Bug
When using the Data Access module with the UpdateCursor class, row values cannot be updated to null.
| Bug ID Number | BUG-000091314 |
|---|---|
| Submitted | October 9, 2015 |
| Last Modified | June 16, 2025 |
| Applies to | ArcGIS Pro |
| Version found | 1.1 |
| Operating System | N/A |
| Operating System Version | N/A |
| Version Fixed | 3.1 |
| Status | Fixed |
Additional Information
The issue is fixed in the ArcGIS Pro 3.1 release. To protect backward compatibility, the default behavior remains as is, but there is a new keyword argument for da.UpdateCursor and da.InsertCursor to allow explicit overriding of default values with null.Workaround
Use the old update cursor or use the Calculate Field geoprocessing tool.
def workaround0():
rows=arcpy.UpdateCursor(os.path.join(geodatabase, fcName))
for row in rows:
row.intField = None
rows.updateRow(row)
def workaround1():
arcpy.CalculateField_management(os.path.join(geodatabase, fcName), 'thisField', 'getNone()', 'PYTHON_9.3', r'def getNone():\n return None')
Steps to Reproduce
Bug ID: BUG-000091314
Software:
- ArcGIS Pro
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