Adding a custom column on QSqlTableModel for QTableView

here is what i want to appear on my QTableView

col1 col2 cus1
r1
r2
r3
..

cus1 will be my custom column and i want to put some text or notes on it. col1 and col2 are columns from the database and it will be automatically populated.

Ive been reading on how to add virtual columns they say that it can be done by using QProxyModel.I checked the documentation and found out that it's "obsolete".

What alternatives do i have and where should i start?

via Chebli Mohamed