Take a look at lSuper Macros and Smart Data Model

With those 2 projects, you can easely create a data model class from C++ and use it from QML.

For example, PhoneBook class

#include <QQmlConstRefPropertyHelpers.h>
#include <QQmlObjectListModel.h>


class PhoneContact: public Object
{
    Q_OBJECT

    QML_WRITABLE_CSTREF_PROPERTY(QString, firstName)
    QML_WRITABLE_CSTREF_PROPERTY(QString, lastName)
    QML_WRITABLE_CSTREF_PROPERTY(QString, phoneNumber)

public:
    explicit PhoneContact(QObject* parent=nullptr)
        : QObject(parent)
        , m_firstName(QString())
        , m_lastName(QString())
        , m_phoneNumber(QString())
     {}
    explicit PhoneContact(const QString& firstName, const QString& lastName, const QString& phoneNumber, QObject* parent=nullptr)
        : QObject(parent)
        , m_firstName(firstName)
        , m_lastName(lastName)
        , m_phoneNumber(phoneNumber)
     {}
};

class PhoneBook: plublic QObject
{
    Q_OBJECT

    QML_OBJMODEL_PROPERTY(PhoneContact, modelContacts)

public:
    explicit PhoneBook(QObject *parent=nullptr)
        : QObject(parent)
        , m_modelContacts(new QQmlObjectListModel<PhoneContact>(this))
    {
        // add dummy contacts
        m_modelContacts->append(new PhoneContact("John", "Doe", "555-55"));
    }
   ....
}

And then, you expose to QML an instance of PhoneBook as "phoneBook". Finally you can have acces to the model from QML with phoneBook.modelContacts, and each item has an attribut firstName, lastName and phoneNumber (like declared in PhoneContact class) and also the instance is accessible via attibut qtObject.

For more details take a look at his Lightning Talk or presentation Cut development time and cost with Qt and QML

Happy coding ;)

 Text {
            anchors.centerIn: parent
            text: name + " " + cost.get(1).description
        }

You can access the value of description with respect to index, the above code will give you the value
"Seedless", if you want "Tropical" then you need to change the value, you need to make it "0", here is the sample code below

 Text {
            anchors.centerIn: parent
            text: name + " " + cost.get(0).description
        }