Data Model Design Q: Translation
Data Model Design Q: Translation
- Subject: Data Model Design Q: Translation
- From: Ben Lachman <email@hidden>
- Date: Tue, 11 Jul 2006 16:38:10 -0400
I'm wondering how to design my data model so that I can include a
substitution/translation object in my model. Basically I want an
object that says 3 of this thing is equal to 4 of that thing, where
the things are of the same class. A basic example would be
substituting change: 5 pennies are equal to 1 nickel, 4 nickels are
equal to 2 dimes, etc. The inverse of these is always true as well.
This makes sense and seems pretty simple, but I can't figure out a
decent way of doing this within the xcode data modeler. What I'd
like is something like this:
[ Coin ] <---->> [ Substitution ] <<----> [ Coin ]
where [ Coin ] has a substitutions to-many relationship and
[ Substitution ] has a pair of amounts (5 and 1 for instance) and
relationships (to the nickel and penny coin objects).
Does anyone have an idea of how to do this in xcode?
Thanks,
->Ben
--
The user's going to pick dancing pigs over security every time. —
Bruce Schneier
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