Review Request 127862: Keep a reference to the Solid::Device whilst we are using the Solid::Device interface

[David Edmundson]

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https://git.reviewboard.kde.org/r/127862/
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Review request for Plasma.


Repository: kinfocenter


Description
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Otherwise we were effectively relying on Solid's cache for memory
management.

This led to a problem that QML's QObject wrapper would detect the
Solid::Battery was being deleted on shutdown, and re-evaluate
currentBattery. This would then call BatteryModel.fetch(0) which being
slightly behind would then return an invalid object.

This ensure items get deleted in the correct order.

BUG: 350861


Diffs
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  Modules/energy/batterymodel.h c319d197b7cab1bed67151db65193bc5bcb24e2b 
  Modules/energy/batterymodel.cpp 7eade5498eda18ee0cfccddec70d5900c4eb2c96 

Diff: https://git.reviewboard.kde.org/r/127862/diff/


Testing
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Thanks,

David Edmundson

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