Modify Rule Based Filters

Revit
1

Hello!
Here is the problem I am trying to solve. A user created Rule-based Filters named ID LO-XX2 and the filter rule is ID does not contain LO-XX2. There’s a lot of these. The LO was supposed to be L0 (Level Zero not Level Letter O). I was able to write a dynamo script to rename the Filter by replacing the LO to L0, but cannot figure out how to modify the Filter Rule String itself. I don’t want to Create new filters, because there are about 50 views with these already applied to.
I wanted to do a two part process basically. If Filter Rule String contains LO- replace it with L0-. Then run the Dynamo Script that renames the Filter rules.
Thoughts?

2

since u’ve already grabbed filter elements and renamed them, worth trying is to SetRules while u’re at it. SetRules Method

3

Thank you. I guess I am not sure how to do that. I am really new to Dynamo and have been using nodes that already exist. So not sure how to use the API documents yet.

4

aite lets tinker around a bit, see if it’s doable. also there might be a node-only approach that i don’t even konw.

5

@michellel I stared at this filter and that filter for a full hour, not fun :face_with_bags_under_eyes:, not to mention the document link I posted was from 2019 and already outdated. anyway, i found a workable solution (code-only) which might be a lot to take in. however, if u ever want to give it a try, u could refer to this. tbh, there might be a simpler approach, worthing diggin deeper into the doc.

doc = DocumentManager.Instance.CurrentDBDocument
uidoc=DocumentManager.Instance.CurrentUIApplication.ActiveUIDocument

# grab the ParameterFilterElements with "LO" in their names
v_filters = FilteredElementCollector(doc).OfClass(ParameterFilterElement).ToElements()
v_filters = list(filter(lambda f: "LO" in f.Name, v_filters))

#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)

for f in v_filters: # ParameterFilterElement
    e_filter = f.GetElementFilter() # ElementFilter -> ElementLogicalFilter -> LogicalAndFilter
    e_param_filter = e_filter.GetFilters()[0] # ElementParameterFilter
    
    rule = e_param_filter.GetRules()[0] # FilterRules, returns a set of copies
    rule.RuleString = "Placeholder" # still, a copy
    
    # make a new ElementParameterFilter with the modified copy
    new_e_param_filter = ElementParameterFilter(List[FilterRule]([rule]))
    
    f.SetElementFilter(new_e_param_filter) # update the ParameterFilterElement
    f.Name = f.Name.replace("LO", "L0") # update the filter name

TransactionManager.Instance.TransactionTaskDone()

essentially, u could start with a filter then get logical filter → parameter filter → rules (copy) → make new rules → make new parameter filter → set new filter onto the filter → rename the filter (which u’ve already done with nodes)

before running:

pre
pre1614×522 39.5 KB

after:

post
post1626×383 29.2 KB

my goodness, ‘filter’ is going to haunt my nightmares for a while.

6

Just to clarify, are there multiple filters that need to be modified or multiple views containing a single filter?