QTableView + QCompleter delegate returns wrong value - c++

Question

I'm using Qt (C++), specifically I have a table that auto-completes using a QCompleter. I'm very new to Qt and struggling with this.
My problem is that even though the QCompleter shows the correct values, the data it returns is always the data for the first element.
For example, if I have the following data (fields separated by dashes, data made up):
1-David-197598713-Los Angeles
2-Daniel-1933398713-NYC
3-Don-1975555-Argentina
And I type D, the QCompleter shows the 3 options, but regardless of which I pick, this happens:
The actual cell edits "correctly" (the value reflects what's been picked)
The callback receives the WRONG value (always the ID of the first element)
So in this case I'd always get (Assuming the name is the autocomplete field):
1-Daniel-197598713-Los Angeles or 1-Don-197598713-Los Angeles or 1-David-197598713-Los Angeles
Also, for some motive the setEditorData procedure does nothing at all (if I comment it, the behavior doesn't change at all)
This is my entire delegate source:
productNameDelegate::productNameDelegate(QObject *parent) : QItemDelegate(parent)
{
}
QWidget *productNameDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/* option */,
const QModelIndex &/* index */) const
{
QLineEdit *editor = new QLineEdit(parent);
QCompleter *q = new QCompleter(db::getProductsNames());
q->setCaseSensitivity(Qt::CaseInsensitive);
q->setCompletionMode(QCompleter::PopupCompletion);
editor->setCompleter(q);
return editor;
}
void productNameDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{ //TODO this procedure doesn't affect the code at all
QString value = index.model()->data(index, Qt::EditRole).toString();
QLineEdit *LineEdit = static_cast<QLineEdit*>(editor);
LineEdit->setText(value);
}
void productNameDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
QLineEdit *LineEdit = static_cast<QLineEdit*>(editor);
QString value = LineEdit->text();
int code=LineEdit->completer()->currentIndex().data(Qt::UserRole).toInt(); //FIXME: siempre devuelve el primer elemento de la lista
if (index.column()==2 && index.row()>=6 && index.row() <= 25)
m->addProducto(code, index.row());
model->setData(index, value, Qt::EditRole);
}
void productNameDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
editor->setGeometry(option.rect);
}
void productNameDelegate::setModel(factura* m) {
this->m=m;
}