Looks to me that you have an object inherited from QObject that tries to use a Copy constructor.
According to this : http://qt-project.org/doc/qt-4.8/object.html#qt-objects-identity-vs-value
QObject and all subclasses of QObject (direct or indirect) have their copy constructor and assignment operator disabled.
Perhaps your Product class should not inherit from QObject. Are there any reasons you need it to be a subclass of QObject? Do you need signals and slots?
Anyway, let me know if I mistook the log, I am not familiar with QDjango.
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