In a script I’m working on I am looking to filter to all linked elements with a valid parameter value. In the Revit UI, the way I do this is by specifying two filters. Unfortunately one of them is not available as a node.
“Parameter has value” AND “Parameter value != “““ (empty string)
This will grab any elements with a string parameter value that’s been specified and avoid ones who had a parameter value that was later blanked out. In other syntaxes, we might say
ParameterString != null AND ParameterString.Length > 0.
for Not Equals, I could use a blank panel. But for equals, I dont want to match against a specific text, I want to catch any and all values that are input. In my usecase, I am looking to gather all elements for which a parameter has been set to a value (any value)
Following up so this thread has an answer. Yes, this is what I needed to do. I was hoping to avoid this since I had ~20k elements and only ~500 of them had values. Extracting the 19k blank values has a performance hit. I rebuilt the same code in Dynamo python and didn’t see much of a performance difference, so I’m not too bothered by this method. It would still be nice, but not necessary to expose the full ‘filter’ API.
