I am trying to get the Field Calculator on QGIS to create an autoID and I am using this expression
'5EL_' ||@row_number
It works in the preview, but when executed the field is blank.
How do I fix this?
I have also tried
'5EL_' ||$id
but for some reason I am getting -x
for the id part e.g. 5EL_-32
with the next feature drawn being 5EL_-33
.