QDataWidgetMapper and custom widget - read value

[Hostel]

I’ve made a my widget which has a Q_PROPERTY like this:

Q_PROPERTY(QDate date READ date WRITE setDate NOTIFY dateChanged USER true )

Q_PROPERTY(QDate date READ date WRITE setDate NOTIFY dateChanged USER true )

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I created a QDataWidgetMapper and addMapping. The date from my widget is not readed by mapper. Even there is not invoked a date() method. What could be wrong? My class inherits from QFrame and has a Q_OBJECT macro.