Dear All, I am new to the forum and trying to set up Filter Rules using FilterRule.ByRuleType and ParameterFilterElement.ByRules. However, the list of the rules I created is using “AND” by default. How to change to “OR”? Please see the attached images.
I am also looking for a way to do this. Anyone know a way?
Maybe take a look at:
ParameterFilterElement.SetRules() → ParameterFilterElement.SetElementFilter() – The new function sets the ParameterFilterElement to contain an ElementFilter representing the combination of filter rules.
I don’t think any packages have this yet, so you may need python?
There is also this. (I’m currently testing this out)
- ParameterFilterElement.Create(Document, String, ICollection, IList) → ParameterFilterElement.Create(Document, String, ICollection, ElementFilter) – The ElementFilter input now specifies the filtering rules. This allows combinations of filter rules using logical AND and OR operations. The ElementFilter must be either an ElementParameterFilter or an ElementLogicalFilter containing only ElementParameterFilters and other ElementLogicalFilters.
@Matt_Fleming Thanks, I will look into this as well.
@erfajo I wonder if this could possibly be something that you could roll into Orchid if you have time. 
I’ve done this using Python in Dynamo.
To create a Revit Filter (Parameter Filter Element) you need an ICollection of the categories the filter will apply to and an ElementParameterFilter. The Construction of the Element Parameter Filter is the most confusing part because you can construct ElementParameterFilters our of other previously constructed ElementParameterFilters.
To try to show this I’ll make a filter that works on Framing and Columns and test for either Comments Equals “Magnum” OR (Family Name Begins With “Blue” AND Comments Equals “Steel”)
import clr
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
import System
from System.Collections.Generic import *
from System.Collections.Generic import List
doc=DocumentManager.Instance.CurrentDBDocument
app=DocumentManager.Instance.CurrentUIApplication.Application
First construct an ICollection of StructuralFraming and Structural Column Categories:
beamcolumncatlist=[]
beamcolumncatlist.Add(ElementId(BuiltInCategory.OST_StructuralFraming))
beamcolumncatlist.Add(ElementId(BuiltInCategory.OST_StructuralColumns))
iCollBeamColumnCats=List[ElementId](beamcolumncatlist)
Next get the parameters you will be testing on (in this case the Comments parameter and the Family Name):
pComment=ParameterValueProvider(ElementId(BuiltInParameter.ALL_MODEL_INSTANCE_COMMENTS))
pFamName=ParameterValueProvider(ElementId(BuiltInParameter.ALL_MODEL_FAMILY_NAME))
Next construct the Filter Rules/Tests on those parameters:
xFamName=FilterStringRule(pFamName,FilterStringBeginsWith(),"Blue",False)
xCommSteel=FilterStringRule(pComment,FilterStringEquals(),"Steel",False)
xCommMagnum=FilterStringRule(pComment,FilterStringEquals(),"Magnum",False)
Now construct the actual filter (ParameterFilterElement) - note that this must occur inside a transaction:
TransactionManager.Instance.EnsureInTransaction(doc)
##Make an ICollection of the “Blue” and “Steel” filter tests, then use that ICollection to construct an AND filter set.
beamcolumnfilt1=[]
beamcolumnfilt1.Add(ElementParameterFilter(xFamName))
beamcolumnfilt1.Add(ElementParameterFilter(xCommSteel))
icolbeamcolumnfilt1=List[ElementFilter](beamcolumnfilt1)
andbeamcolumnfilt1=LogicalAndFilter(icolbeamcolumnfilt1)
##Now make an ICollection of the “Magnum” tests and the previous AND of “Blue”+“Steel”, then use that ICollection to construct an OR filter set.
beamcolumnfilt2=[]
beamcolumnfilt2.Add(ElementParameterFilter(xCommMagnum))
beamcolumnfilt2.Add(andbeamcolumnfilt1)
icolbeamcolumnfilt2=List[ElementFilter](beamcolumnfilt2)
orbeamcolumnfilt2=LogicalOrFilter(icolbeamcolumnfilt2)
##Now construct a ParameterFilterElement called “ZoolanderBeamsColumns” using the previously defined beam and column category ICollection and the OR ElementParameterFilter.
pfebeamcolelem=ParameterFilterElement.Create(doc,"ZoolanderBeamsColumns",iCollBeamColumnCats,orbeamcolumnfilt2)
TransactionManager.Instance.TransactionTaskDone()
Hope this helps.
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Hi all, Read the below, unfortunately am not yet at Python stage of my learning.
I have the opposite issue which is strange, When I use “FilterFule.ByRuleType” in Revit 2020 all Filters Default to “OR (Any rule may be true)” instead of “AND(All rules must be true)”
Of course the below does not work, (Put it in as a joke 
) but I’m just hoping the “FilterRule.ByRuleType” gets updated as this is a super handy Node. We use it to auto-generate loads filters based on Parameters in the model.
This is already asked here: