This feature could be more visible, I didn't know about it either. It's not terribly intuitive to look under Metadata extensions -> FieldExtensions to find it.
In any event it sounds like this is what you were looking for JayaPrakash, let us know how it goes.. -mike On Fri, May 22, 2009 at 12:55 AM, Pinaki Poddar <[email protected]> wrote: > > Hi, > > Is it possible to delete a child from an object tree while merging the > whole object? > Yes. > > The feature you describe is often called 'orphan delete'. > > Please note that you have to annotate the Parent container with > @ElementDependent to really delete the child from that database. Something > like > @OneToMany(mappedBy="parent") > @ElementDependent > private List<Child> children; > > > @ElementDependent is a OpenJPA specific extension. Otherwise, Parent-Child > relation will not exist, but the Child record will still remain in the > database. This is natural because in Java, the relations represent > association, not ownership. > > > > JayaPrakash wrote: > > > > Hi, > > > > Is it possible to delete a child from an object tree while > > merging the whole object? > > > > For example I have an Order and a LineItem objects, and the Order has a > > onetomany relationship with LineItem. The Order has 5 LineItem objects > and > > want to delete one of the LineItem objects when I do > > em.merge(lineItem); > > > > To accomplish this what I would like to do is, while I send the Order > > object to my DAO class, I would send only 4 LineItems in the list > > eliminating the 1 LineItem which I wanted to be deleted from the > Database. > > > > Can anyone let me know pls, if this kind of deletion is supported by > > OpenJPA? > > > > I appreciate everybody for taking a look at my post. > > > > > > Thanks, > > JP > > > > > ----- > Pinaki Poddar http://ppoddar.blogspot.com/ > > http://www.linkedin.com/in/pinakipoddar > OpenJPA PMC Member/Committer > JPA Expert Group Member > -- > View this message in context: > http://n2.nabble.com/Child-object-deletion-from-tree-tp2905011p2955835.html > Sent from the OpenJPA Developers mailing list archive at Nabble.com. > >
