QStandardItemModel:appendRow. How to add and get the line back.

[morde]

Do not add lines (or are not added?) QStandardItemModel♪

Here's the code:

    QStandardItem * pProduct = new QStandardItem("3");
    pProduct->setData("product", strProductName);
    this->appendRow(pProduct);
QList<QStandardItem *> entries = this->findItems("product");
qDebug() << entries.count();

And therefore, the conclusion is always 0♪
What am I doing wrong?
How can I add and get the line back?

UPD: The problem was solved:

    QStandardItem * pChildEntry = new QStandardItem(QString("name"));

pChildEntry->setData(QString("product"), strProductName);

model.appendRow(pChildEntry);

qDebug() << model.rowCount();

QList&lt;QStandardItem *&gt; entries = model.findItems(QString("product"));
entries.count();

The number of lines is normal, therefore the search is not working, not the addition of the lines.

[Avante]

Lines may be added, for example:

QStandardItemModel model(10, 10);
QList<QStandardItem*> row;
for (int i = 0; i < model.colCount(); i++)
{
    QStandardItem* item = new QStandardItem(QString("column %1").arg(i));
    row.append(item);
}
model.append(row);

If there's only one column in the model, it's a little easier:

QStandardItemModel* model = new QStandardItemModel(0, 0);
for (int i = 0; i < 10; ++i)
    model->appendRow(new QStandardItem(QString("Row %1").arg(i)));

Method QStandardItemModel::findItems searches, comparing only data with a role Qt::DisplayRole♪ Next code

QStandardItemModel* model = new QStandardItemModel();
QStandardItem* item0 = new QStandardItem("Item0");

model->appendRow(item0);

qDebug() << "Item0:" << model->findItems("Item0").count();
QStandardItem* item1 = new QStandardItem();

item1->setData("Item1", Qt::DisplayRole);

model->appendRow(item1);

qDebug() << "Item1:" << model->findItems("Item1").count();
QStandardItem* item2 = new QStandardItem();

item1->setData("Item2", Qt::UserRole);

model->appendRow(item2);

qDebug() << "Item2:" << model->findItems("Item2").count();

Ejects into the console

Item0: 1

Item1: 1

Item2: 0

So, if you've identified the data as a challenge to the method QStandardItem::setData with a second parameter, different from Qt::DisplayRole♪ QStandardItemModel::findItems That's not gonna work.