QQmlProperty loses data

Redman

Hello,

I read some data from my database and create a model instance from that data.
One attribute on that class is a QQmlPropertyMap. After returning the created model instance from the function where I read the data and create the instance, the data inside the QQmlPropertyMap is lost.

I assume the reason for that is, that the QQmlPropertyMap data is actually a QScopedPointer as seen in the screenshot below:

How can I keep the QQmlPropertyMap populated when I return the surrounding object from my function?

What exactly am I doing?

// read data from database happened prior in this function

QQmlPropertyMap* airEjMapping =
      createQQmlPropertyMapFromString(
           m->getAttribute("airEjectionMapping").value<QString>());

   // Create object
   Mp* mp = new Mp(m->getAttribute("id").value<qint32>(),
   airEjMapping);

   return mp;


// Mp ctor
Mp::Mp(const qint32 id,
    QQmlPropertyMap* airEjMapping
    : m_id(id)
 {
   // I save the QQmlProperty as QSharedPointer
   m_airEjectionMapping.reset(airEjMapping);
 }

After returning the contents of that property looks like this

Now, how am I supposed to pass my model through my application without losing data?