The async flow doesn't work great with the realm import process. We
might be able to improve on this going forward, but for the time being
adding a synchronous path seems safest.
After all, we are already an an asynchronous (dedicated) thread pool at
this point.
This may not be the cleanest solution, but there don't seem to be any
way towards this either.
- `UseDestinationValue` has been inherited by default as noted in
https://docs.automapper.org/en/stable/10.0-Upgrade-Guide.html#usedestinationvalue-is-now-inherited-by-default, and its behaviour in this case would be using the nested **managed** realm object for the destination member rather than creating an unmanaged version.
- `MaxDepth` already sets `PreserveReferences` so there's no point of using it.
- `MaxDepth` should probably not be set for all maps, only for those with
cyclic references, to avoid the expensive overhead of `PreserveReferences`, as mentioned in https://docs.automapper.org/en/stable/5.0-Upgrade-Guide.html#circular-references.
That aside, `MaxDepth` should actually only be set to `1` for
`BeatmapSetInfo` mapping, because we don't want AutoMapper to create a
nested instance of `BeatmapSetInfo` in each mapped/detached beatmap, but
for some reason, doing that will cause automapper to not map any beatmap
inside the set and leave it with 0 beatmaps.
While on the other hand, using `MaxDepth(2)` for `BeatmapSetInfo` works,
but creates an unused instance of a `BeatmapSetInfo` inside each mapped
beatmap, which may not be ideal.
For `BeatmapInfo`, it has to be `MaxDepth(2)`, in which the first
`BeatmapInfo` depth would be itself (when detaching a beatmap), and the
second would be nested beatmaps inside the mapped/detached
`BeatmapSetInfo` within the beatmap. (note that when detaching a beatmap
set, the unused instance of `BeatmapSetInfo` within each beatmap of that
beatmap set doesn't also have a list of unused beatmaps as one might expect from the depth specification, it surprisingly has 0 beatmaps)
This causes it to create an unused instance of `BeatmapInfo` in the beatmap set resembling the root mapped/detached beatmap, but that one might be inevitable.
