protected override void Dispose(bool disposing)
{
if (disposing)
{
db.Dispose();
}
base.Dispose(disposing);
}
public async Task AddRangeAsync(IEnumerable <UserBook> userBooks)
{
var bookIds = userBooks.Select(u => u.BookId);
var books = await _context.Book.Where(b => bookIds.Contains(b.Id)).ToListAsync();
foreach (var item in userBooks)
{
var book = books.Find(b => b.Id == item.BookId);
if (book.AvailableCount >= item.Count)
{
var entity = Mapper.Map <Entities.UserBook>(item);
await _context.AddAsync(entity);
book.AvailableCount -= item.Count;
}
else
{
_context.Dispose();
throw new OrderedBookAvailabilityException("Books available count has been updated!");
}
}
await _context.SaveChangesAsync();
}