[gme-users] single fixed model
Nicki Lehmann Møller
nicki at itu.dk
Fri Sep 15 11:36:41 CDT 2006
Thank you for your quick reply.
On 9/14/06, Zoltan Molnar <zolmol at isis.vanderbilt.edu> wrote:
> Yes, a constraint could do it and i believe is the way to do it, because
> no other mechanism could check so simply and effectively..
> Like this one:
> let t1 = project.allInstancesOf( meta::MyModel)->size in t1 = 1
> This constraint can be attached to any object in your metamodel, it will
> still count the total number of MyModels in the whole project.
> Yet if you attach it to MyModel, and set its priority to 1, and you set
> the On Create or On New Child events to fire the constr. it will prevent
> realtime users from creating 2 instances.
> br, Zoli
> -----Original Message-----
> *From:* gme-users-bounces at list.isis.vanderbilt.edu [mailto:
> gme-users-bounces at list.isis.vanderbilt.edu] *On Behalf Of *Nicki Lehmann
> *Sent:* Wednesday, September 13, 2006 3:39 AM
> *To:* gme-users
> *Subject:* [gme-users] single fixed model
> Hi All!
> Here is a hopefully very simple question that I however haven't found the
> answer for yet :(
> How should a single fixed model (singleton model object like Santa :-)) be
> created. I know this could be done using cardinality and constraints, but is
> this the correct way to do it?
> Kind Regards,
> gme-users mailing list
> gme-users at list.isis.vanderbilt.edu
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