query-model

Query Revit Model

Write a Dynamo Python script to query the Revit model for:

"$ARGUMENTS"

Read-only query script template

No transaction needed — this script only reads data, it doesn't modify the model.

import clr
clr.AddReference('RevitServices')
from RevitServices.Persistence import DocumentManager
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

doc = DocumentManager.Instance.CurrentDBDocument

try:
    # ── Build a filtered element collector ──────────────────────────────────
    # Modify the category or class filter to match what you need:
    collector = (FilteredElementCollector(doc)
                 .OfCategory(BuiltInCategory.OST_Walls)   # ← change category
                 .WhereElementIsNotElementType()
                 .ToElements())

    # ── Extract data from each element ──────────────────────────────────────
    results = []
    for el in collector:
        try:
            row = {
                'Id':       el.Id.IntegerValue,
                'Name':     el.Name if hasattr(el, 'Name') else 'N/A',
                'Category': el.Category.Name if el.Category else 'N/A',
                # Add more fields here, e.g.:
                # 'Mark': el.get_Parameter(BuiltInParameter.ALL_MODEL_MARK).AsString(),
                # 'Type': doc.GetElement(el.GetTypeId()).Name,
            }
            results.append(row)
        except Exception as row_e:
            results.append({'Id': el.Id.IntegerValue, 'Error': str(row_e)})

    OUT = results

except Exception as e:
    import traceback
    OUT = 'ERROR: ' + str(e) + '\n' + traceback.format_exc()

Common collector patterns

Filter by parameter value:

matching = [el for el in collector
            if el.LookupParameter('Fire Rating')
            and el.LookupParameter('Fire Rating').AsString() == '2HR']

Filter elements on a specific level:

from Autodesk.Revit.DB import ElementLevelFilter, ElementId
level_id = ElementId(12345)  # get this from LookupTable or Dynamo input
level_filter = ElementLevelFilter(level_id)
collector.WherePasses(level_filter)