Knowing if an object has Custom Attributes

[Anonymous]

Hi,
I've been having this problem at my job where I need to go through a scene's objects and check if they have a custom attribute on them. Whenever you try to access one of the C.A properties of an object that has no C.A applied , it returns an error.

Thus the solution for now is to do a try()catch(). But on a large group of objects , the UI (dotnet) becomes slow because of that check. When I did put that checkup part under comments,
the process was much faster.

So the question is: Is there a way to ask to an object if it has been assigned with a specified custom attribute. Returning a true / false , an empty list or whatever! As long as it's not an error!

Thanks in advance!

[Steve_Curley]

custAttributes.count <obj> maybe?

[Anonymous]

Also can test for concrete property using isProperty() function

for obj in objects where isProperty obj #roundness do ...

[Anonymous]

I believe isProperty is just a wrapper for try/catch, it takes the same amount of time to execute as try/catch if the result is false.

[Anonymous]

yep, i not tested it runtime before and i see some sense in this conclusion.

custAttributes.count looks enough if the scene has only one attribute, else - need to test their names. maybe this snippet looks more promising:

for obj in objects where custAttributes.count obj > 0 do (
   objCAsNames = for ca in (custAttributes.getDefs obj) collect ca.name
   if findItem objCAsNames #CA_Name_Here > 0 do (
      -- ...
   )
)

[Anonymous]

Thanks alot guys, looks like i haven't been enough through the help files or haven't it done properly. This last solution works perfectly well, very apreciated!

See ya!