I would like to know, how I can see the code behind a attribute field in the attribute table of a shapefile layer in QGIS 3.16.
I have created a new data column with a specific code used in the field calculator. However, now I want to copy that code and use it for creating a new field in another layer.
QGIS Field Calculator – How to Copy Field Expression in QGIS Field Calculator
expressionfield-calculatorqgis
Related Solutions
If you want to add an integer field, you should replace:
QVariant.Double
with
QVariant.Int
If your field from the csv is already joined to your shapefile, you could try using:
with edit(join_layer):
for feature in join_layer.getFeatures():
feature.setAttribute(feature.fieldNameIndex('PatCNT'), feature['Patient_Data_PatientCount'])
join_layer.updateFeature(feature)
overlay_within returns Sektor value of the related polygon feature(s) as a list/array (even if it returns one polygon). You should convert to string.
Set Output field type to Text and use this expression:
array_to_string(overlay_within('Sektorplan', Sektor))
Best Answer
You can't see which expression was used to create/change a field via the attribute table. But you may expand the
latestdropdown in the field calculator where the last 10 to 20 expressions you used are listed.