I am trying to update an existing field on a shapefile using data from another shapefile. Basically, each attribute table contains an ID field that I want to use to update a field called "address".
So far, I have tried to use the processing alg "qgis:joinattributestable" and QgsVectorJoinInfo(). Both of these solutions however seem to create temporary join fields that are of no use to me.
Is this something that is possible with QGIS?