optional « Association « JPA Q&A

1. "optional" association    forum.hibernate.org

When there is a 0 in the database I got a exception: net.sf.hibernate.UnresolvableObjectException: No row with the given identifier exists: 0 Because he looks after the primary key 0 in the country tagle, but can't find it. and I want him to load the country, when the id is not 0. Is there a possibility to tell Hibernate, that he just ...

2. Does Hibernate support optional one-to-one associations?    forum.hibernate.org

Hello, I am trying to figure out if Hibernate supports optional one-to-one associations, e.g. Person (0..1) -- (0..1) House and so far am not finding anything. The Hibernate books and reference all talk of two ways of mapping one-to-one associations: 1. using a many-to-one fk association with a unique constraint on the fk; 2. using a pk association. the trouble with ...

3. Newbie: optional one-to-one association    forum.hibernate.org

I've read the docs and searched the forums and can't find an answer to this particular problem I have two entities like.... Code: public class BuildingDesign { .... private int fID; private String fTitle; .... } public class BuildingDesignLock { ... private int ...

4. Optional Association and HQL    forum.hibernate.org

5. Optional Association and HQL    forum.hibernate.org

6. Optional Association and Outer Join    forum.hibernate.org