protected override async Task <IReadOnlyDictionary <int, FirstClass> > LoadBatchAsync(IReadOnlyList <int> keys, CancellationToken cancellationToken)
{
await using FirstDbContext dbContext =
_dbContextFactory.CreateDbContext();
return(await dbContext.Firsts
.Where(s => keys.Contains(s.Id))
.ToDictionaryAsync(t => t.Id, cancellationToken));
}
public IQueryable <FirstClass> GetFirsts([ScopedService] FirstDbContext context) => context.Firsts;
