Replace complex postprocessing with a QuerySet annotation.
Replace complex postprocessing with a QuerySet annotation.

Kniyl/cartridge,stephenmcd/cartridge,ryneeverett/cartridge,Parisson/cartridge,wyzex/cartridge,Parisson/cartridge,traxxas/cartridge,Parisson/cartridge,wyzex/cartridge,stephenmcd/cartridge,dsanders11/cartridge,wbtuomela/cartridge,syaiful6/cartridge,wyzex/cartridge,jaywink/cartridge-reservable,dsanders11/cartridge,syaiful6/cartridge,traxxas/cartridge,jaywink/cartridge-reservable,Kniyl/cartridge,Kniyl/cartridge,jaywink/cartridge-reservable,traxxas/cartridge,dsanders11/cartridge,wbtuomela/cartridge,ryneeverett/cartridge,ryneeverett/cartridge,wbtuomela/cartridge,syaiful6/cartridge,stephenmcd/cartridge