I want to merge features of a vector layer into one single feature using the python console. Somewhere I found the following solution. However it does not seem to work for me. When I execute the following code in the python console
layer = iface.activeLayer() geoms = QgsGeometry.fromWkt('GEOMETRYCOLLECTION EMPTY') for feature in layer.getFeatures(): geoms = geoms.combine(feature.geometry())
I get the error:
Traceback (most recent call last): File "<input>", line 2, in <module> AttributeError: 'NoneType' object has no attribute 'combine'
What went wrong ? Or how to do it differently with python ?