Is there a way to insert a new row into an existing webform from within an magic etl?
Currently, there isn't a simple way to do this within the UI. You can utilize the Java CLI to export the dataflow definition using the list-dataflow and save it to a file. Then change the output dataset ID to your web form's ID in the file. You can then use the set-dataflow-properties command with the -d flag to update the dataflow definition with your updated file.
list-dataflow
set-dataflow-properties
Make sure to keep a copy of the original file in case you have issues with updating the definition.
Thank you Grant for the great suggestion. I know Javascript so I will give it a try.