public async Task <PaginationQueryResult <BeatmapExport> > GetExportList(
int page = 0,
int countPerPage = 50,
BeatmapOrderOptions options = BeatmapOrderOptions.UpdateTime)
{
var list = Exports.AsNoTracking();
var queryable = options switch
{
BeatmapOrderOptions.UpdateTime => list.OrderByDescending(k => k.CreateTime),
_ => throw new ArgumentOutOfRangeException(nameof(options), options, null)
};
var count = await queryable.CountAsync();
var collection = queryable
.Include(k => k.Beatmap);
var result = await collection
.Skip(page *countPerPage)
.Take(countPerPage)
.ToListAsync();
return(new PaginationQueryResult <BeatmapExport>(result, count));
}