QComboBox::findData() always returns -1

Question

I am trying to get the id of the record in the model from a QCombobox with findData(index), but when select a item, it retunrs -1. It has been working in another project, but this is the second one that doesn't work. Here's my code:

modAnfi = new QSqlTableModel(this);
modAnfi->setQuery("SELECT id, (nombres || ' ' || apellidos) as Nombre, nombres, apellidos FROM tbPersonas WHERE activo=1");
comboAnfitrion->setModel(modAnfi);
comboAnfitrion->setModelColumn(1);
comboAnfitrion->setEditable(true);
comboAnfitrion->completer()->setCompletionMode(QCompleter::PopupCompletion);

connect(comboAnfitrion, SIGNAL(currentIndexChanged(int)), this, SLOT(currentIndexChangeAnfitrion(int)));

and:

void controlReg::currentIndexChangeAnfitrion(int index)
{

    qDebug() << comboAnfitrion->findData(index); // -1
    qDebug()<< comboAnfitrion->itemData(1); // QVariant(Invalid) 
}

Thanks for your time, any help will be appreciated.

Answer 1

You have to use the model you assign to the comboBox, use the index to look for it: modAnfi->data(modAnfi->index( index, 0));

Answer 2

Check the QComboBox documentation; from the findData description, quoting:

Returns the index of the item containing the given data

Where you are passing index as the "given data". However, index is already an index in the combobox. But you're obviously not looking for an index (since you already have one).

I suspect you actually want to call the itemData method instead? That would retrieve the data associated with an element for a given index.