QVector<int> not working as model?

[tmnku]

Hi,
I have a simple class that holds a QVector<int> as a Q_PROPERTY and I expose this class to QML using setContextProperty. I want to use the vector as a model inside a Repeater but I noticed that even though my QML code can access the data (I can print it to the console) the repeater does not generate any elements. So my question is: do I have to create my own models using QAbstractItemModel even for basic types like QVector<int> which Qt is capable of converting from c++ to js?
I then found this example where they put a QStringList in a QVariant so I tried the same with a QList<int> but still it did not work.
Here is the class which I expose to QML:
MyClass.h:

class MyClass : public QObject {
    Q_OBJECT
    Q_PROPERTY(QVariant mydata READ mydata WRITE setMydata NOTIFY
     mydataChanged)

signals:
     void mydataChanged();

public:
    MyClass(QObject* parent = nullptr);
    QVariant mydata();
    void setMydata(QVariant data);
    QList<int> mydata_;
};

MyClass.cpp

MyClass::MyClass(QObject* parent) : QObject(parent), mydata_({1,2,3,4}) {
}

QVariant MyClass::mydata() {
    return QVariant::fromValue(mydata_);
}

void MyClass::setMydata(QVariant data) {
    mydata_ = data.value<QList<int>>();
    emit mydataChanged();
}

The QML file simply draws a rectangle for each element in the model (works fine when I replace model data with an integer like model: 5)

Repeater {
        model: myclass.mydata
        Rectangle {
            x: index*20
            y: 0
            width: 10
            height: 10
            color: "red"
        }
    }

In case I'm doing it all wrong: what would be the fastest way to create a model which only holds integers?
Thank you very much.

[raven-worx]

@tmnku
https://doc.qt.io/qt-5/qtqml-cppintegration-data.html#sequence-type-to-javascript-array

use the "length" property as model. an access the elements in the delegate component via the "index" variable

[tmnku]

Thank you, that solved my problem!