Get related data from QSqlRelationalTableModel

[qxoz]

Hi everyone!
I have 2 related tables and model which bind them like this:
@tbm_clientList->setRelation(3, QSqlRelation("mt_ctype", "id", "name"));@
and issue is how to get "id" of related data on selected row?

[qxoz]

I found some solution in qtcentre.org
@class mymodel : public QSqlRelationalTableModel
{
Q_OBJECT
public:
virtual QVariant data(const QModelIndex &item, int role = Qt::DisplayRole) const;
virtual QSqlRecord record(int row) const;
};@

@QSqlRecord mymodel::record(int row) const
{
QSqlTableModel mod;
QSqlRecord rec = QSqlQueryModel::record(row);

mod.setTable(tableName());
mod.select();
mod.setFilter(QString("idxxx = %2").arg(rec.value("idxxx").toInt()));

return mod.record(0);

}@

but i think it's expensive solution