There are several strategies you can use. One option would be to read the row into a separate model and associate this new model with the field editor. On Save, you will need to re-query the relatedShippings model to pick up the changes.
There are several strategies you can use. One option would be to read the row into a separate model and associate this new model with the field editor. On Save, you will need to re-query the relatedShippings model to pick up the changes.