Loaded Cable Tray Types

I am working on some cable tray automation and I would like to input a specific Cable Tray TypeID into my python script.

As a first try I manually created cable tray instance in Revit to extract the element type using the “Element.type” node. I successfully forward the typeID as an input to the create tray node. The newly created cable try is in fact of the same type as expected. Great!

Next, what I would like to achieve is to select the corresponding Cable Tray Type Name from a list or search for the name in the various existing cable tray types in the project.

Now, if a cable tray of that specific type has already been placed in the project, I can select it using the “All Placed Family Types of Category” with “Cable Trays” as a Category input.

In normal situation I won’t have any cable trays in the model, so I cannot use this method to select the cable tray type. The node “All Family Types Of Category” returns an empty list if no cable trays exist in the model.

I tried using the “FamilyType.ByName” node but it returns the first matching family type which is in this case a cable tray fitting which shares the same type name.

I found this old thread https://forum.dynamobim.com/t/cabletraytype-id/1499 but couldn’t figure out a solution.

Any thoughts on how to accomplish the idea? I know I can always insert a cable tray in Revit to select it in Dynamo and get the typeID, but it doesn’t feel right to me. I could also change the names of all my fittings but that would be time consuming.

Any help is appreciated!

Hi @francescgj
here’s one way to do it:

import clr
import RevitServices
from RevitServices.Persistence import DocumentManager
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Electrical import*
import Revit

doc = DocumentManager.Instance.CurrentDBDocument

collector = FilteredElementCollector(doc).OfClass(CableTrayType)
fn = IN[0]
n = IN[1]
traytype = [x for x in collector if x.FamilyName == fn and x.ToDSType(True).Name == n]

OUT = traytype

Worked like a charm! Thank you very much!