 08:15:33 -0400
If I understand it right, there really are 2 solutions to this: either you set your FK as nullable in your relational model, or you make the relationship navigable both ways in your object model. I would obviously prefer the second option, since...

blah blah

Tue, 17 Aug 2004 01:22:25 -0400
So, I guess, my answer is: I could implement this but

(1) it would probably be a performance bug in some circumstances
(2) if I implemented it, people would probably try to use it, which would be a bad thing

So I don't want to.

blah blah

Tue, 17 Aug 2004 01:14:17 -0400
I understand that you *really* need to think this one through to understand it, and its one I've never quite been able to explain in text. First of all, you need to understand that Hibernate is very different to some other solutions in that it supports...

Hibernate3 Filters

Tue, 17 Aug 2004 01:06:23 -0400

Listen Gringo it why OJB guys have anonymous Fk feature :)
Great feature, it is what every full ORM does and I wouldn't write pages about, because it is implied and expected. There is nothing about your particular problem in...

Hibernate3 Filters

Tue, 17 Aug 2004 00:59:52 -0400
You will get a FK violation exception.

Hibernate3 Filters

Mon, 16 Aug 2004 21:21:36 -0400

solve this first: If you save a B (without any reference to an A), what should be inserted into the FK column?
Nothing should be inserted in the database, instead a foreign key exception should be thrown, since every B should have...

Hibernate3 Filters

Mon, 16 Aug 2004 20:52:04 -0400

If you still insist (don't I remember your name, you keep postings this everywhere you can?) that there is a problem that needs to be solved, solve this first: If you save a B (without any reference to an A), what should be inserted into...

Hibernate3 Filters

Mon, 16 Aug 2004 20:50:11 -0400
You sound nervous and hysteric, take it easy :) I just posted my opinion and you started to scream, roflmao :). You remind me Cocobase fame Ward Mullins :).

I do know that by making key nullable it will work. But nullable key means that child...

Hibernate3 Filters

Mon, 16 Aug 2004 14:48:26 -0400
This obviously wrong view pops up from time to time. We have an explanation in the FAQ, the book, and many postings on the forum. I guess we should add a big NOTE to the reference documentation:

THERE IS NO PROBLEM WITH UNIDIRECTIONAL ONE-TO-MANY...