Interesting.
About getmaster(), you don't have to do error catching. It either
return a source model or nothing. ie:
if oObject.type == c.siModelType and xsi.getmaster( oObject ) == None:
# object is an non-instance model
I suppose that knowing in advance the object is a model could make
things even better.
Cheers
Bernard
On Nov 20, 2007 2:08 PM, peter boeykens <peter_b(at)skynet.be> wrote:
>
> I tried the two approaches, cant really spot a performance difference.
>
> both take between 3 and 4 seconds on 1600 instances -
> that is including a logmessage listing the instance and the master.
>
> if tried a complete version in OM (the logic I described below), doing
> several tests, with typename, amount of childs, groups, amount of owner,
> typename of owners, untill all conditions were met for an instance. Ten or
> so lines, about four conditions in there, two "for each" loops.
> then I stripped everything down to the bare minimum, assuming that instances
> were selected, immediately navigating to owners, finding a group in there
> and going to the owner, one "for each" loop and one condition. I was
> surprised to see that it didnt affect the speed noticeably.
> And the command getmaster() was the same speed, however you would have to do
> some error catching for when you run it on something which is no instance.
>
>
>
>
>
> > As far as determining if the model is an instance or a real model,
> > it'd be interesting to see how does your approach performs compred to
> > getmaster().
> >
> >
> > Cheers
> > Bernard
> >
> >
> >
> > On Nov 20, 2007 4:27 AM, peter boeykens <peter_b(at)skynet.be> wrote:
> >> > I never thought of checking the instance group. This returns the group
> >> > under the source model, so I guess checking the parent of that group
> >> > will return the source model of the instance. Nice one.
> >> >
> >> > Cheers
> >> > Bernard
> >>
> >>
> >> tried it out and got it to work, something like this:
> >>
> >> test if its a model with .type
> >> if it is, find childs and groups,
> >> if both their counts are at 0,
> >> find the owners
> >> for each owner
> >> test if its a group
> >> if so, test the owner of the group
> >> if its a pass: bingo! we have an
> >> instance.
> >> if it's a model: this is the master
> >> object.
> >>
> >> its a totally OM way, ran it on a hundred instances in almost no time.
> >>
> >>
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