Qt::ItemFlags MyTableModel::flags(const QModelIndex & index) const {

    if(!index.isValid())
        return Qt::ItemIsEnabled;

    return QAbstractTableModel::flags(index) | Qt::ItemIsSelectable;
}

void MyTableModel::addRecord(RecordPtr newone){

    //...

    int position= recordsCollection->size();
    beginInsertRows(QModelIndex(), position, position);
    recordsCollection->push_back(newone);
    endInsertRows();
    emit(dataChanged(QModelIndex(), QModelIndex()));
}