To query the database, i have to run the query inside the same thread
where the database was created, which means that Database should be a
singleton not only within QML, but also in C++, and has to be the _same_
singleton in both worlds.
Although i expose an object that i have created, i followed the same
section titled “Exposing an existing object as a singleton” from Qt’s
documentation[0]. The only difference is that i do not have to declare
the element as a foreign type, because it is a bona fide QObject.
[0]: https://doc.qt.io/qt-6/qml-singleton.html#exposing-an-existing-
object-as-a-singleton
jordi fita mas
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