def change_fave(self, user):
fave = Fave.get_unique(ref_type=self.__class__.__name__, ref_pk=self.id, user=user)
if fave is None:
fave = Fave.create(ref_type=self.__class__.__name__, ref_pk=self.id, user=user)
fave.save()
self.popularity += 5
else:
fave.delete()
self.popularity = max(0, self.popularity - 5)
self.save()
def faves(self):
return Fave.find_by_ref(ref_type=self.__class__.__name__, ref_pk=self.id)
