Hibernate 3.2.5.ga
Annotations 3.3.0.ga
Tools 3.2.0.b9 (on Eclipse 3.3) (couldn't get b11 to work at all...)


Trying to model a basic parent/child structure with cascading load and save.
(http://www.hibernate.org/hib_docs/v3/re ... d-cascades)

Extensive searching through tutorials finds two possible ways:

@OneToMany(fetch = FetchType.LAZY, cascade = javax.persistence.CascadeType.ALL)
@org.hibernate.annotations.Cascade(value = {org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
private List<Project> children;

and

@org.hibernate.annotations.Cascade(value = {org.hibernate.annotations.CascadeType.ALL, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
@CollectionOfElements(fetch = FetchType.LAZY)
private List<Project> children;

Neither of these cases seems to work for me.
A look at the generated (by Hibernate tools) hbm.xml file shows no "cascade" tag. Adding this manually appears to fix it, but since this file is generated, I would prefer not to do this.

Interestingly, if I use a ManyToOne from child to parent with "cascade", it *is* reflected in the generated hbm.xml file...

Is there something fundamentally wrong with my approach?
Or a bug in the tools?


Alternatively, I figured I might be able to modify the cascade value programmatically in the SessionFactory Metadata. However, when I looked at the Metadata in the debugger, the cascading seems to already be properly set!
What gives?
I don't see another generated file that might hold this info anywhere...


Many thanks to anybody who wants to help a newby learn Hibernate,
Scott

I think I figured this out.

1) The Hibernate tools do not generate the correct hbm.xml files.
2) The Hibernate tools do not generate the correct hibernate.cfg.xml file.
It converts "mapping class" to "mapping resource"!
3) The solution is to not have the tools generate these files.
Simply copy the hibernate.cfg.xml (using "mapping class") to the 'bin'
folder. That way, Hibernate will (apparently) use reflection to gather the
annotation parameters rather than the incorrectly generated hbm.xml files.
You just have to remember to do this after every change...