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How to make a <many-to-one> null if id is zero

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laug

Post subject: How to make a <many-to-one> null if id is zero

Posted: Fri Nov 04, 2005 11:46 am

Newbie

Joined: Fri Nov 04, 2005 11:40 am
Posts: 1

Hi,

I have a many-to-one mapping:
<many-to-one name="abc" column="abc_id" class="z.z.Abc"/>

Currently, if an entry has value 0 in column abc_id, as I have no Abc object whose id is 0, I get a UnresolvableObjectException: No row with the given identifier exists: 0.

What I would like is for my object's property's value to be null when the abc_id is 0.

Is this possible?

Thanks.

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ernst_pluess

Post subject:

Posted: Sat Nov 05, 2005 6:14 am

Expert

Joined: Thu Jan 29, 2004 2:31 am
Posts: 362
Location: Switzerland, Bern

Generally having 0 instead of NULL is a bad idea and will give you proglems in a lot of places. If you have a chance to change your 0 into NULL it's a very good idea to do so.

If you can't change it try to map the referencing property with

Code:

<many-to-one
     not-found="ignore
     ...

HTH
Ernst

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