RE : Using null value with FK

[Emmanuel Dupont <em...@jwaretechnologies.com>]

It works well Vincent !


-----Message d'origine-----
De : Charles Anthony [mailto:charles.anthony@hpdsoftware.com] 
Envoyé : jeudi 10 juillet 2003 08:36
À : 'OJB Users List'
Objet : RE: Using null value with FK

Hi Vincent,

If the attribute that the column represents is an "int" i.e. the java
primitive, OJB cannot directly assign it a value of null.

The simplest solution for this is to not use primitives as attributes if
they can be null.

If you really want/need to keep the attribute as a primitive, you will have
to use a FieldConversion..... see
http://db.apache.org/ojb/jdbc-types.html for more information. 

Cheers,

Charles.

>-----Original Message-----
>From: Vincent Frison [mailto:turman@ohmforce.com]
>Sent: 09 July 2003 22:30
>To: OJB Users List
>Subject: Using null value with FK
>
>
>Hi,
>
>I've read somewhere in this ML that, since the latest 
>releases, OJB uses
>null values for FK when the referenced object is null. But it doesn't,
>it uses the default 0 value instead (the FK is a int). Note that my FK
>field descriptor is defined with the nullable attribute.
>
>This is really annoying since it isn't compatible with the FK 
>constraint
>of my DB (PostgreSQL). So I guess I've misunderstood a basic concept..
>
>Vincent
>
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