QsqlTableModel not fetching all rows after update

[KillGabio]

Thank you for replying. Line 51 modified :P

I tried calling the reset but nothing changes. Rows showed change to 256 after the edit.

There is no selection, the user only changes the value of one cell so i think i dont have to iterate, right? So i call setData() from the index of interest but still the same, rows trim to 256.

void WidgetModificacion::actualizar_fecha (int row, QSqlRecord & record){
    if (tipo_tabla == 0){
        QSqlQuery query = QSqlQuery (db);
        query.prepare("UPDATE TABLE_PRODUCTOS SET fecha_modificacion = SYSDATE WHERE id_codigo_barra = :value");
        query.bindValue (":value", this->ui->tableView->model ()->data (this->ui->tableView->model ()->index (row, 0)).toString ());
        query.exec ();
    }
    //ui->tableView->reset();
    model->setData(model->index(row,5), QDateTime::currentDateTime().toString(),Qt::DisplayRole);
    while (model->canFetchMore())model->fetchMore();
}

void WidgetModificacion::actualizar_fecha (int row, QSqlRecord & record){
    if (tipo_tabla == 0){
        QSqlQuery query = QSqlQuery (db);
        query.prepare("UPDATE TABLE_PRODUCTOS SET fecha_modificacion = SYSDATE WHERE id_codigo_barra = :value");
        query.bindValue (":value", this->ui->tableView->model ()->data (this->ui->tableView->model ()->index (row, 0)).toString ());
        query.exec ();
    }
    //ui->tableView->reset();
    model->setData(model->index(row,5), QDateTime::currentDateTime().toString(),Qt::DisplayRole);
    while (model->canFetchMore())model->fetchMore();
}

To copy to clipboard, switch view to plain text mode 

The value is always updated after edit and i can see that value modified but rows set to 256 anyways.