Hi Sabiha,
> if I want to have relationship (to-many) between �Manager� and
> �Developer�, how to implement it?
Actually I haven't tested such case yet, but I don't see why it
wouldn't work... To map such relationship, create a corresponding
self-referencing pair of DbRelationships in Employee *DbEntity*, for
instance called "employees" and "toManager". Then create a new
ObjRelationship in Manager ObjEntity (but not in Employee ObjEntity)
that maps to "employees" DbRelationship.
Let us know how this worked.
> Did I miss something here or did something wrong?
You also need to do some "magic" with your data objects per chapter
8.6.1 buried deep in the user guide:
http://objectstyle.org/cayenne/userguide/dataobjects/dataobjects-
inheritance.html . This step is probably just a temporary thing.
Hopefully in the next releases we will move this information it to the
mapping.
Cheers
Andrus
On Apr 15, 2004, at 9:06 AM, sabiha wrote:
> Hi,
> I�m exploring inheritance in Cayenne and have simple model with
> ObjEntities: �Employee�, �Manager� and �Developer�. (Manager and
> Developer are inherited from Employee).
>
> To implement inheritance I created only DbEntity �Employee� (not
> corresponding DbEntities for inherited ObjEntities) that contains all
> attributes of those classes (ObjEntities). And I have done all needed
> configuration described in Modeler guide: for ObjEntity �Employee� I
> set �Table/View� to be corresponding DbEntity � �Employee� and for
> inherited entities I set �Inheritance� to be �Employee� ObjEntity.
> �And for inherited entities I set corresponding qualifiers: �manager�
> and �developer�.
>
> Did I miss something here or did something wrong?
>
> What my question is: if I want to have relationship (to-many) between
> �Manager� and �Developer�, how to implement it?
>
> Thanks in advance!
>
> Sabiha
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