Chris Williams wrote:
>
> as far as both our database and mapping.xml is concerned, no. how would one
> make sure the relationship is bi-directional? i assume you are talking
> about at the castor level.
>
> on 1/8/02 12:52 AM, Thomas Yip at [EMAIL PROTECTED] wrote:
>
> >
> >
> > Is the relationship a bi-directional relationship.
> > Otherwise, make sure it is.
Chris,
There are two types of relationships in most object persistence tools,
uni-directional and bi-directional. A uni-directional relation is one
which objectA makes reference to objectB, but objectB does not make
reference to objectA. A bi-directional relation is just the opposite -
objectA refers to objectB and objectB refers to objectA.
In most situations, Castor requires that relations be mapped as
bi-directional. To do so, make sure that both sets of objects have
references to each other. For example, if objectA has a one-to-many
relation to objectB, objectB must have a many-to-one relation back to
objectA.
Bruce
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