How to add "Parameter Exists" filter to schedule?

Revit
,
1

I am able to add other filters using the same nodes and inputs without issue, but “Has Parameter” (Parameter exists, in Revit’s schedule) returns an error: “Filter value is not valid for the field and filter type”

The parameter in question is a shared text parameter, if that matters.

Anyone have experience adding Parameter Exists filters using dynamo?

Screenshot_10
Screenshot_102680×1100 179 KB

2

Hi Devlyn, welcome :wave:
The API docs note the following

‘The element has the parameter specified by the field. Used with shared parameters. No value is specified for this filter type.’

However - I think this is a source code issue as the constructor for the filter does not consider the case for HasParameter, HasValue, HasNoValue where there is no value input as this returns a function from the node. Further if you try null or "" or 0.0 it still errors. An ElementId.InvalidElementId and Int64 0 didn’t even make it as they could not be cast to a Dynamo element

tl;dr It’s not working at a code level

I will put in a new issue at the GitHub repo to get this reviewed

3

Here’s some code to get you across the gap - please note there is also an issue with the SheduleFilter.ByFieldTypeAndValue with integers
Edit: Hot tip! Use in manual mode, otherwise it will add multiple filters

schedule_filters
schedule_filters2266×540 56.1 KB

import clr

clr.AddReference("RevitNodes")
import Revit

clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference("RevitAPI")
from Autodesk.Revit.DB import *

from System import Int32, Int64


def to_list(items):
    if isinstance(items, list):
        return items
    return [items]


doc = DocumentManager.Instance.CurrentDBDocument

schedule_view = UnwrapElement(IN[0])
schedule_filters = to_list(IN[1])

TransactionManager.Instance.EnsureInTransaction(doc)

for sf in schedule_filters:
    new_sf = ScheduleFilter(ScheduleFieldId(sf.FiledId), eval("ScheduleFilterType." + sf.FilterType))
    value = sf.Value
    
    if sf.FilterType in ["HasNoValue", "HasParameter", "HasValue"]:
        new_sf.SetNullValue()
        
    elif isinstance(value, (int, Int32, Int64)):
        new_sf.SetValue(Int32(value))
        
    elif isinstance(value, str):
        new_sf.SetValue(value)
        
    elif isinstance(value, Revit.Elements.Element):
        new_sf.SetValue(UnwrapElement(value).Id)
        
    else:
        continue
    
    schedule_view.Definition.AddFilter(new_sf)

TransactionManager.Instance.TransactionTaskDone()

OUT = schedule_view
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