[odb-users] Composite pattern (not composite value) with extra pointer to a child

[Alexandre Pretyman]

Thank you Boris and sorry about the noise.

On 16 March 2015 at 09:23, Boris Kolpackov <boris at codesynthesis.com> wrote:

> Hi Alexandre,
>
> Alexandre Pretyman <alexandre.pretyman at gmail.com> writes:
>
> > So it seems that for this scenario odb must be part of wiring of
> > the object pointers.
>
> Quoting from Chapter 6, "Relationships":
>
> "When persisting or updating an object containing a pointer to another
> object,
>  the pointed-to object must have a valid object id. This, however, may not
>  always be easy to achieve in complex relationships that involve objects
> with
>  automatically assigned identifiers. In such cases it may be necessary to
>  first persist an object with a pointer set to NULL and then, once the
>  pointed-to object is made persistent and its identifier assigned, set the
>  pointer to the correct value and update the object in the database."
>
> Boris
>



-- 
Alexandre Pretyman