Ok.. now I am confused what type of inheritance are we talking about...
Horizontal inheritance, the one that I assumed -
http://developer.apple.com/documentation/WebObjects/UsingEOModeler/Art/inh_horizontal.gif,
or vertical inheritance with "flattened" attributes across tables:
http://developer.apple.com/documentation/WebObjects/UsingEOModeler/Art/inh_vertical.gif
Andre, which one do you need?
Andrus
> Andrus,
>
> Would the modeler/etc allow for a table "A" in this case, too? You'd
> want entity B to be composed of tables A&B, entity C composed of tables
> A&C, etc.
>
> Thanks,
>
> /dev/mrg
>
> -----Original Message-----
> From: Andrus Adamchik [mailto:andru..bjectstyle.org]
> Sent: Tuesday, February 01, 2005 9:49 AM
> To: cayenne-use..bjectstyle.org
> Subject: Re: Inheritance using two tables
>
>
> No comments on the timing, but why wouldn't a common abstract superclass
> address your requirements? From what I can tell it provides a *complete*
> functional replacement of multi table inheritance (note that in the
> modeler you can select a superclass of any entity... so two entities can
> have the same custom superclass). E.g.
>
> public abstract class A extends CayenneDataObject {
> public abstract String getX();
> public abstract void setX(Stirng x);
>
> public void doSomething() {
> ...
> }
> }
>
> public class B extends A { // mapped to table B
>
> }
>
> public class C extends A { // mapped to table C
>
> }
>
> Anything I might be missing here?
>
> Andrus
>
>
>
>
>> Andrus Adamchik wrote:
>>
>>>Hi Andre,
>>>
>>>Multiple table inheritance is currently not supported. It should be
>>> fairly easy to add, but this has to be done... I guess you'll have to
>>> map your tables as independent entities and use a common Java
> interface
>>> or better - a common abstract superclass to achieve a similar effect.
>>>
>>>Andrus
>>>
>>>
>> Andrus,
>>
>> Thank you for quick reply.
>>
>> I am stuck with our existing design, guess I'll have to wait for the
>> next cayenne version :)
>>
>> Anybody any idea when/if this feature will be added?
>>
>> cheers
>>
>> Andre
>>
>>>>Hi
>>>>
>>>>How does one map an associated database schema?
>>>>Where we have one base table representing the super class and any
>>>> number
>>>> of other tables representing the concrete sub classes.
>>>>
>>>>I understand the documentation of single table inheritance but can't
>>>> find any help on the above.
>>>>
>>>>Also I can't search the mail archive, am I missing something?
>>>>
>>>>cheers
>>>>
>>>>as
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