I have a line layer representing transport routes.
I would like to add a virtual layer listing every city crossed by each line. I would only need the id of each city to be listed (column
The result should be
Line 1 | 12001, 12003, 12122| Line 2 | 23001, 23002, 23004, 23120,23012| etc.
This question is linked to the solution proposed in this topic: Automatic calculation field based on line modification within QGIS