[gme-users] MGAMeta: UsingDefinedFCOs

[Simon Görke]

Indeed casting solved the problem - thanks.

Regards,
Simon

> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu 
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf 
> Of Larry Howard
> Sent: Sunday, March 02, 2008 3:46 PM
> To: A list for GME users to share thoughts and discuss bugs and fixes.
> Subject: Re: [gme-users] MGAMeta: UsingDefinedFCOs
> 
> Simon,
> 
> In general, casting is a good first step when you run into 
> this kind of issue.  No guarantees, just a measure to ensure 
> a particular interpretation of a returned COM pointer type.
> 
> So,
> 
> meta = win32com.client.gencache.GetModuleForProgID("Mga.MgaMetaFCOs")
> 
> rFCOs = project.RootMeta.RootFolder.DefinedFCOs
> for rFCO in rFCOs:
>     print meta.IMgaMetaFCO(rFCO).Name
> 
> works fine for me.
> 
> In searching over a large body of our Python code for GME, I find a  
> significant amount of casting of Meta-related COM pointers.  This is  
> merely an observation from experience, but it bears out the above  
> guidance.
> 
> Regards,
> lph
> --
> Larry Howard, Sr. Research Scientist
> Institute for Software Integrated Systems, Vanderbilt University
> 
> 
> On Mar 2, 2008, at 5:46 AM, Simon Görke wrote:
> 
> > Hello everybody,
> >
> > I have a problem accessing the FCOs of my Meta model from an  
> > interpreter
> > written in Python / COM.
> >
> > While a simple
> >
> > print 
> project.RootMeta.RootFolder.DefinedFCOByName("MetaEntityName",  
> > 1).Name
> >
> > works without problems, using
> >
> > rFCOs = project.RootMeta.RootFolder.DefinedFCOs
> > print rFCOs.Count
> > for rFCO in rFCOs:
> >    print rFCO.Name
> >
> > is not successful. The number of meta entities returned by the  
> > rFCOs.Count
> > seems correct, however I am not able to actually access the FCOs  
> > returned
> > (Python gives me "AttributeError: <unknown>.Name").
> > Within the interpreter, I have to access ALL Meta Entities without  
> > knowing
> > their names, so using the "DefinedFCOs" method seemed to be a good  
> > idea to
> > me.
> >
> > BTW: Using MGA Collections in general does not seem to be 
> part of the
> > problem, as the follwing code snippet is working:
> >
> > FCOs = project.RootFolder.ChildFCOs
> > for FCO in FCOs:
> >    print FCO.Name
> >
> > I really do not know how to go on on and wheather this 
> issue results  
> > from
> > lack of understanding on my side or even a problem in the GME /  
> > Python COM
> > Interface?
> > Any advice is highly appreciated!
> >
> > Thanks,
> > Simon
> >
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> 
>