How can I properly implement QSortFilterProxyModel.parent to handle a virtual column?

[Unai]

Thanks @d_stranz! Sorry for posting twice— I was a bit confused as I didn’t read the auto-closing pop-up the first time, which said a mod would need to approve it as I’m new here, so it’s all fine

Just realised that I’m constantly getting ‘Can't select indexes from different model or with different parents’ messages and it’s not letting me select any file, so I’m definitely doing something wrong