Not directly, but you can emulate that with entity qualifiers by
filtering the generic entity on the value of the column that is not
participating in a join. You can even map that as an inheritance
hierarchy.
Andrus
On Jan 10, 2010, at 4:05 PM, George Stan wrote:
Hi,
Is it possible to map fake foreign keys with CM?
In many DBs for webapps there seem to be quite a few tables (for
entities like Tags, Comments, Attachments, Events) to have
relationships to many other tables, and instead of a FK, a
combination of two fields is used (target_table_name and
target_row_id).
I know that other ORMs (like ActiveRecord from RoR) have this
feature, but I'm not sure about Cayenne.
Thanks in advance,
George.
