I have this model 'A' that inherits from QAbstractItemModel and provides a reimplemetation of the 'match' method.

This model is 'wrapped' by a QSortFilterProxyModel.

When a keypress event is received in the ItemView that controls the QSortFilterProxyModel the match method gets called
from within the ItemView's event handler.

This calls the proxymodel's match which - by default - calls

QAbstractProxyModel::match(start, role, value, hits, flags); // qsortfilterproxymodel.h line 1971

Since QAbstractProxyModel does not implement a match, the match that gets called is the match as implemented in the
QAbstractItemModel which does what it does.

However My model 'A''s match should be called.

Solution :

implement QAbstractProxyModel::match(..) and call sourceModel()->match().

If no match is implemented, then the QAbstractItemModel's will be called, otherwise the reimplemented version.

Workaround :

Inherit from QSortProxyModel and implement the above solution there.