I'm trying the user-defined expression functions for QGIS, as listed on Nathans blog: http://nathanw.net/2012/11/10/user-defined-expression-functions-for-qgis/
I always get the feature.geometry() as None, when running the user expression in the expression builder updating a text column? This happens for all geometries like point, lines and polygons. The data format is ESRI Shape. The code is in an userfunctions.py referenced from startup.py.
from qgis.utils import qgsfunction from qgis.core import QGis @qgsfunction(0, "Python") def test(values, feature, parent): geom = feature.geometry() if geom is None: return 'geom is None' return 'geom is NOT None'
My text column is updated with the text: 'geom is None'. Why can I not reference the geometry of a feature?