At first I had my graph setup to open the title block in the background so that I could get all of the types of the nested stamp family. The graph didn’t work because the stamp’s element ID number could not be recognized in the project, which makes sense since it didn’t exist in the project. So I loaded the stamp into the project to test my theory and the graph worked!
Now I’m going to make the graph load the stamp into the project, set the drawing status stamp type parameter for the selected title blocks, and then remove the stamp from the project.
Can you show us how you were originally attempting to select the family type value from the title block? If the family types exist in the TB then you shouldn’t have to load them separately into the project. Does it work manually?
Maybe that’s the issue, I never attempted to get the available family type parameter values from the title block itself. I’m unsure how to do that. Yes the family works manually without dynamo.
The family type is available since it’s part of the family. You just have to figure out where to pull it from since it doesn’t exist as a “loadable family” in the project. You could always tie the Family Type selection to another parameter that you could more easily control.
A type dropdown parameter would work, which could also be set via Dynamo. Sounds like the TB family might need an update for it, but we’d need to have the family shared somewhere where it can be accessed to confirm.
Looks about right to me… Shoule be able to set the parameter value once loaded. I believe they take element IDs, but can’t recall.
Try getting the parameter value for a random sampling and see what the values are. Push comes to shove you can make the nested family shared to ensure you can grab the element id from the list of loadable types.
I think it does need to be a nested family unfortunately. I haven’t been able to return a list of existing NestedFamilyTypeReferences so far.
EDIT: Finally got it. The family types do not have to be from a nested family. You just have to specify the specific family type parameter that controls the embedded family. (Which may be instance or type based.)
import sys
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
inst = UnwrapElement(IN[0])
param = inst.LookupParameter("Size")
family = inst.Symbol.Family
familyTypeIds = family.GetFamilyTypeParameterValues(param.Id)
familyTypes = [doc.GetElement(typeId) for typeId in familyTypeIds]
OUT = familyTypes
This will return all viable family types, not just the ones defined in the family. If you want to filter down to only the embedded options you can filter those types one more time with: nestedTypes = [familyType for familyType in familyTypes if type(familyType) == NestedFamilyTypeReference]
I’m not using the “Select Model Element” node to get the Title Block instance though. I’m having the user select the sheets they want the stamp (nested familytype) to show on. Then I’m using the “Sheet_Titleblock” node to convert the selected sheets to the title block instances on those sheets.
The error explains what’s going on. You’re providing a list of elements but the code is written for a single element. You’ll have to add another level to loop through the list.
I was able to make your code work on a single selected element. Thank you!
How do I go about adding another level to loop through the list? I’m still learning to code and I only started to really get into dynamo this earlier this year.
Start with your inputs, and make the variable names plural (ie: instance becomes instances).
Run the code, and see where the issue is. I’d you see ‘variable ____ does not exist in the current context’ then you need to put a for loop above that, something like ‘for instance in instances’.
Then offset all of the lines which interact with that variable by one tab… in this case it would be everything up to setting the family types.
From there, you just need to make sure that each of the results are added to something containing all the results…
In the line before you started the for loop, define results as an empty list (results =[]).
Then we need to make sure we are putting the stuff we want to return into dynamo into the results list, so at the end of the loop add results.append(familyTypes)
And then finally we need to set the OUT variable to the results list.
Give it a shot and if you get stuck share your formatted code.
import sys
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
instances = UnwrapElement(IN[0])
results =[]
for instance in instances:
param = instance.LookupParameter("DRAWING STATUS STAMP TYPE")
family = instance.Symbol.Family
familyTypeIds = family.GetFamilyTypeParameterValues(param.Id)
familyTypes = [doc.GetElement(typeId) for typeId in familyTypeIds]
nestedTypes = [familyType for familyType in familyTypes if type(familyType) == NestedFamilyTypeReference]
results.append(nestedTypes)
OUT = nestedTypes
But now I have a different issue.
There are a couple of other families nested in the title block that I don’t want the user to be able to select. I tried to filter the list using a code block e.Name to show the names and apparently that changed the values from Element Id to String so now the Element.SetParameterByName node doesn’t work.
Can I filter the unwanted nested families within the python code block?
Are you wanting to filter out the options that aren’t part of the family or even more specific options that exist within the TB already? The extra line I added at the end of my original code comment will filter out the former. If there are specific options you don’t want you can still filter them by name but you need to make sure you’re returning the element still and not the string.
I want to filter out more specific options in the TB, like logos. I suppose I can’t filter out the exact element ids because they could be different in a project where the TB is has been accidently purged and reloaded. How do I filter them by name without turning them into a string?
listOfApprovedNames = ["name1", "name2", "name3"]
familyTypes = [i for i in FamilyTypes if i.Name in listOfApprovedNames]
You can likely guess at where it should go in your code, and how the variables will have to be renamed based on what you had before. Same process as I outlined above.
It might be easier to filter them by Family Name if you’re saying there are other families that aren’t the stamp family you’re specifically looking for.
Thank you @Nick_Boyts & @jacob.small! I really appreciate all the help.
I used your code to filter the Unapproved names with an “if not” and the graph fully works!
Not sure which reply to mark as a solution though. I wish I could mark more than one.
Glad you got it all working. Mark whichever comment you think best answers your initial question. That’s the one people searching similar questions will be looking for.
