On Aug 11, 2009, at 6:21 AM, Gustavo Pizano wrote:
Hello Im doing an eomodel.. .and I have an entity called Area, and
SubArea, for me an area can have many subareas, but subarea its an
area itself also..
so its like Area <- >>SubArea.
If a SubArea is really just an Area with a parent, then I'd just have
one Entity of Area with an optional to-one relationship to parent.
I'd model it as Area <->> Area with Area having a foreign key that
points to the PK. You'll end up with each Area having a parentArea and
multiple subAreas.
This assumes that an Area can have only one parent. If an Area can
have more than one parent, then you'll need a many-to-many join.
Dave
Now what are the implications of defyning Area with its properties,
and then SubArea and put as parent Area?... I see that inside Area
Entity there is SubArea Entity also... but I guess this doesn't
guaranties me the to-many relationship between the 2 entities isn't
it?do I still have t defying the relationship?
Thanks
Gustavo
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