Thomas Louis wrote:
>
> Hello Keith,
>
> > Hi Thomas,
> >
> > I couldn't figure out if you are trying to use the Unmarshalling to fill
> > the parent field...
> >
> > if so:
> >
> > You have to mark the 'parent' field as a reference and change the node
> > type to attribute:
> >
> > ...
> > <field name="parent" type="Parent" reference="true">
> > <sql name="parent_id"/>
> > <bind-xml name="parent" node="attribute"/>
> > </field>
> > ...
> >
> > the XML representation must also be an attribute containing the id of
> > the parent,
> > as such:
> >
> > <parent id="x">
> > <child parent="x">one</child>
> > <child parent="x">two</child>
> > </parent>
>
> Exactly this is, what I tried to prepend. I think XML has a tree-structure
> to say <child> is a child of <parent> if it is a subelement. So why does
> castor not have a possibility to define a backreference to a parent-element
> if one specify this in the mapping file. How to take Data from XML to SQL
> else?
>
Castor has no way to "magically" guess that you want to put a copy of
the parent inside the child. So you can either use the approach I
suggested above which explicitly expresses your desires, or you can
handle the back-reference very easily yourself in your add/set method:
public void addChild(Child child) {
...
child.setParent(this);
}
--Keith
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