Select specific item in QListView

[Cerberus]

I have a QListView which contents I said with a Model. When resetting the model I need to reselect the previous item but I'm not sure how to search for it and than select it.
This is how I set the model:

void IMClientGui::setActiveUsers(QSqlQueryModel *sqm) {
    QString currentUser = this->getSelectedHost();
    ui->clientsOnline->setModel(sqm);
    //here the old selection should be reset if this entry is still in the list
}
 
QString IMClientGui::getSelectedHost() {
    auto itemselectmodel = ui->clientsOnline->selectionModel();
 
    if (itemselectmodel->selectedIndexes().size() > 0) {
        QModelIndex index = itemselectmodel->selectedIndexes().at(0);
        return index.data().toString();
    } else
        return "";
}

void IMClientGui::setActiveUsers(QSqlQueryModel *sqm) {
    QString currentUser = this->getSelectedHost();
    ui->clientsOnline->setModel(sqm);
    //here the old selection should be reset if this entry is still in the list
}

QString IMClientGui::getSelectedHost() {
    auto itemselectmodel = ui->clientsOnline->selectionModel();

    if (itemselectmodel->selectedIndexes().size() > 0) {
        QModelIndex index = itemselectmodel->selectedIndexes().at(0);
        return index.data().toString();
    } else
        return "";
}

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I cannot work with the indexes here (e.g. if item with index 3 was selected reset to index 3) since a previous item might have been removed and therefore the index could be less or more if an item was added